Merge branch 'misc2' into devel

Documentation/arm/memory.txt

@@ -59,7 +59,11 @@ PAGE_OFFSET	high_memory-1	Kernel direct-mapped RAM region.
 				This maps the platforms RAM, and typically
 				maps all platform RAM in a 1:1 relationship.
 
-TASK_SIZE	PAGE_OFFSET-1	Kernel module space
+PKMAP_BASE	PAGE_OFFSET-1	Permanent kernel mappings
+				One way of mapping HIGHMEM pages into kernel
+				space.
+
+MODULES_VADDR	MODULES_END-1	Kernel module space
 				Kernel modules inserted via insmod are
 				placed here using dynamic mappings.
 

arch/arm/Kconfig

@@ -12,6 +12,7 @@ config ARM
 	select HAVE_IDE
 	select RTC_LIB
 	select SYS_SUPPORTS_APM_EMULATION
+	select GENERIC_ATOMIC64 if (!CPU_32v6K)
 	select HAVE_OPROFILE
 	select HAVE_ARCH_KGDB
 	select HAVE_KPROBES if (!XIP_KERNEL)
@@ -54,6 +55,9 @@ config HAVE_TCM
 	bool
 	select GENERIC_ALLOCATOR
 
+config HAVE_PROC_CPU
+	bool
+
 config NO_IOPORT
 	bool
 
@@ -163,6 +167,11 @@ config ARCH_MTD_XIP
 config GENERIC_HARDIRQS_NO__DO_IRQ
 	def_bool y
 
+config ARM_L1_CACHE_SHIFT_6
+	bool
+	help
+	  Setting ARM L1 cache line size to 64 Bytes.
+
 if OPROFILE
 
 config OPROFILE_ARMV6
@@ -649,6 +658,7 @@ config ARCH_S5PC1XX
 	select GENERIC_GPIO
 	select HAVE_CLK
 	select CPU_V7
+	select ARM_L1_CACHE_SHIFT_6
 	help
 	  Samsung S5PC1XX series based systems
 
@@ -938,6 +948,19 @@ config ARM_ERRATA_460075
 	  ACTLR register. Note that setting specific bits in the ACTLR register
 	  may not be available in non-secure mode.
 
+config PL310_ERRATA_588369
+	bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
+	depends on CACHE_L2X0 && ARCH_OMAP4
+	help
+	   The PL310 L2 cache controller implements three types of Clean &
+	   Invalidate maintenance operations: by Physical Address
+	   (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
+	   They are architecturally defined to behave as the execution of a
+	   clean operation followed immediately by an invalidate operation,
+	   both performing to the same memory location. This functionality
+	   is not correctly implemented in PL310 as clean lines are not
+	   invalidated as a result of these operations. Note that this errata
+	   uses Texas Instrument's secure monitor api.
 endmenu
 
 source "arch/arm/common/Kconfig"
@@ -1255,6 +1278,7 @@ config ALIGNMENT_TRAP
 	bool
 	depends on CPU_CP15_MMU
 	default y if !ARCH_EBSA110
+	select HAVE_PROC_CPU if PROC_FS
 	help
 	  ARM processors cannot fetch/store information which is not
 	  naturally aligned on the bus, i.e., a 4 byte fetch must start at an

arch/arm/boot/compressed/Makefile

@@ -5,7 +5,7 @@
 #
 
 HEAD	= head.o
-OBJS	= misc.o
+OBJS	= misc.o decompress.o
 FONTC	= $(srctree)/drivers/video/console/font_acorn_8x8.c
 
 #
@@ -106,10 +106,6 @@ lib1funcs = $(obj)/lib1funcs.o
 $(obj)/lib1funcs.S: $(srctree)/arch/$(SRCARCH)/lib/lib1funcs.S FORCE
 	$(call cmd,shipped)
 
-# Don't allow any static data in misc.o, which
-# would otherwise mess up our GOT table
-CFLAGS_misc.o := -Dstatic=
-
 $(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/$(HEAD) $(obj)/piggy.$(suffix_y).o \
 	 	$(addprefix $(obj)/, $(OBJS)) $(lib1funcs) FORCE
 	$(call if_changed,ld)

arch/arm/boot/compressed/decompress.c

@@ -0,0 +1,45 @@
+#define _LINUX_STRING_H_
+
+#include <linux/compiler.h>	/* for inline */
+#include <linux/types.h>	/* for size_t */
+#include <linux/stddef.h>	/* for NULL */
+#include <linux/linkage.h>
+#include <asm/string.h>
+
+extern unsigned long free_mem_ptr;
+extern unsigned long free_mem_end_ptr;
+extern void error(char *);
+
+#define STATIC static
+
+#define ARCH_HAS_DECOMP_WDOG
+
+/* Diagnostic functions */
+#ifdef DEBUG
+#  define Assert(cond,msg) {if(!(cond)) error(msg);}
+#  define Trace(x) fprintf x
+#  define Tracev(x) {if (verbose) fprintf x ;}
+#  define Tracevv(x) {if (verbose>1) fprintf x ;}
+#  define Tracec(c,x) {if (verbose && (c)) fprintf x ;}
+#  define Tracecv(c,x) {if (verbose>1 && (c)) fprintf x ;}
+#else
+#  define Assert(cond,msg)
+#  define Trace(x)
+#  define Tracev(x)
+#  define Tracevv(x)
+#  define Tracec(c,x)
+#  define Tracecv(c,x)
+#endif
+
+#ifdef CONFIG_KERNEL_GZIP
+#include "../../../../lib/decompress_inflate.c"
+#endif
+
+#ifdef CONFIG_KERNEL_LZO
+#include "../../../../lib/decompress_unlzo.c"
+#endif
+
+void do_decompress(u8 *input, int len, u8 *output, void (*error)(char *x))
+{
+	decompress(input, len, NULL, NULL, output, NULL, error);
+}

arch/arm/boot/compressed/misc.c

@@ -23,8 +23,8 @@ unsigned int __machine_arch_type;
 #include <linux/compiler.h>	/* for inline */
 #include <linux/types.h>	/* for size_t */
 #include <linux/stddef.h>	/* for NULL */
-#include <asm/string.h>
 #include <linux/linkage.h>
+#include <asm/string.h>
 
 #include <asm/unaligned.h>
 
@@ -117,57 +117,7 @@ static void putstr(const char *ptr)
 
 #endif
 
-#define __ptr_t void *
-
-#define memzero(s,n) __memzero(s,n)
-
-/*
- * Optimised C version of memzero for the ARM.
- */
-void __memzero (__ptr_t s, size_t n)
-{
-	union { void *vp; unsigned long *ulp; unsigned char *ucp; } u;
-	int i;
-
-	u.vp = s;
-
-	for (i = n >> 5; i > 0; i--) {
-		*u.ulp++ = 0;
-		*u.ulp++ = 0;
-		*u.ulp++ = 0;
-		*u.ulp++ = 0;
-		*u.ulp++ = 0;
-		*u.ulp++ = 0;
-		*u.ulp++ = 0;
-		*u.ulp++ = 0;
-	}
-
-	if (n & 1 << 4) {
-		*u.ulp++ = 0;
-		*u.ulp++ = 0;
-		*u.ulp++ = 0;
-		*u.ulp++ = 0;
-	}
-
-	if (n & 1 << 3) {
-		*u.ulp++ = 0;
-		*u.ulp++ = 0;
-	}
-
-	if (n & 1 << 2)
-		*u.ulp++ = 0;
-
-	if (n & 1 << 1) {
-		*u.ucp++ = 0;
-		*u.ucp++ = 0;
-	}
-
-	if (n & 1)
-		*u.ucp++ = 0;
-}
-
-static inline __ptr_t memcpy(__ptr_t __dest, __const __ptr_t __src,
-			    size_t __n)
+void *memcpy(void *__dest, __const void *__src, size_t __n)
 {
 	int i = 0;
 	unsigned char *d = (unsigned char *)__dest, *s = (unsigned char *)__src;
@@ -204,59 +154,20 @@ static inline __ptr_t memcpy(__ptr_t __dest, __const __ptr_t __src,
 /*
  * gzip delarations
  */
-#define STATIC static
-
-/* Diagnostic functions */
-#ifdef DEBUG
-#  define Assert(cond,msg) {if(!(cond)) error(msg);}
-#  define Trace(x) fprintf x
-#  define Tracev(x) {if (verbose) fprintf x ;}
-#  define Tracevv(x) {if (verbose>1) fprintf x ;}
-#  define Tracec(c,x) {if (verbose && (c)) fprintf x ;}
-#  define Tracecv(c,x) {if (verbose>1 && (c)) fprintf x ;}
-#else
-#  define Assert(cond,msg)
-#  define Trace(x)
-#  define Tracev(x)
-#  define Tracevv(x)
-#  define Tracec(c,x)
-#  define Tracecv(c,x)
-#endif
-
-static void error(char *m);
-
 extern char input_data[];
 extern char input_data_end[];
 
-static unsigned char *output_data;
-static unsigned long output_ptr;
-
-static void error(char *m);
+unsigned char *output_data;
+unsigned long output_ptr;
 
-static void putstr(const char *);
-
-static unsigned long free_mem_ptr;
-static unsigned long free_mem_end_ptr;
-
-#ifdef STANDALONE_DEBUG
-#define NO_INFLATE_MALLOC
-#endif
-
-#define ARCH_HAS_DECOMP_WDOG
-
-#ifdef CONFIG_KERNEL_GZIP
-#include "../../../../lib/decompress_inflate.c"
-#endif
-
-#ifdef CONFIG_KERNEL_LZO
-#include "../../../../lib/decompress_unlzo.c"
-#endif
+unsigned long free_mem_ptr;
+unsigned long free_mem_end_ptr;
 
 #ifndef arch_error
 #define arch_error(x)
 #endif
 
-static void error(char *x)
+void error(char *x)
 {
 	arch_error(x);
 
@@ -272,6 +183,8 @@ asmlinkage void __div0(void)
 	error("Attempting division by 0!");
 }
 
+extern void do_decompress(u8 *input, int len, u8 *output, void (*error)(char *x));
+
 #ifndef STANDALONE_DEBUG
 
 unsigned long
@@ -292,8 +205,8 @@ decompress_kernel(unsigned long output_start, unsigned long free_mem_ptr_p,
 	output_ptr = get_unaligned_le32(tmp);
 
 	putstr("Uncompressing Linux...");
-	decompress(input_data, input_data_end - input_data,
-			NULL, NULL, output_data, NULL, error);
+	do_decompress(input_data, input_data_end - input_data,
+			output_data, error);
 	putstr(" done, booting the kernel.\n");
 	return output_ptr;
 }

arch/arm/boot/compressed/vmlinux.lds.in

@@ -14,6 +14,13 @@ SECTIONS
   /DISCARD/ : {
     *(.ARM.exidx*)
     *(.ARM.extab*)
+    /*
+     * Discard any r/w data - this produces a link error if we have any,
+     * which is required for PIC decompression.  Local data generates
+     * GOTOFF relocations, which prevents it being relocated independently
+     * of the text/got segments.
+     */
+    *(.data)
   }
 
   . = TEXT_START;
@@ -40,7 +47,6 @@ SECTIONS
   .got			: { *(.got) }
   _got_end = .;
   .got.plt		: { *(.got.plt) }
-  .data			: { *(.data) }
   _edata = .;
 
   . = BSS_START;

arch/arm/configs/omap_4430sdp_defconfig

@@ -242,10 +242,13 @@ CONFIG_CPU_CP15_MMU=y
 # CONFIG_CPU_DCACHE_DISABLE is not set
 # CONFIG_CPU_BPREDICT_DISABLE is not set
 CONFIG_HAS_TLS_REG=y
+CONFIG_OUTER_CACHE=y
+CONFIG_CACHE_L2X0=y
 CONFIG_ARM_L1_CACHE_SHIFT=5
 # CONFIG_ARM_ERRATA_430973 is not set
 # CONFIG_ARM_ERRATA_458693 is not set
 # CONFIG_ARM_ERRATA_460075 is not set
+CONFIG_PL310_ERRATA_588369=y
 CONFIG_ARM_GIC=y
 
 #

arch/arm/include/asm/atomic.h

@@ -235,6 +235,234 @@ static inline int atomic_add_unless(atomic_t *v, int a, int u)
 #define smp_mb__before_atomic_inc()	smp_mb()
 #define smp_mb__after_atomic_inc()	smp_mb()
 
+#ifndef CONFIG_GENERIC_ATOMIC64
+typedef struct {
+	u64 __aligned(8) counter;
+} atomic64_t;
+
+#define ATOMIC64_INIT(i) { (i) }
+
+static inline u64 atomic64_read(atomic64_t *v)
+{
+	u64 result;
+
+	__asm__ __volatile__("@ atomic64_read\n"
+"	ldrexd	%0, %H0, [%1]"
+	: "=&r" (result)
+	: "r" (&v->counter)
+	);
+
+	return result;
+}
+
+static inline void atomic64_set(atomic64_t *v, u64 i)
+{
+	u64 tmp;
+
+	__asm__ __volatile__("@ atomic64_set\n"
+"1:	ldrexd	%0, %H0, [%1]\n"
+"	strexd	%0, %2, %H2, [%1]\n"
+"	teq	%0, #0\n"
+"	bne	1b"
+	: "=&r" (tmp)
+	: "r" (&v->counter), "r" (i)
+	: "cc");
+}
+
+static inline void atomic64_add(u64 i, atomic64_t *v)
+{
+	u64 result;
+	unsigned long tmp;
+
+	__asm__ __volatile__("@ atomic64_add\n"
+"1:	ldrexd	%0, %H0, [%2]\n"
+"	adds	%0, %0, %3\n"
+"	adc	%H0, %H0, %H3\n"
+"	strexd	%1, %0, %H0, [%2]\n"
+"	teq	%1, #0\n"
+"	bne	1b"
+	: "=&r" (result), "=&r" (tmp)
+	: "r" (&v->counter), "r" (i)
+	: "cc");
+}
+
+static inline u64 atomic64_add_return(u64 i, atomic64_t *v)
+{
+	u64 result;
+	unsigned long tmp;
+
+	smp_mb();
+
+	__asm__ __volatile__("@ atomic64_add_return\n"
+"1:	ldrexd	%0, %H0, [%2]\n"
+"	adds	%0, %0, %3\n"
+"	adc	%H0, %H0, %H3\n"
+"	strexd	%1, %0, %H0, [%2]\n"
+"	teq	%1, #0\n"
+"	bne	1b"
+	: "=&r" (result), "=&r" (tmp)
+	: "r" (&v->counter), "r" (i)
+	: "cc");
+
+	smp_mb();
+
+	return result;
+}
+
+static inline void atomic64_sub(u64 i, atomic64_t *v)
+{
+	u64 result;
+	unsigned long tmp;
+
+	__asm__ __volatile__("@ atomic64_sub\n"
+"1:	ldrexd	%0, %H0, [%2]\n"
+"	subs	%0, %0, %3\n"
+"	sbc	%H0, %H0, %H3\n"
+"	strexd	%1, %0, %H0, [%2]\n"
+"	teq	%1, #0\n"
+"	bne	1b"
+	: "=&r" (result), "=&r" (tmp)
+	: "r" (&v->counter), "r" (i)
+	: "cc");
+}
+
+static inline u64 atomic64_sub_return(u64 i, atomic64_t *v)
+{
+	u64 result;
+	unsigned long tmp;
+
+	smp_mb();
+
+	__asm__ __volatile__("@ atomic64_sub_return\n"
+"1:	ldrexd	%0, %H0, [%2]\n"
+"	subs	%0, %0, %3\n"
+"	sbc	%H0, %H0, %H3\n"
+"	strexd	%1, %0, %H0, [%2]\n"
+"	teq	%1, #0\n"
+"	bne	1b"
+	: "=&r" (result), "=&r" (tmp)
+	: "r" (&v->counter), "r" (i)
+	: "cc");
+
+	smp_mb();
+
+	return result;
+}
+
+static inline u64 atomic64_cmpxchg(atomic64_t *ptr, u64 old, u64 new)
+{
+	u64 oldval;
+	unsigned long res;
+
+	smp_mb();
+
+	do {
+		__asm__ __volatile__("@ atomic64_cmpxchg\n"
+		"ldrexd		%1, %H1, [%2]\n"
+		"mov		%0, #0\n"
+		"teq		%1, %3\n"
+		"teqeq		%H1, %H3\n"
+		"strexdeq	%0, %4, %H4, [%2]"
+		: "=&r" (res), "=&r" (oldval)
+		: "r" (&ptr->counter), "r" (old), "r" (new)
+		: "cc");
+	} while (res);
+
+	smp_mb();
+
+	return oldval;
+}
+
+static inline u64 atomic64_xchg(atomic64_t *ptr, u64 new)
+{
+	u64 result;
+	unsigned long tmp;
+
+	smp_mb();
+
+	__asm__ __volatile__("@ atomic64_xchg\n"
+"1:	ldrexd	%0, %H0, [%2]\n"
+"	strexd	%1, %3, %H3, [%2]\n"
+"	teq	%1, #0\n"
+"	bne	1b"
+	: "=&r" (result), "=&r" (tmp)
+	: "r" (&ptr->counter), "r" (new)
+	: "cc");
+
+	smp_mb();
+
+	return result;
+}
+
+static inline u64 atomic64_dec_if_positive(atomic64_t *v)
+{
+	u64 result;
+	unsigned long tmp;
+
+	smp_mb();
+
+	__asm__ __volatile__("@ atomic64_dec_if_positive\n"
+"1:	ldrexd	%0, %H0, [%2]\n"
+"	subs	%0, %0, #1\n"
+"	sbc	%H0, %H0, #0\n"
+"	teq	%H0, #0\n"
+"	bmi	2f\n"
+"	strexd	%1, %0, %H0, [%2]\n"
+"	teq	%1, #0\n"
+"	bne	1b\n"
+"2:"
+	: "=&r" (result), "=&r" (tmp)
+	: "r" (&v->counter)
+	: "cc");
+
+	smp_mb();
+
+	return result;
+}
+
+static inline int atomic64_add_unless(atomic64_t *v, u64 a, u64 u)
+{
+	u64 val;
+	unsigned long tmp;
+	int ret = 1;
+
+	smp_mb();
+
+	__asm__ __volatile__("@ atomic64_add_unless\n"
+"1:	ldrexd	%0, %H0, [%3]\n"
+"	teq	%0, %4\n"
+"	teqeq	%H0, %H4\n"
+"	moveq	%1, #0\n"
+"	beq	2f\n"
+"	adds	%0, %0, %5\n"
+"	adc	%H0, %H0, %H5\n"
+"	strexd	%2, %0, %H0, [%3]\n"
+"	teq	%2, #0\n"
+"	bne	1b\n"
+"2:"
+	: "=&r" (val), "=&r" (ret), "=&r" (tmp)
+	: "r" (&v->counter), "r" (u), "r" (a)
+	: "cc");
+
+	if (ret)
+		smp_mb();
+
+	return ret;
+}
+
+#define atomic64_add_negative(a, v)	(atomic64_add_return((a), (v)) < 0)
+#define atomic64_inc(v)			atomic64_add(1LL, (v))
+#define atomic64_inc_return(v)		atomic64_add_return(1LL, (v))
+#define atomic64_inc_and_test(v)	(atomic64_inc_return(v) == 0)
+#define atomic64_sub_and_test(a, v)	(atomic64_sub_return((a), (v)) == 0)
+#define atomic64_dec(v)			atomic64_sub(1LL, (v))
+#define atomic64_dec_return(v)		atomic64_sub_return(1LL, (v))
+#define atomic64_dec_and_test(v)	(atomic64_dec_return((v)) == 0)
+#define atomic64_inc_not_zero(v)	atomic64_add_unless((v), 1LL, 0LL)
+
+#else /* !CONFIG_GENERIC_ATOMIC64 */
+#include <asm-generic/atomic64.h>
+#endif
 #include <asm-generic/atomic-long.h>
 #endif
 #endif

arch/arm/include/asm/io.h

@@ -69,9 +69,16 @@ extern void __raw_readsl(const void __iomem *addr, void *data, int longlen);
 /*
  * __arm_ioremap takes CPU physical address.
  * __arm_ioremap_pfn takes a Page Frame Number and an offset into that page
+ * The _caller variety takes a __builtin_return_address(0) value for
+ * /proc/vmalloc to use - and should only be used in non-inline functions.
  */
-extern void __iomem * __arm_ioremap_pfn(unsigned long, unsigned long, size_t, unsigned int);
-extern void __iomem * __arm_ioremap(unsigned long, size_t, unsigned int);
+extern void __iomem *__arm_ioremap_pfn_caller(unsigned long, unsigned long,
+	size_t, unsigned int, void *);
+extern void __iomem *__arm_ioremap_caller(unsigned long, size_t, unsigned int,
+	void *);
+
+extern void __iomem *__arm_ioremap_pfn(unsigned long, unsigned long, size_t, unsigned int);
+extern void __iomem *__arm_ioremap(unsigned long, size_t, unsigned int);
 extern void __iounmap(volatile void __iomem *addr);
 
 /*

arch/arm/include/asm/mach/time.h

@@ -46,12 +46,4 @@ struct sys_timer {
 extern struct sys_timer *system_timer;
 extern void timer_tick(void);
 
-/*
- * Kernel time keeping support.
- */
-struct timespec;
-extern int (*set_rtc)(void);
-extern void save_time_delta(struct timespec *delta, struct timespec *rtc);
-extern void restore_time_delta(struct timespec *delta, struct timespec *rtc);
-
 #endif

arch/arm/include/asm/memory.h

@@ -76,6 +76,17 @@
  */
 #define IOREMAP_MAX_ORDER	24
 
+/*
+ * Size of DMA-consistent memory region.  Must be multiple of 2M,
+ * between 2MB and 14MB inclusive.
+ */
+#ifndef CONSISTENT_DMA_SIZE
+#define CONSISTENT_DMA_SIZE 	SZ_2M
+#endif
+
+#define CONSISTENT_END		(0xffe00000UL)
+#define CONSISTENT_BASE		(CONSISTENT_END - CONSISTENT_DMA_SIZE)
+
 #else /* CONFIG_MMU */
 
 /*
@@ -93,11 +104,11 @@
 #endif
 
 #ifndef PHYS_OFFSET
-#define PHYS_OFFSET 		(CONFIG_DRAM_BASE)
+#define PHYS_OFFSET 		UL(CONFIG_DRAM_BASE)
 #endif
 
 #ifndef END_MEM
-#define END_MEM     		(CONFIG_DRAM_BASE + CONFIG_DRAM_SIZE)
+#define END_MEM     		(UL(CONFIG_DRAM_BASE) + CONFIG_DRAM_SIZE)
 #endif
 
 #ifndef PAGE_OFFSET
@@ -112,14 +123,6 @@
 
 #endif /* !CONFIG_MMU */
 
-/*
- * Size of DMA-consistent memory region.  Must be multiple of 2M,
- * between 2MB and 14MB inclusive.
- */
-#ifndef CONSISTENT_DMA_SIZE
-#define CONSISTENT_DMA_SIZE SZ_2M
-#endif
-
 /*
  * Physical vs virtual RAM address space conversion.  These are
  * private definitions which should NOT be used outside memory.h

arch/arm/include/asm/mmu.h

@@ -6,6 +6,7 @@
 typedef struct {
 #ifdef CONFIG_CPU_HAS_ASID
 	unsigned int id;
+	spinlock_t id_lock;
 #endif
 	unsigned int kvm_seq;
 } mm_context_t;

arch/arm/include/asm/mmu_context.h

@@ -43,12 +43,23 @@ void __check_kvm_seq(struct mm_struct *mm);
 #define ASID_FIRST_VERSION	(1 << ASID_BITS)
 
 extern unsigned int cpu_last_asid;
+#ifdef CONFIG_SMP
+DECLARE_PER_CPU(struct mm_struct *, current_mm);
+#endif
 
 void __init_new_context(struct task_struct *tsk, struct mm_struct *mm);
 void __new_context(struct mm_struct *mm);
 
 static inline void check_context(struct mm_struct *mm)
 {
+	/*
+	 * This code is executed with interrupts enabled. Therefore,
+	 * mm->context.id cannot be updated to the latest ASID version
+	 * on a different CPU (and condition below not triggered)
+	 * without first getting an IPI to reset the context. The
+	 * alternative is to take a read_lock on mm->context.id_lock
+	 * (after changing its type to rwlock_t).
+	 */
 	if (unlikely((mm->context.id ^ cpu_last_asid) >> ASID_BITS))
 		__new_context(mm);
 
@@ -108,6 +119,10 @@ switch_mm(struct mm_struct *prev, struct mm_struct *next,
 		__flush_icache_all();
 #endif
 	if (!cpumask_test_and_set_cpu(cpu, mm_cpumask(next)) || prev != next) {
+#ifdef CONFIG_SMP
+		struct mm_struct **crt_mm = &per_cpu(current_mm, cpu);
+		*crt_mm = next;
+#endif
 		check_context(next);
 		cpu_switch_mm(next->pgd, next);
 		if (cache_is_vivt())

arch/arm/include/asm/pgtable-nommu.h

@@ -86,8 +86,8 @@ extern unsigned int kobjsize(const void *objp);
  * All 32bit addresses are effectively valid for vmalloc...
  * Sort of meaningless for non-VM targets.
  */
-#define	VMALLOC_START	0
-#define	VMALLOC_END	0xffffffff
+#define	VMALLOC_START	0UL
+#define	VMALLOC_END	0xffffffffUL
 
 #define FIRST_USER_ADDRESS      (0)
 

arch/arm/include/asm/setup.h

@@ -223,18 +223,6 @@ extern struct meminfo meminfo;
 #define bank_phys_end(bank)	((bank)->start + (bank)->size)
 #define bank_phys_size(bank)	(bank)->size
 
-/*
- * Early command line parameters.
- */
-struct early_params {
-	const char *arg;
-	void (*fn)(char **p);
-};
-
-#define __early_param(name,fn)					\
-static struct early_params __early_##fn __used			\
-__attribute__((__section__(".early_param.init"))) = { name, fn }
-
 #endif  /*  __KERNEL__  */
 
 #endif

arch/arm/include/asm/spinlock.h

@@ -5,6 +5,22 @@
 #error SMP not supported on pre-ARMv6 CPUs
 #endif
 
+static inline void dsb_sev(void)
+{
+#if __LINUX_ARM_ARCH__ >= 7
+	__asm__ __volatile__ (
+		"dsb\n"
+		"sev"
+	);
+#elif defined(CONFIG_CPU_32v6K)
+	__asm__ __volatile__ (
+		"mcr p15, 0, %0, c7, c10, 4\n"
+		"sev"
+		: : "r" (0)
+	);
+#endif
+}
+
 /*
  * ARMv6 Spin-locking.
  *
@@ -69,13 +85,11 @@ static inline void arch_spin_unlock(arch_spinlock_t *lock)
 
 	__asm__ __volatile__(
 "	str	%1, [%0]\n"
-#ifdef CONFIG_CPU_32v6K
-"	mcr	p15, 0, %1, c7, c10, 4\n" /* DSB */
-"	sev"
-#endif
 	:
 	: "r" (&lock->lock), "r" (0)
 	: "cc");
+
+	dsb_sev();
 }
 
 /*
@@ -132,13 +146,11 @@ static inline void arch_write_unlock(arch_rwlock_t *rw)
 
 	__asm__ __volatile__(
 	"str	%1, [%0]\n"
-#ifdef CONFIG_CPU_32v6K
-"	mcr	p15, 0, %1, c7, c10, 4\n" /* DSB */
-"	sev\n"
-#endif
 	:
 	: "r" (&rw->lock), "r" (0)
 	: "cc");
+
+	dsb_sev();
 }
 
 /* write_can_lock - would write_trylock() succeed? */
@@ -188,14 +200,12 @@ static inline void arch_read_unlock(arch_rwlock_t *rw)
 "	strex	%1, %0, [%2]\n"
 "	teq	%1, #0\n"
 "	bne	1b"
-#ifdef CONFIG_CPU_32v6K
-"\n	cmp	%0, #0\n"
-"	mcreq   p15, 0, %0, c7, c10, 4\n"
-"	seveq"
-#endif
 	: "=&r" (tmp), "=&r" (tmp2)
 	: "r" (&rw->lock)
 	: "cc");
+
+	if (tmp == 0)
+		dsb_sev();
 }
 
 static inline int arch_read_trylock(arch_rwlock_t *rw)

arch/arm/include/asm/system.h

@@ -73,8 +73,7 @@ extern unsigned int mem_fclk_21285;
 
 struct pt_regs;
 
-void die(const char *msg, struct pt_regs *regs, int err)
-		__attribute__((noreturn));
+void die(const char *msg, struct pt_regs *regs, int err);
 
 struct siginfo;
 void arm_notify_die(const char *str, struct pt_regs *regs, struct siginfo *info,

arch/arm/include/asm/thread_info.h

@@ -115,7 +115,8 @@ extern void iwmmxt_task_restore(struct thread_info *, void *);
 extern void iwmmxt_task_release(struct thread_info *);
 extern void iwmmxt_task_switch(struct thread_info *);
 
-extern void vfp_sync_state(struct thread_info *thread);
+extern void vfp_sync_hwstate(struct thread_info *);
+extern void vfp_flush_hwstate(struct thread_info *);
 
 #endif
 

arch/arm/kernel/Makefile

@@ -17,6 +17,7 @@ obj-y		:= compat.o elf.o entry-armv.o entry-common.o irq.o \
 		   process.o ptrace.o return_address.o setup.o signal.o \
 		   sys_arm.o stacktrace.o time.o traps.o
 
+obj-$(CONFIG_LEDS)		+= leds.o
 obj-$(CONFIG_OC_ETM)		+= etm.o
 
 obj-$(CONFIG_ISA_DMA_API)	+= dma.o

arch/arm/kernel/leds.c

@@ -0,0 +1,115 @@
+/*
+ * LED support code, ripped out of arch/arm/kernel/time.c
+ *
+ *  Copyright (C) 1994-2001 Russell King
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/sysdev.h>
+
+#include <asm/leds.h>
+
+static void dummy_leds_event(led_event_t evt)
+{
+}
+
+void (*leds_event)(led_event_t) = dummy_leds_event;
+
+struct leds_evt_name {
+	const char	name[8];
+	int		on;
+	int		off;
+};
+
+static const struct leds_evt_name evt_names[] = {
+	{ "amber", led_amber_on, led_amber_off },
+	{ "blue",  led_blue_on,  led_blue_off  },
+	{ "green", led_green_on, led_green_off },
+	{ "red",   led_red_on,   led_red_off   },
+};
+
+static ssize_t leds_store(struct sys_device *dev,
+			struct sysdev_attribute *attr,
+			const char *buf, size_t size)
+{
+	int ret = -EINVAL, len = strcspn(buf, " ");
+
+	if (len > 0 && buf[len] == '\0')
+		len--;
+
+	if (strncmp(buf, "claim", len) == 0) {
+		leds_event(led_claim);
+		ret = size;
+	} else if (strncmp(buf, "release", len) == 0) {
+		leds_event(led_release);
+		ret = size;
+	} else {
+		int i;
+
+		for (i = 0; i < ARRAY_SIZE(evt_names); i++) {
+			if (strlen(evt_names[i].name) != len ||
+			    strncmp(buf, evt_names[i].name, len) != 0)
+				continue;
+			if (strncmp(buf+len, " on", 3) == 0) {
+				leds_event(evt_names[i].on);
+				ret = size;
+			} else if (strncmp(buf+len, " off", 4) == 0) {
+				leds_event(evt_names[i].off);
+				ret = size;
+			}
+			break;
+		}
+	}
+	return ret;
+}
+
+static SYSDEV_ATTR(event, 0200, NULL, leds_store);
+
+static int leds_suspend(struct sys_device *dev, pm_message_t state)
+{
+	leds_event(led_stop);
+	return 0;
+}
+
+static int leds_resume(struct sys_device *dev)
+{
+	leds_event(led_start);
+	return 0;
+}
+
+static int leds_shutdown(struct sys_device *dev)
+{
+	leds_event(led_halted);
+	return 0;
+}
+
+static struct sysdev_class leds_sysclass = {
+	.name		= "leds",
+	.shutdown	= leds_shutdown,
+	.suspend	= leds_suspend,
+	.resume		= leds_resume,
+};
+
+static struct sys_device leds_device = {
+	.id		= 0,
+	.cls		= &leds_sysclass,
+};
+
+static int __init leds_init(void)
+{
+	int ret;
+	ret = sysdev_class_register(&leds_sysclass);
+	if (ret == 0)
+		ret = sysdev_register(&leds_device);
+	if (ret == 0)
+		ret = sysdev_create_file(&leds_device, &attr_event);
+	return ret;
+}
+
+device_initcall(leds_init);
+
+EXPORT_SYMBOL(leds_event);

arch/arm/kernel/ptrace.c

@@ -499,10 +499,41 @@ static struct undef_hook thumb_break_hook = {
 	.fn		= break_trap,
 };
 
+static int thumb2_break_trap(struct pt_regs *regs, unsigned int instr)
+{
+	unsigned int instr2;
+	void __user *pc;
+
+	/* Check the second half of the instruction.  */
+	pc = (void __user *)(instruction_pointer(regs) + 2);
+
+	if (processor_mode(regs) == SVC_MODE) {
+		instr2 = *(u16 *) pc;
+	} else {
+		get_user(instr2, (u16 __user *)pc);
+	}
+
+	if (instr2 == 0xa000) {
+		ptrace_break(current, regs);
+		return 0;
+	} else {
+		return 1;
+	}
+}
+
+static struct undef_hook thumb2_break_hook = {
+	.instr_mask	= 0xffff,
+	.instr_val	= 0xf7f0,
+	.cpsr_mask	= PSR_T_BIT,
+	.cpsr_val	= PSR_T_BIT,
+	.fn		= thumb2_break_trap,
+};
+
 static int __init ptrace_break_init(void)
 {
 	register_undef_hook(&arm_break_hook);
 	register_undef_hook(&thumb_break_hook);
+	register_undef_hook(&thumb2_break_hook);
 	return 0;
 }
 
@@ -669,7 +700,7 @@ static int ptrace_getvfpregs(struct task_struct *tsk, void __user *data)
 	union vfp_state *vfp = &thread->vfpstate;
 	struct user_vfp __user *ufp = data;
 
-	vfp_sync_state(thread);
+	vfp_sync_hwstate(thread);
 
 	/* copy the floating point registers */
 	if (copy_to_user(&ufp->fpregs, &vfp->hard.fpregs,
@@ -692,7 +723,7 @@ static int ptrace_setvfpregs(struct task_struct *tsk, void __user *data)
 	union vfp_state *vfp = &thread->vfpstate;
 	struct user_vfp __user *ufp = data;
 
-	vfp_sync_state(thread);
+	vfp_sync_hwstate(thread);
 
 	/* copy the floating point registers */
 	if (copy_from_user(&vfp->hard.fpregs, &ufp->fpregs,
@@ -703,6 +734,8 @@ static int ptrace_setvfpregs(struct task_struct *tsk, void __user *data)
 	if (get_user(vfp->hard.fpscr, &ufp->fpscr))
 		return -EFAULT;
 
+	vfp_flush_hwstate(thread);
+
 	return 0;
 }
 #endif
@@ -712,26 +745,10 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 	int ret;
 
 	switch (request) {
-		/*
-		 * read word at location "addr" in the child process.
-		 */
-		case PTRACE_PEEKTEXT:
-		case PTRACE_PEEKDATA:
-			ret = generic_ptrace_peekdata(child, addr, data);
-			break;
-
 		case PTRACE_PEEKUSR:
 			ret = ptrace_read_user(child, addr, (unsigned long __user *)data);
 			break;
 
-		/*
-		 * write the word at location addr.
-		 */
-		case PTRACE_POKETEXT:
-		case PTRACE_POKEDATA:
-			ret = generic_ptrace_pokedata(child, addr, data);
-			break;
-
 		case PTRACE_POKEUSR:
 			ret = ptrace_write_user(child, addr, data);
 			break;

arch/arm/kernel/setup.c

@@ -24,6 +24,7 @@
 #include <linux/interrupt.h>
 #include <linux/smp.h>
 #include <linux/fs.h>
+#include <linux/proc_fs.h>
 
 #include <asm/unified.h>
 #include <asm/cpu.h>
@@ -117,7 +118,7 @@ EXPORT_SYMBOL(elf_platform);
 
 static const char *cpu_name;
 static const char *machine_name;
-static char __initdata command_line[COMMAND_LINE_SIZE];
+static char __initdata cmd_line[COMMAND_LINE_SIZE];
 
 static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE;
 static union { char c[4]; unsigned long l; } endian_test __initdata = { { 'l', '?', '?', 'b' } };
@@ -417,10 +418,11 @@ static int __init arm_add_memory(unsigned long start, unsigned long size)
  * Pick out the memory size.  We look for mem=size@start,
  * where start and size are "size[KkMm]"
  */
-static void __init early_mem(char **p)
+static int __init early_mem(char *p)
 {
 	static int usermem __initdata = 0;
 	unsigned long size, start;
+	char *endp;
 
 	/*
 	 * If the user specifies memory size, we
@@ -433,52 +435,15 @@ static void __init early_mem(char **p)
 	}
 
 	start = PHYS_OFFSET;
-	size  = memparse(*p, p);
-	if (**p == '@')
-		start = memparse(*p + 1, p);
+	size  = memparse(p, &endp);
+	if (*endp == '@')
+		start = memparse(endp + 1, NULL);
 
 	arm_add_memory(start, size);
-}
-__early_param("mem=", early_mem);
 
-/*
- * Initial parsing of the command line.
- */
-static void __init parse_cmdline(char **cmdline_p, char *from)
-{
-	char c = ' ', *to = command_line;
-	int len = 0;
-
-	for (;;) {
-		if (c == ' ') {
-			extern struct early_params __early_begin, __early_end;
-			struct early_params *p;
-
-			for (p = &__early_begin; p < &__early_end; p++) {
-				int arglen = strlen(p->arg);
-
-				if (memcmp(from, p->arg, arglen) == 0) {
-					if (to != command_line)
-						to -= 1;
-					from += arglen;
-					p->fn(&from);
-
-					while (*from != ' ' && *from != '\0')
-						from++;
-					break;
-				}
-			}
-		}
-		c = *from++;
-		if (!c)
-			break;
-		if (COMMAND_LINE_SIZE <= ++len)
-			break;
-		*to++ = c;
-	}
-	*to = '\0';
-	*cmdline_p = command_line;
+	return 0;
 }
+early_param("mem", early_mem);
 
 static void __init
 setup_ramdisk(int doload, int prompt, int image_start, unsigned int rd_sz)
@@ -739,9 +704,15 @@ void __init setup_arch(char **cmdline_p)
 	init_mm.end_data   = (unsigned long) _edata;
 	init_mm.brk	   = (unsigned long) _end;
 
-	memcpy(boot_command_line, from, COMMAND_LINE_SIZE);
-	boot_command_line[COMMAND_LINE_SIZE-1] = '\0';
-	parse_cmdline(cmdline_p, from);
+	/* parse_early_param needs a boot_command_line */
+	strlcpy(boot_command_line, from, COMMAND_LINE_SIZE);
+
+	/* populate cmd_line too for later use, preserving boot_command_line */
+	strlcpy(cmd_line, boot_command_line, COMMAND_LINE_SIZE);
+	*cmdline_p = cmd_line;
+
+	parse_early_param();
+
 	paging_init(mdesc);
 	request_standard_resources(&meminfo, mdesc);
 
@@ -782,9 +753,21 @@ static int __init topology_init(void)
 
 	return 0;
 }
-
 subsys_initcall(topology_init);
 
+#ifdef CONFIG_HAVE_PROC_CPU
+static int __init proc_cpu_init(void)
+{
+	struct proc_dir_entry *res;
+
+	res = proc_mkdir("cpu", NULL);
+	if (!res)
+		return -ENOMEM;
+	return 0;
+}
+fs_initcall(proc_cpu_init);
+#endif
+
 static const char *hwcap_str[] = {
 	"swp",
 	"half",

arch/arm/kernel/time.c

@@ -10,11 +10,6 @@
  *
  *  This file contains the ARM-specific time handling details:
  *  reading the RTC at bootup, etc...
- *
- *  1994-07-02  Alan Modra
- *              fixed set_rtc_mmss, fixed time.year for >= 2000, new mktime
- *  1998-12-20  Updated NTP code according to technical memorandum Jan '96
- *              "A Kernel Model for Precision Timekeeping" by Dave Mills
  */
 #include <linux/module.h>
 #include <linux/kernel.h>
@@ -77,11 +72,6 @@ unsigned long profile_pc(struct pt_regs *regs)
 EXPORT_SYMBOL(profile_pc);
 #endif
 
-/*
- * hook for setting the RTC's idea of the current time.
- */
-int (*set_rtc)(void);
-
 #ifndef CONFIG_GENERIC_TIME
 static unsigned long dummy_gettimeoffset(void)
 {
@@ -89,140 +79,6 @@ static unsigned long dummy_gettimeoffset(void)
 }
 #endif
 
-static unsigned long next_rtc_update;
-
-/*
- * If we have an externally synchronized linux clock, then update
- * CMOS clock accordingly every ~11 minutes.  set_rtc() has to be
- * called as close as possible to 500 ms before the new second
- * starts.
- */
-static inline void do_set_rtc(void)
-{
-	if (!ntp_synced() || set_rtc == NULL)
-		return;
-
-	if (next_rtc_update &&
-	    time_before((unsigned long)xtime.tv_sec, next_rtc_update))
-		return;
-
-	if (xtime.tv_nsec < 500000000 - ((unsigned) tick_nsec >> 1) &&
-	    xtime.tv_nsec >= 500000000 + ((unsigned) tick_nsec >> 1))
-		return;
-
-	if (set_rtc())
-		/*
-		 * rtc update failed.  Try again in 60s
-		 */
-		next_rtc_update = xtime.tv_sec + 60;
-	else
-		next_rtc_update = xtime.tv_sec + 660;
-}
-
-#ifdef CONFIG_LEDS
-
-static void dummy_leds_event(led_event_t evt)
-{
-}
-
-void (*leds_event)(led_event_t) = dummy_leds_event;
-
-struct leds_evt_name {
-	const char	name[8];
-	int		on;
-	int		off;
-};
-
-static const struct leds_evt_name evt_names[] = {
-	{ "amber", led_amber_on, led_amber_off },
-	{ "blue",  led_blue_on,  led_blue_off  },
-	{ "green", led_green_on, led_green_off },
-	{ "red",   led_red_on,   led_red_off   },
-};
-
-static ssize_t leds_store(struct sys_device *dev,
-			struct sysdev_attribute *attr,
-			const char *buf, size_t size)
-{
-	int ret = -EINVAL, len = strcspn(buf, " ");
-
-	if (len > 0 && buf[len] == '\0')
-		len--;
-
-	if (strncmp(buf, "claim", len) == 0) {
-		leds_event(led_claim);
-		ret = size;
-	} else if (strncmp(buf, "release", len) == 0) {
-		leds_event(led_release);
-		ret = size;
-	} else {
-		int i;
-
-		for (i = 0; i < ARRAY_SIZE(evt_names); i++) {
-			if (strlen(evt_names[i].name) != len ||
-			    strncmp(buf, evt_names[i].name, len) != 0)
-				continue;
-			if (strncmp(buf+len, " on", 3) == 0) {
-				leds_event(evt_names[i].on);
-				ret = size;
-			} else if (strncmp(buf+len, " off", 4) == 0) {
-				leds_event(evt_names[i].off);
-				ret = size;
-			}
-			break;
-		}
-	}
-	return ret;
-}
-
-static SYSDEV_ATTR(event, 0200, NULL, leds_store);
-
-static int leds_suspend(struct sys_device *dev, pm_message_t state)
-{
-	leds_event(led_stop);
-	return 0;
-}
-
-static int leds_resume(struct sys_device *dev)
-{
-	leds_event(led_start);
-	return 0;
-}
-
-static int leds_shutdown(struct sys_device *dev)
-{
-	leds_event(led_halted);
-	return 0;
-}
-
-static struct sysdev_class leds_sysclass = {
-	.name		= "leds",
-	.shutdown	= leds_shutdown,
-	.suspend	= leds_suspend,
-	.resume		= leds_resume,
-};
-
-static struct sys_device leds_device = {
-	.id		= 0,
-	.cls		= &leds_sysclass,
-};
-
-static int __init leds_init(void)
-{
-	int ret;
-	ret = sysdev_class_register(&leds_sysclass);
-	if (ret == 0)
-		ret = sysdev_register(&leds_device);
-	if (ret == 0)
-		ret = sysdev_create_file(&leds_device, &attr_event);
-	return ret;
-}
-
-device_initcall(leds_init);
-
-EXPORT_SYMBOL(leds_event);
-#endif
-
 #ifdef CONFIG_LEDS_TIMER
 static inline void do_leds(void)
 {
@@ -295,39 +151,6 @@ int do_settimeofday(struct timespec *tv)
 EXPORT_SYMBOL(do_settimeofday);
 #endif /* !CONFIG_GENERIC_TIME */
 
-/**
- * save_time_delta - Save the offset between system time and RTC time
- * @delta: pointer to timespec to store delta
- * @rtc: pointer to timespec for current RTC time
- *
- * Return a delta between the system time and the RTC time, such
- * that system time can be restored later with restore_time_delta()
- */
-void save_time_delta(struct timespec *delta, struct timespec *rtc)
-{
-	set_normalized_timespec(delta,
-				xtime.tv_sec - rtc->tv_sec,
-				xtime.tv_nsec - rtc->tv_nsec);
-}
-EXPORT_SYMBOL(save_time_delta);
-
-/**
- * restore_time_delta - Restore the current system time
- * @delta: delta returned by save_time_delta()
- * @rtc: pointer to timespec for current RTC time
- */
-void restore_time_delta(struct timespec *delta, struct timespec *rtc)
-{
-	struct timespec ts;
-
-	set_normalized_timespec(&ts,
-				delta->tv_sec + rtc->tv_sec,
-				delta->tv_nsec + rtc->tv_nsec);
-
-	do_settimeofday(&ts);
-}
-EXPORT_SYMBOL(restore_time_delta);
-
 #ifndef CONFIG_GENERIC_CLOCKEVENTS
 /*
  * Kernel system timer support.
@@ -336,7 +159,6 @@ void timer_tick(void)
 {
 	profile_tick(CPU_PROFILING);
 	do_leds();
-	do_set_rtc();
 	write_seqlock(&xtime_lock);
 	do_timer(1);
 	write_sequnlock(&xtime_lock);

arch/arm/kernel/traps.c

@@ -12,15 +12,17 @@
  *  'linux/arch/arm/lib/traps.S'.  Mostly a debugging aid, but will probably
  *  kill the offending process.
  */
-#include <linux/module.h>
 #include <linux/signal.h>
-#include <linux/spinlock.h>
 #include <linux/personality.h>
 #include <linux/kallsyms.h>
-#include <linux/delay.h>
+#include <linux/spinlock.h>
+#include <linux/uaccess.h>
 #include <linux/hardirq.h>
+#include <linux/kdebug.h>
+#include <linux/module.h>
+#include <linux/kexec.h>
+#include <linux/delay.h>
 #include <linux/init.h>
-#include <linux/uaccess.h>
 
 #include <asm/atomic.h>
 #include <asm/cacheflush.h>
@@ -224,14 +226,21 @@ void show_stack(struct task_struct *tsk, unsigned long *sp)
 #define S_SMP ""
 #endif
 
-static void __die(const char *str, int err, struct thread_info *thread, struct pt_regs *regs)
+static int __die(const char *str, int err, struct thread_info *thread, struct pt_regs *regs)
 {
 	struct task_struct *tsk = thread->task;
 	static int die_counter;
+	int ret;
 
 	printk(KERN_EMERG "Internal error: %s: %x [#%d]" S_PREEMPT S_SMP "\n",
 	       str, err, ++die_counter);
 	sysfs_printk_last_file();
+
+	/* trap and error numbers are mostly meaningless on ARM */
+	ret = notify_die(DIE_OOPS, str, regs, err, tsk->thread.trap_no, SIGSEGV);
+	if (ret == NOTIFY_STOP)
+		return ret;
+
 	print_modules();
 	__show_regs(regs);
 	printk(KERN_EMERG "Process %.*s (pid: %d, stack limit = 0x%p)\n",
@@ -243,6 +252,8 @@ static void __die(const char *str, int err, struct thread_info *thread, struct p
 		dump_backtrace(regs, tsk);
 		dump_instr(KERN_EMERG, regs);
 	}
+
+	return ret;
 }
 
 DEFINE_SPINLOCK(die_lock);
@@ -250,16 +261,21 @@ DEFINE_SPINLOCK(die_lock);
 /*
  * This function is protected against re-entrancy.
  */
-NORET_TYPE void die(const char *str, struct pt_regs *regs, int err)
+void die(const char *str, struct pt_regs *regs, int err)
 {
 	struct thread_info *thread = current_thread_info();
+	int ret;
 
 	oops_enter();
 
 	spin_lock_irq(&die_lock);
 	console_verbose();
 	bust_spinlocks(1);
-	__die(str, err, thread, regs);
+	ret = __die(str, err, thread, regs);
+
+	if (regs && kexec_should_crash(thread->task))
+		crash_kexec(regs);
+
 	bust_spinlocks(0);
 	add_taint(TAINT_DIE);
 	spin_unlock_irq(&die_lock);
@@ -267,11 +283,10 @@ NORET_TYPE void die(const char *str, struct pt_regs *regs, int err)
 
 	if (in_interrupt())
 		panic("Fatal exception in interrupt");
-
 	if (panic_on_oops)
 		panic("Fatal exception");
-
-	do_exit(SIGSEGV);
+	if (ret != NOTIFY_STOP)
+		do_exit(SIGSEGV);
 }
 
 void arm_notify_die(const char *str, struct pt_regs *regs,

arch/arm/kernel/vmlinux.lds.S

@@ -43,10 +43,6 @@ SECTIONS
 
 		INIT_SETUP(16)
 
-		__early_begin = .;
-			*(.early_param.init)
-		__early_end = .;
-
 		INIT_CALLS
 		CON_INITCALL
 		SECURITY_INITCALL

arch/arm/mach-davinci/include/mach/hardware.h

@@ -27,7 +27,7 @@
 /*
  * I/O mapping
  */
-#define IO_PHYS				0x01c00000
+#define IO_PHYS				0x01c00000UL
 #define IO_OFFSET			0xfd000000 /* Virtual IO = 0xfec00000 */
 #define IO_SIZE				0x00400000
 #define IO_VIRT				(IO_PHYS + IO_OFFSET)

arch/arm/mach-davinci/io.c

@@ -24,7 +24,7 @@ void __iomem *davinci_ioremap(unsigned long p, size_t size, unsigned int type)
 	if (BETWEEN(p, IO_PHYS, IO_SIZE))
 		return XLATE(p, IO_PHYS, IO_VIRT);
 
-	return __arm_ioremap(p, size, type);
+	return __arm_ioremap_caller(p, size, type, __builtin_return_address(0));
 }
 EXPORT_SYMBOL(davinci_ioremap);
 

arch/arm/mach-dove/include/mach/vmalloc.h

@@ -2,4 +2,4 @@
  * arch/arm/mach-dove/include/mach/vmalloc.h
  */
 
-#define VMALLOC_END	0xfd800000
+#define VMALLOC_END	0xfd800000UL

arch/arm/mach-ep93xx/include/mach/vmalloc.h

@@ -2,4 +2,4 @@
  * arch/arm/mach-ep93xx/include/mach/vmalloc.h
  */
 
-#define VMALLOC_END	0xfe800000
+#define VMALLOC_END	0xfe800000UL

arch/arm/mach-footbridge/common.c

@@ -32,12 +32,13 @@ unsigned int mem_fclk_21285 = 50000000;
 
 EXPORT_SYMBOL(mem_fclk_21285);
 
-static void __init early_fclk(char **arg)
+static int __init early_fclk(char *arg)
 {
-	mem_fclk_21285 = simple_strtoul(*arg, arg, 0);
+	mem_fclk_21285 = simple_strtoul(arg, NULL, 0);
+	return 0;
 }
 
-__early_param("mem_fclk_21285=", early_fclk);
+early_param("mem_fclk_21285", early_fclk);
 
 static int __init parse_tag_memclk(const struct tag *tag)
 {

arch/arm/mach-gemini/include/mach/vmalloc.h

@@ -7,4 +7,4 @@
  * (at your option) any later version.
  */
 
-#define VMALLOC_END	0xF0000000
+#define VMALLOC_END	0xf0000000UL

arch/arm/mach-iop13xx/io.c

@@ -61,9 +61,9 @@ void * __iomem __iop13xx_ioremap(unsigned long cookie, size_t size,
 			         (cookie - IOP13XX_PCIE_LOWER_MEM_RA));
 		break;
 	case IOP13XX_PBI_LOWER_MEM_RA ... IOP13XX_PBI_UPPER_MEM_RA:
-		retval = __arm_ioremap(IOP13XX_PBI_LOWER_MEM_PA +
+		retval = __arm_ioremap_caller(IOP13XX_PBI_LOWER_MEM_PA +
 				       (cookie - IOP13XX_PBI_LOWER_MEM_RA),
-				       size, mtype);
+				       size, mtype, __builtin_return_address(0));
 		break;
 	case IOP13XX_PCIE_LOWER_IO_PA ... IOP13XX_PCIE_UPPER_IO_PA:
 		retval = (void *) IOP13XX_PCIE_IO_PHYS_TO_VIRT(cookie);
@@ -75,7 +75,8 @@ void * __iomem __iop13xx_ioremap(unsigned long cookie, size_t size,
 		retval = (void *) IOP13XX_PMMR_PHYS_TO_VIRT(cookie);
 		break;
 	default:
-		retval = __arm_ioremap(cookie, size, mtype);
+		retval = __arm_ioremap_caller(cookie, size, mtype,
+				__builtin_return_address(0));
 	}
 
 	return retval;

arch/arm/mach-iop32x/include/mach/vmalloc.h

@@ -2,4 +2,4 @@
  * arch/arm/mach-iop32x/include/mach/vmalloc.h
  */
 
-#define VMALLOC_END	0xfe000000
+#define VMALLOC_END	0xfe000000UL

arch/arm/mach-iop33x/include/mach/vmalloc.h

@@ -2,4 +2,4 @@
  * arch/arm/mach-iop33x/include/mach/vmalloc.h
  */
 
-#define VMALLOC_END	0xfe000000
+#define VMALLOC_END	0xfe000000UL

arch/arm/mach-ixp2000/include/mach/vmalloc.h

@@ -17,4 +17,4 @@
  * The vmalloc() routines leaves a hole of 4kB between each vmalloced
  * area for the same reason. ;)
  */
-#define VMALLOC_END	    0xfb000000
+#define VMALLOC_END	    0xfb000000UL

arch/arm/mach-ixp23xx/include/mach/vmalloc.h

@@ -7,4 +7,4 @@
  * specific static I/O.
  */
 
-#define VMALLOC_END	(0xec000000)
+#define VMALLOC_END	(0xec000000UL)

arch/arm/mach-ixp4xx/include/mach/vmalloc.h

@@ -1,5 +1,5 @@
 /*
  * arch/arm/mach-ixp4xx/include/mach/vmalloc.h
  */
-#define VMALLOC_END       (0xFF000000)
+#define VMALLOC_END       (0xff000000UL)
 

arch/arm/mach-kirkwood/include/mach/vmalloc.h

@@ -2,4 +2,4 @@
  * arch/arm/mach-kirkwood/include/mach/vmalloc.h
  */
 
-#define VMALLOC_END	0xfe800000
+#define VMALLOC_END	0xfe800000UL

arch/arm/mach-lh7a40x/include/mach/vmalloc.h

@@ -7,4 +7,4 @@
  *  version 2 as published by the Free Software Foundation.
  *
  */
-#define VMALLOC_END       (0xe8000000)
+#define VMALLOC_END       (0xe8000000UL)

arch/arm/mach-loki/include/mach/vmalloc.h

@@ -2,4 +2,4 @@
  * arch/arm/mach-loki/include/mach/vmalloc.h
  */
 
-#define VMALLOC_END	0xfe800000
+#define VMALLOC_END	0xfe800000UL

arch/arm/mach-mmp/include/mach/vmalloc.h

@@ -2,4 +2,4 @@
  * linux/arch/arm/mach-mmp/include/mach/vmalloc.h
  */
 
-#define VMALLOC_END	0xfe000000
+#define VMALLOC_END	0xfe000000UL

arch/arm/mach-msm/io.c

@@ -76,5 +76,6 @@ __msm_ioremap(unsigned long phys_addr, size_t size, unsigned int mtype)
 			mtype = MT_DEVICE_NONSHARED;
 	}
 
-	return __arm_ioremap(phys_addr, size, mtype);
+	return __arm_ioremap_caller(phys_addr, size, mtype,
+		__builtin_return_address(0));
 }

arch/arm/mach-mv78xx0/include/mach/vmalloc.h

@@ -2,4 +2,4 @@
  * arch/arm/mach-mv78xx0/include/mach/vmalloc.h
  */
 
-#define VMALLOC_END	0xfe000000
+#define VMALLOC_END	0xfe000000UL

arch/arm/mach-nomadik/include/mach/vmalloc.h

@@ -1,2 +1,2 @@
 
-#define VMALLOC_END       0xe8000000
+#define VMALLOC_END       0xe8000000UL

arch/arm/mach-ns9xxx/include/mach/vmalloc.h

@@ -11,6 +11,6 @@
 #ifndef __ASM_ARCH_VMALLOC_H
 #define __ASM_ARCH_VMALLOC_H
 
-#define VMALLOC_END     (0xf0000000)
+#define VMALLOC_END     (0xf0000000UL)
 
 #endif /* ifndef __ASM_ARCH_VMALLOC_H */

arch/arm/mach-omap2/board-4430sdp.c

@@ -28,6 +28,7 @@
 #include <plat/control.h>
 #include <plat/timer-gp.h>
 #include <asm/hardware/gic.h>
+#include <asm/hardware/cache-l2x0.h>
 
 static struct platform_device sdp4430_lcd_device = {
 	.name		= "sdp4430_lcd",
@@ -50,6 +51,59 @@ static struct omap_board_config_kernel sdp4430_config[] __initdata = {
 	{ OMAP_TAG_LCD,		&sdp4430_lcd_config },
 };
 
+#ifdef CONFIG_CACHE_L2X0
+noinline void omap_smc1(u32 fn, u32 arg)
+{
+	register u32 r12 asm("r12") = fn;
+	register u32 r0 asm("r0") = arg;
+
+	/* This is common routine cache secure monitor API used to
+	 * modify the PL310 secure registers.
+	 * r0 contains the value to be modified and "r12" contains
+	 * the monitor API number. It uses few CPU registers
+	 * internally and hence they need be backed up including
+	 * link register "lr".
+	 * Explicitly save r11 and r12 the compiler generated code
+	 * won't save it.
+	 */
+	asm volatile(
+		"stmfd r13!, {r11,r12}\n"
+		"dsb\n"
+		"smc\n"
+		"ldmfd r13!, {r11,r12}\n"
+		: "+r" (r0), "+r" (r12)
+		:
+		: "r4", "r5", "r10", "lr", "cc");
+}
+EXPORT_SYMBOL(omap_smc1);
+
+static int __init omap_l2_cache_init(void)
+{
+	void __iomem *l2cache_base;
+
+	/* To avoid code running on other OMAPs in
+	 * multi-omap builds
+	 */
+	if (!cpu_is_omap44xx())
+		return -ENODEV;
+
+	/* Static mapping, never released */
+	l2cache_base = ioremap(OMAP44XX_L2CACHE_BASE, SZ_4K);
+	BUG_ON(!l2cache_base);
+
+	/* Enable PL310 L2 Cache controller */
+	omap_smc1(0x102, 0x1);
+
+	/* 32KB way size, 16-way associativity,
+	* parity disabled
+	*/
+	l2x0_init(l2cache_base, 0x0e050000, 0xc0000fff);
+
+	return 0;
+}
+early_initcall(omap_l2_cache_init);
+#endif
+
 static void __init gic_init_irq(void)
 {
 	void __iomem *base;

arch/arm/mach-orion5x/include/mach/vmalloc.h

@@ -2,4 +2,4 @@
  * arch/arm/mach-orion5x/include/mach/vmalloc.h
  */
 
-#define VMALLOC_END       0xfd800000
+#define VMALLOC_END       0xfd800000UL

arch/arm/mach-pxa/include/mach/vmalloc.h

@@ -8,4 +8,4 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
-#define VMALLOC_END       (0xe8000000)
+#define VMALLOC_END       (0xe8000000UL)

arch/arm/mach-realview/include/mach/vmalloc.h

@@ -18,4 +18,4 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
-#define VMALLOC_END		0xf8000000
+#define VMALLOC_END		0xf8000000UL

arch/arm/mach-s3c24a0/include/mach/vmalloc.h

@@ -12,6 +12,6 @@
 #ifndef __ASM_ARCH_VMALLOC_H
 #define __ASM_ARCH_VMALLOC_H
 
-#define VMALLOC_END	  (0xE0000000)
+#define VMALLOC_END	  (0xe0000000UL)
 
 #endif /* __ASM_ARCH_VMALLOC_H */

arch/arm/mach-sa1100/include/mach/vmalloc.h

@@ -1,4 +1,4 @@
 /*
  * arch/arm/mach-sa1100/include/mach/vmalloc.h
  */
-#define VMALLOC_END       (0xe8000000)
+#define VMALLOC_END       (0xe8000000UL)

arch/arm/mach-u300/include/mach/vmalloc.h

@@ -9,4 +9,4 @@
  * End must be above the I/O registers and on an even 2MiB boundary.
  * Author: Linus Walleij <linus.walleij@stericsson.com>
  */
-#define VMALLOC_END	0xfe800000
+#define VMALLOC_END	0xfe800000UL

arch/arm/mach-ux500/include/mach/vmalloc.h

@@ -15,4 +15,4 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
-#define VMALLOC_END	0xf0000000
+#define VMALLOC_END	0xf0000000UL

arch/arm/mach-w90x900/include/mach/vmalloc.h

@@ -18,6 +18,6 @@
 #ifndef __ASM_ARCH_VMALLOC_H
 #define __ASM_ARCH_VMALLOC_H
 
-#define VMALLOC_END	  (0xE0000000)
+#define VMALLOC_END	  (0xe0000000UL)
 
 #endif /* __ASM_ARCH_VMALLOC_H */

arch/arm/mm/Kconfig

@@ -399,7 +399,7 @@ config CPU_V6
 config CPU_32v6K
 	bool "Support ARM V6K processor extensions" if !SMP
 	depends on CPU_V6
-	default y if SMP && !ARCH_MX3
+	default y if SMP && !(ARCH_MX3 || ARCH_OMAP2)
 	help
 	  Say Y here if your ARMv6 processor supports the 'K' extension.
 	  This enables the kernel to use some instructions not present
@@ -410,7 +410,7 @@ config CPU_32v6K
 # ARMv7
 config CPU_V7
 	bool "Support ARM V7 processor" if ARCH_INTEGRATOR || MACH_REALVIEW_EB || MACH_REALVIEW_PBX
-	select CPU_32v6K
+	select CPU_32v6K if !ARCH_OMAP2
 	select CPU_32v7
 	select CPU_ABRT_EV7
 	select CPU_PABRT_V7
@@ -754,7 +754,7 @@ config CACHE_FEROCEON_L2_WRITETHROUGH
 config CACHE_L2X0
 	bool "Enable the L2x0 outer cache controller"
 	depends on REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || MACH_REALVIEW_PB1176 || \
-		   REALVIEW_EB_A9MP || ARCH_MX35 || ARCH_MX31 || MACH_REALVIEW_PBX || ARCH_NOMADIK
+		   REALVIEW_EB_A9MP || ARCH_MX35 || ARCH_MX31 || MACH_REALVIEW_PBX || ARCH_NOMADIK || ARCH_OMAP4
 	default y
 	select OUTER_CACHE
 	help
@@ -779,5 +779,5 @@ config CACHE_XSC3L2
 
 config ARM_L1_CACHE_SHIFT
 	int
-	default 6 if ARCH_OMAP3 || ARCH_S5PC1XX
+	default 6 if ARM_L1_CACHE_SHIFT_6
 	default 5

arch/arm/mm/alignment.c

@@ -898,11 +898,7 @@ static int __init alignment_init(void)
 #ifdef CONFIG_PROC_FS
 	struct proc_dir_entry *res;
 
-	res = proc_mkdir("cpu", NULL);
-	if (!res)
-		return -ENOMEM;
-
-	res = create_proc_entry("alignment", S_IWUSR | S_IRUGO, res);
+	res = create_proc_entry("cpu/alignment", S_IWUSR | S_IRUGO, NULL);
 	if (!res)
 		return -ENOMEM;
 

arch/arm/mm/cache-l2x0.c

@@ -42,6 +42,57 @@ static inline void cache_sync(void)
 	cache_wait(base + L2X0_CACHE_SYNC, 1);
 }
 
+static inline void l2x0_clean_line(unsigned long addr)
+{
+	void __iomem *base = l2x0_base;
+	cache_wait(base + L2X0_CLEAN_LINE_PA, 1);
+	writel(addr, base + L2X0_CLEAN_LINE_PA);
+}
+
+static inline void l2x0_inv_line(unsigned long addr)
+{
+	void __iomem *base = l2x0_base;
+	cache_wait(base + L2X0_INV_LINE_PA, 1);
+	writel(addr, base + L2X0_INV_LINE_PA);
+}
+
+#ifdef CONFIG_PL310_ERRATA_588369
+static void debug_writel(unsigned long val)
+{
+	extern void omap_smc1(u32 fn, u32 arg);
+
+	/*
+	 * Texas Instrument secure monitor api to modify the
+	 * PL310 Debug Control Register.
+	 */
+	omap_smc1(0x100, val);
+}
+
+static inline void l2x0_flush_line(unsigned long addr)
+{
+	void __iomem *base = l2x0_base;
+
+	/* Clean by PA followed by Invalidate by PA */
+	cache_wait(base + L2X0_CLEAN_LINE_PA, 1);
+	writel(addr, base + L2X0_CLEAN_LINE_PA);
+	cache_wait(base + L2X0_INV_LINE_PA, 1);
+	writel(addr, base + L2X0_INV_LINE_PA);
+}
+#else
+
+/* Optimised out for non-errata case */
+static inline void debug_writel(unsigned long val)
+{
+}
+
+static inline void l2x0_flush_line(unsigned long addr)
+{
+	void __iomem *base = l2x0_base;
+	cache_wait(base + L2X0_CLEAN_INV_LINE_PA, 1);
+	writel(addr, base + L2X0_CLEAN_INV_LINE_PA);
+}
+#endif
+
 static inline void l2x0_inv_all(void)
 {
 	unsigned long flags;
@@ -62,23 +113,24 @@ static void l2x0_inv_range(unsigned long start, unsigned long end)
 	spin_lock_irqsave(&l2x0_lock, flags);
 	if (start & (CACHE_LINE_SIZE - 1)) {
 		start &= ~(CACHE_LINE_SIZE - 1);
-		cache_wait(base + L2X0_CLEAN_INV_LINE_PA, 1);
-		writel(start, base + L2X0_CLEAN_INV_LINE_PA);
+		debug_writel(0x03);
+		l2x0_flush_line(start);
+		debug_writel(0x00);
 		start += CACHE_LINE_SIZE;
 	}
 
 	if (end & (CACHE_LINE_SIZE - 1)) {
 		end &= ~(CACHE_LINE_SIZE - 1);
-		cache_wait(base + L2X0_CLEAN_INV_LINE_PA, 1);
-		writel(end, base + L2X0_CLEAN_INV_LINE_PA);
+		debug_writel(0x03);
+		l2x0_flush_line(end);
+		debug_writel(0x00);
 	}
 
 	while (start < end) {
 		unsigned long blk_end = start + min(end - start, 4096UL);
 
 		while (start < blk_end) {
-			cache_wait(base + L2X0_INV_LINE_PA, 1);
-			writel(start, base + L2X0_INV_LINE_PA);
+			l2x0_inv_line(start);
 			start += CACHE_LINE_SIZE;
 		}
 
@@ -103,8 +155,7 @@ static void l2x0_clean_range(unsigned long start, unsigned long end)
 		unsigned long blk_end = start + min(end - start, 4096UL);
 
 		while (start < blk_end) {
-			cache_wait(base + L2X0_CLEAN_LINE_PA, 1);
-			writel(start, base + L2X0_CLEAN_LINE_PA);
+			l2x0_clean_line(start);
 			start += CACHE_LINE_SIZE;
 		}
 
@@ -128,11 +179,12 @@ static void l2x0_flush_range(unsigned long start, unsigned long end)
 	while (start < end) {
 		unsigned long blk_end = start + min(end - start, 4096UL);
 
+		debug_writel(0x03);
 		while (start < blk_end) {
-			cache_wait(base + L2X0_CLEAN_INV_LINE_PA, 1);
-			writel(start, base + L2X0_CLEAN_INV_LINE_PA);
+			l2x0_flush_line(start);
 			start += CACHE_LINE_SIZE;
 		}
+		debug_writel(0x00);
 
 		if (blk_end < end) {
 			spin_unlock_irqrestore(&l2x0_lock, flags);

arch/arm/mm/context.c

@@ -10,12 +10,17 @@
 #include <linux/init.h>
 #include <linux/sched.h>
 #include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/percpu.h>
 
 #include <asm/mmu_context.h>
 #include <asm/tlbflush.h>
 
 static DEFINE_SPINLOCK(cpu_asid_lock);
 unsigned int cpu_last_asid = ASID_FIRST_VERSION;
+#ifdef CONFIG_SMP
+DEFINE_PER_CPU(struct mm_struct *, current_mm);
+#endif
 
 /*
  * We fork()ed a process, and we need a new context for the child
@@ -26,13 +31,109 @@ unsigned int cpu_last_asid = ASID_FIRST_VERSION;
 void __init_new_context(struct task_struct *tsk, struct mm_struct *mm)
 {
 	mm->context.id = 0;
+	spin_lock_init(&mm->context.id_lock);
 }
 
+static void flush_context(void)
+{
+	/* set the reserved ASID before flushing the TLB */
+	asm("mcr	p15, 0, %0, c13, c0, 1\n" : : "r" (0));
+	isb();
+	local_flush_tlb_all();
+	if (icache_is_vivt_asid_tagged()) {
+		__flush_icache_all();
+		dsb();
+	}
+}
+
+#ifdef CONFIG_SMP
+
+static void set_mm_context(struct mm_struct *mm, unsigned int asid)
+{
+	unsigned long flags;
+
+	/*
+	 * Locking needed for multi-threaded applications where the
+	 * same mm->context.id could be set from different CPUs during
+	 * the broadcast. This function is also called via IPI so the
+	 * mm->context.id_lock has to be IRQ-safe.
+	 */
+	spin_lock_irqsave(&mm->context.id_lock, flags);
+	if (likely((mm->context.id ^ cpu_last_asid) >> ASID_BITS)) {
+		/*
+		 * Old version of ASID found. Set the new one and
+		 * reset mm_cpumask(mm).
+		 */
+		mm->context.id = asid;
+		cpumask_clear(mm_cpumask(mm));
+	}
+	spin_unlock_irqrestore(&mm->context.id_lock, flags);
+
+	/*
+	 * Set the mm_cpumask(mm) bit for the current CPU.
+	 */
+	cpumask_set_cpu(smp_processor_id(), mm_cpumask(mm));
+}
+
+/*
+ * Reset the ASID on the current CPU. This function call is broadcast
+ * from the CPU handling the ASID rollover and holding cpu_asid_lock.
+ */
+static void reset_context(void *info)
+{
+	unsigned int asid;
+	unsigned int cpu = smp_processor_id();
+	struct mm_struct *mm = per_cpu(current_mm, cpu);
+
+	/*
+	 * Check if a current_mm was set on this CPU as it might still
+	 * be in the early booting stages and using the reserved ASID.
+	 */
+	if (!mm)
+		return;
+
+	smp_rmb();
+	asid = cpu_last_asid + cpu + 1;
+
+	flush_context();
+	set_mm_context(mm, asid);
+
+	/* set the new ASID */
+	asm("mcr	p15, 0, %0, c13, c0, 1\n" : : "r" (mm->context.id));
+	isb();
+}
+
+#else
+
+static inline void set_mm_context(struct mm_struct *mm, unsigned int asid)
+{
+	mm->context.id = asid;
+	cpumask_copy(mm_cpumask(mm), cpumask_of(smp_processor_id()));
+}
+
+#endif
+
 void __new_context(struct mm_struct *mm)
 {
 	unsigned int asid;
 
 	spin_lock(&cpu_asid_lock);
+#ifdef CONFIG_SMP
+	/*
+	 * Check the ASID again, in case the change was broadcast from
+	 * another CPU before we acquired the lock.
+	 */
+	if (unlikely(((mm->context.id ^ cpu_last_asid) >> ASID_BITS) == 0)) {
+		cpumask_set_cpu(smp_processor_id(), mm_cpumask(mm));
+		spin_unlock(&cpu_asid_lock);
+		return;
+	}
+#endif
+	/*
+	 * At this point, it is guaranteed that the current mm (with
+	 * an old ASID) isn't active on any other CPU since the ASIDs
+	 * are changed simultaneously via IPI.
+	 */
 	asid = ++cpu_last_asid;
 	if (asid == 0)
 		asid = cpu_last_asid = ASID_FIRST_VERSION;
@@ -42,20 +143,15 @@ void __new_context(struct mm_struct *mm)
 	 * to start a new version and flush the TLB.
 	 */
 	if (unlikely((asid & ~ASID_MASK) == 0)) {
-		asid = ++cpu_last_asid;
-		/* set the reserved ASID before flushing the TLB */
-		asm("mcr	p15, 0, %0, c13, c0, 1	@ set reserved context ID\n"
-		    :
-		    : "r" (0));
-		isb();
-		flush_tlb_all();
-		if (icache_is_vivt_asid_tagged()) {
-			__flush_icache_all();
-			dsb();
-		}
+		asid = cpu_last_asid + smp_processor_id() + 1;
+		flush_context();
+#ifdef CONFIG_SMP
+		smp_wmb();
+		smp_call_function(reset_context, NULL, 1);
+#endif
+		cpu_last_asid += NR_CPUS;
 	}
-	spin_unlock(&cpu_asid_lock);
 
-	cpumask_copy(mm_cpumask(mm), cpumask_of(smp_processor_id()));
-	mm->context.id = asid;
+	set_mm_context(mm, asid);
+	spin_unlock(&cpu_asid_lock);
 }

arch/arm/mm/dma-mapping.c

@@ -29,9 +29,6 @@
 #error "CONSISTENT_DMA_SIZE must be multiple of 2MiB"
 #endif
 
-#define CONSISTENT_END	(0xffe00000)
-#define CONSISTENT_BASE	(CONSISTENT_END - CONSISTENT_DMA_SIZE)
-
 #define CONSISTENT_OFFSET(x)	(((unsigned long)(x) - CONSISTENT_BASE) >> PAGE_SHIFT)
 #define CONSISTENT_PTE_INDEX(x) (((unsigned long)(x) - CONSISTENT_BASE) >> PGDIR_SHIFT)
 #define NUM_CONSISTENT_PTES (CONSISTENT_DMA_SIZE >> PGDIR_SHIFT)

arch/arm/mm/init.c

@@ -23,6 +23,7 @@
 #include <asm/setup.h>
 #include <asm/sizes.h>
 #include <asm/tlb.h>
+#include <asm/fixmap.h>
 
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
@@ -32,19 +33,21 @@
 static unsigned long phys_initrd_start __initdata = 0;
 static unsigned long phys_initrd_size __initdata = 0;
 
-static void __init early_initrd(char **p)
+static int __init early_initrd(char *p)
 {
 	unsigned long start, size;
+	char *endp;
 
-	start = memparse(*p, p);
-	if (**p == ',') {
-		size = memparse((*p) + 1, p);
+	start = memparse(p, &endp);
+	if (*endp == ',') {
+		size = memparse(endp + 1, NULL);
 
 		phys_initrd_start = start;
 		phys_initrd_size = size;
 	}
+	return 0;
 }
-__early_param("initrd=", early_initrd);
+early_param("initrd", early_initrd);
 
 static int __init parse_tag_initrd(const struct tag *tag)
 {
@@ -560,7 +563,7 @@ static void __init free_unused_memmap_node(int node, struct meminfo *mi)
  */
 void __init mem_init(void)
 {
-	unsigned int codesize, datasize, initsize;
+	unsigned long reserved_pages, free_pages;
 	int i, node;
 
 #ifndef CONFIG_DISCONTIGMEM
@@ -596,6 +599,33 @@ void __init mem_init(void)
 	totalram_pages += totalhigh_pages;
 #endif
 
+	reserved_pages = free_pages = 0;
+
+	for_each_online_node(node) {
+		pg_data_t *n = NODE_DATA(node);
+		struct page *map = pgdat_page_nr(n, 0) - n->node_start_pfn;
+
+		for_each_nodebank(i, &meminfo, node) {
+			struct membank *bank = &meminfo.bank[i];
+			unsigned int pfn1, pfn2;
+			struct page *page, *end;
+
+			pfn1 = bank_pfn_start(bank);
+			pfn2 = bank_pfn_end(bank);
+
+			page = map + pfn1;
+			end  = map + pfn2;
+
+			do {
+				if (PageReserved(page))
+					reserved_pages++;
+				else if (!page_count(page))
+					free_pages++;
+				page++;
+			} while (page < end);
+		}
+	}
+
 	/*
 	 * Since our memory may not be contiguous, calculate the
 	 * real number of pages we have in this system
@@ -608,16 +638,71 @@ void __init mem_init(void)
 	}
 	printk(" = %luMB total\n", num_physpages >> (20 - PAGE_SHIFT));
 
-	codesize = _etext - _text;
-	datasize = _end - _data;
-	initsize = __init_end - __init_begin;
-
-	printk(KERN_NOTICE "Memory: %luKB available (%dK code, "
-		"%dK data, %dK init, %luK highmem)\n",
-		nr_free_pages() << (PAGE_SHIFT-10), codesize >> 10,
-		datasize >> 10, initsize >> 10,
+	printk(KERN_NOTICE "Memory: %luk/%luk available, %luk reserved, %luK highmem\n",
+		nr_free_pages() << (PAGE_SHIFT-10),
+		free_pages << (PAGE_SHIFT-10),
+		reserved_pages << (PAGE_SHIFT-10),
 		totalhigh_pages << (PAGE_SHIFT-10));
 
+#define MLK(b, t) b, t, ((t) - (b)) >> 10
+#define MLM(b, t) b, t, ((t) - (b)) >> 20
+#define MLK_ROUNDUP(b, t) b, t, DIV_ROUND_UP(((t) - (b)), SZ_1K)
+
+	printk(KERN_NOTICE "Virtual kernel memory layout:\n"
+			"    vector  : 0x%08lx - 0x%08lx   (%4ld kB)\n"
+			"    fixmap  : 0x%08lx - 0x%08lx   (%4ld kB)\n"
+#ifdef CONFIG_MMU
+			"    DMA     : 0x%08lx - 0x%08lx   (%4ld MB)\n"
+#endif
+			"    vmalloc : 0x%08lx - 0x%08lx   (%4ld MB)\n"
+			"    lowmem  : 0x%08lx - 0x%08lx   (%4ld MB)\n"
+#ifdef CONFIG_HIGHMEM
+			"    pkmap   : 0x%08lx - 0x%08lx   (%4ld MB)\n"
+#endif
+			"    modules : 0x%08lx - 0x%08lx   (%4ld MB)\n"
+			"      .init : 0x%p" " - 0x%p" "   (%4d kB)\n"
+			"      .text : 0x%p" " - 0x%p" "   (%4d kB)\n"
+			"      .data : 0x%p" " - 0x%p" "   (%4d kB)\n",
+
+			MLK(UL(CONFIG_VECTORS_BASE), UL(CONFIG_VECTORS_BASE) +
+				(PAGE_SIZE)),
+			MLK(FIXADDR_START, FIXADDR_TOP),
+#ifdef CONFIG_MMU
+			MLM(CONSISTENT_BASE, CONSISTENT_END),
+#endif
+			MLM(VMALLOC_START, VMALLOC_END),
+			MLM(PAGE_OFFSET, (unsigned long)high_memory),
+#ifdef CONFIG_HIGHMEM
+			MLM(PKMAP_BASE, (PKMAP_BASE) + (LAST_PKMAP) *
+				(PAGE_SIZE)),
+#endif
+			MLM(MODULES_VADDR, MODULES_END),
+
+			MLK_ROUNDUP(__init_begin, __init_end),
+			MLK_ROUNDUP(_text, _etext),
+			MLK_ROUNDUP(_data, _edata));
+
+#undef MLK
+#undef MLM
+#undef MLK_ROUNDUP
+
+	/*
+	 * Check boundaries twice: Some fundamental inconsistencies can
+	 * be detected at build time already.
+	 */
+#ifdef CONFIG_MMU
+	BUILD_BUG_ON(VMALLOC_END			> CONSISTENT_BASE);
+	BUG_ON(VMALLOC_END				> CONSISTENT_BASE);
+
+	BUILD_BUG_ON(TASK_SIZE				> MODULES_VADDR);
+	BUG_ON(TASK_SIZE 				> MODULES_VADDR);
+#endif
+
+#ifdef CONFIG_HIGHMEM
+	BUILD_BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > PAGE_OFFSET);
+	BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE	> PAGE_OFFSET);
+#endif
+
 	if (PAGE_SIZE >= 16384 && num_physpages <= 128) {
 		extern int sysctl_overcommit_memory;
 		/*

arch/arm/mm/ioremap.c

@@ -139,8 +139,8 @@ void __check_kvm_seq(struct mm_struct *mm)
  * which requires the new ioremap'd region to be referenced, the CPU will
  * reference the _old_ region.
  *
- * Note that get_vm_area() allocates a guard 4K page, so we need to mask
- * the size back to 1MB aligned or we will overflow in the loop below.
+ * Note that get_vm_area_caller() allocates a guard 4K page, so we need to
+ * mask the size back to 1MB aligned or we will overflow in the loop below.
  */
 static void unmap_area_sections(unsigned long virt, unsigned long size)
 {
@@ -254,22 +254,8 @@ remap_area_supersections(unsigned long virt, unsigned long pfn,
 }
 #endif
 
-
-/*
- * Remap an arbitrary physical address space into the kernel virtual
- * address space. Needed when the kernel wants to access high addresses
- * directly.
- *
- * NOTE! We need to allow non-page-aligned mappings too: we will obviously
- * have to convert them into an offset in a page-aligned mapping, but the
- * caller shouldn't need to know that small detail.
- *
- * 'flags' are the extra L_PTE_ flags that you want to specify for this
- * mapping.  See <asm/pgtable.h> for more information.
- */
-void __iomem *
-__arm_ioremap_pfn(unsigned long pfn, unsigned long offset, size_t size,
-		  unsigned int mtype)
+void __iomem * __arm_ioremap_pfn_caller(unsigned long pfn,
+	unsigned long offset, size_t size, unsigned int mtype, void *caller)
 {
 	const struct mem_type *type;
 	int err;
@@ -291,7 +277,7 @@ __arm_ioremap_pfn(unsigned long pfn, unsigned long offset, size_t size,
 	 */
 	size = PAGE_ALIGN(offset + size);
 
- 	area = get_vm_area(size, VM_IOREMAP);
+	area = get_vm_area_caller(size, VM_IOREMAP, caller);
  	if (!area)
  		return NULL;
  	addr = (unsigned long)area->addr;
@@ -318,10 +304,9 @@ __arm_ioremap_pfn(unsigned long pfn, unsigned long offset, size_t size,
 	flush_cache_vmap(addr, addr + size);
 	return (void __iomem *) (offset + addr);
 }
-EXPORT_SYMBOL(__arm_ioremap_pfn);
 
-void __iomem *
-__arm_ioremap(unsigned long phys_addr, size_t size, unsigned int mtype)
+void __iomem *__arm_ioremap_caller(unsigned long phys_addr, size_t size,
+	unsigned int mtype, void *caller)
 {
 	unsigned long last_addr;
  	unsigned long offset = phys_addr & ~PAGE_MASK;
@@ -334,7 +319,33 @@ __arm_ioremap(unsigned long phys_addr, size_t size, unsigned int mtype)
 	if (!size || last_addr < phys_addr)
 		return NULL;
 
- 	return __arm_ioremap_pfn(pfn, offset, size, mtype);
+	return __arm_ioremap_pfn_caller(pfn, offset, size, mtype,
+			caller);
+}
+
+/*
+ * Remap an arbitrary physical address space into the kernel virtual
+ * address space. Needed when the kernel wants to access high addresses
+ * directly.
+ *
+ * NOTE! We need to allow non-page-aligned mappings too: we will obviously
+ * have to convert them into an offset in a page-aligned mapping, but the
+ * caller shouldn't need to know that small detail.
+ */
+void __iomem *
+__arm_ioremap_pfn(unsigned long pfn, unsigned long offset, size_t size,
+		  unsigned int mtype)
+{
+	return __arm_ioremap_pfn_caller(pfn, offset, size, mtype,
+			__builtin_return_address(0));
+}
+EXPORT_SYMBOL(__arm_ioremap_pfn);
+
+void __iomem *
+__arm_ioremap(unsigned long phys_addr, size_t size, unsigned int mtype)
+{
+	return __arm_ioremap_caller(phys_addr, size, mtype,
+			__builtin_return_address(0));
 }
 EXPORT_SYMBOL(__arm_ioremap);
 

arch/arm/mm/mmu.c

@@ -100,18 +100,17 @@ static struct cachepolicy cache_policies[] __initdata = {
  * writebuffer to be turned off.  (Note: the write
  * buffer should not be on and the cache off).
  */
-static void __init early_cachepolicy(char **p)
+static int __init early_cachepolicy(char *p)
 {
 	int i;
 
 	for (i = 0; i < ARRAY_SIZE(cache_policies); i++) {
 		int len = strlen(cache_policies[i].policy);
 
-		if (memcmp(*p, cache_policies[i].policy, len) == 0) {
+		if (memcmp(p, cache_policies[i].policy, len) == 0) {
 			cachepolicy = i;
 			cr_alignment &= ~cache_policies[i].cr_mask;
 			cr_no_alignment &= ~cache_policies[i].cr_mask;
-			*p += len;
 			break;
 		}
 	}
@@ -130,36 +129,37 @@ static void __init early_cachepolicy(char **p)
 	}
 	flush_cache_all();
 	set_cr(cr_alignment);
+	return 0;
 }
-__early_param("cachepolicy=", early_cachepolicy);
+early_param("cachepolicy", early_cachepolicy);
 
-static void __init early_nocache(char **__unused)
+static int __init early_nocache(char *__unused)
 {
 	char *p = "buffered";
 	printk(KERN_WARNING "nocache is deprecated; use cachepolicy=%s\n", p);
-	early_cachepolicy(&p);
+	early_cachepolicy(p);
+	return 0;
 }
-__early_param("nocache", early_nocache);
+early_param("nocache", early_nocache);
 
-static void __init early_nowrite(char **__unused)
+static int __init early_nowrite(char *__unused)
 {
 	char *p = "uncached";
 	printk(KERN_WARNING "nowb is deprecated; use cachepolicy=%s\n", p);
-	early_cachepolicy(&p);
+	early_cachepolicy(p);
+	return 0;
 }
-__early_param("nowb", early_nowrite);
+early_param("nowb", early_nowrite);
 
-static void __init early_ecc(char **p)
+static int __init early_ecc(char *p)
 {
-	if (memcmp(*p, "on", 2) == 0) {
+	if (memcmp(p, "on", 2) == 0)
 		ecc_mask = PMD_PROTECTION;
-		*p += 2;
-	} else if (memcmp(*p, "off", 3) == 0) {
+	else if (memcmp(p, "off", 3) == 0)
 		ecc_mask = 0;
-		*p += 3;
-	}
+	return 0;
 }
-__early_param("ecc=", early_ecc);
+early_param("ecc", early_ecc);
 
 static int __init noalign_setup(char *__unused)
 {
@@ -670,9 +670,9 @@ static unsigned long __initdata vmalloc_reserve = SZ_128M;
  * bytes. This can be used to increase (or decrease) the vmalloc
  * area - the default is 128m.
  */
-static void __init early_vmalloc(char **arg)
+static int __init early_vmalloc(char *arg)
 {
-	vmalloc_reserve = memparse(*arg, arg);
+	vmalloc_reserve = memparse(arg, NULL);
 
 	if (vmalloc_reserve < SZ_16M) {
 		vmalloc_reserve = SZ_16M;
@@ -687,8 +687,9 @@ static void __init early_vmalloc(char **arg)
 			"vmalloc area is too big, limiting to %luMB\n",
 			vmalloc_reserve >> 20);
 	}
+	return 0;
 }
-__early_param("vmalloc=", early_vmalloc);
+early_param("vmalloc", early_vmalloc);
 
 #define VMALLOC_MIN	(void *)(VMALLOC_END - vmalloc_reserve)
 

arch/arm/mm/nommu.c

@@ -74,6 +74,12 @@ void __iomem *__arm_ioremap_pfn(unsigned long pfn, unsigned long offset,
 }
 EXPORT_SYMBOL(__arm_ioremap_pfn);
 
+void __iomem *__arm_ioremap_pfn_caller(unsigned long pfn, unsigned long offset,
+			   size_t size, unsigned int mtype, void *caller)
+{
+	return __arm_ioremap_pfn(pfn, offset, size, mtype);
+}
+
 void __iomem *__arm_ioremap(unsigned long phys_addr, size_t size,
 			    unsigned int mtype)
 {
@@ -81,6 +87,12 @@ void __iomem *__arm_ioremap(unsigned long phys_addr, size_t size,
 }
 EXPORT_SYMBOL(__arm_ioremap);
 
+void __iomem *__arm_ioremap(unsigned long phys_addr, size_t size,
+			    unsigned int mtype, void *caller)
+{
+	return __arm_ioremap(phys_addr, size, mtype);
+}
+
 void __iounmap(volatile void __iomem *addr)
 {
 }

arch/arm/plat-iop/io.c

@@ -34,7 +34,8 @@ void * __iomem __iop3xx_ioremap(unsigned long cookie, size_t size,
 		retval = (void *) IOP3XX_PMMR_PHYS_TO_VIRT(cookie);
 		break;
 	default:
-		retval = __arm_ioremap(cookie, size, mtype);
+		retval = __arm_ioremap_caller(cookie, size, mtype,
+				__builtin_return_address(0));
 	}
 
 	return retval;

arch/arm/plat-mxc/include/mach/vmalloc.h

@@ -21,6 +21,6 @@
 #define __ASM_ARCH_MXC_VMALLOC_H__
 
 /* vmalloc ending address */
-#define VMALLOC_END       0xF4000000
+#define VMALLOC_END       0xf4000000UL
 
 #endif /* __ASM_ARCH_MXC_VMALLOC_H__ */

arch/arm/plat-omap/Kconfig

@@ -22,6 +22,7 @@ config ARCH_OMAP3
 	bool "TI OMAP3"
 	select CPU_V7
 	select COMMON_CLKDEV
+	select ARM_L1_CACHE_SHIFT_6
 
 config ARCH_OMAP4
 	bool "TI OMAP4"

arch/arm/plat-omap/include/plat/omap44xx.h

@@ -40,6 +40,7 @@
 #define OMAP44XX_GIC_CPU_BASE		0x48240100
 #define OMAP44XX_SCU_BASE		0x48240000
 #define OMAP44XX_LOCAL_TWD_BASE		0x48240600
+#define OMAP44XX_L2CACHE_BASE		0x48242000
 #define OMAP44XX_WKUPGEN_BASE		0x48281000
 
 #define OMAP44XX_MAILBOX_BASE		(L4_44XX_BASE + 0xF4000)

arch/arm/plat-omap/io.c

@@ -128,7 +128,7 @@ void __iomem *omap_ioremap(unsigned long p, size_t size, unsigned int type)
 			return XLATE(p, L4_EMU_44XX_PHYS, L4_EMU_44XX_VIRT);
 	}
 #endif
-	return __arm_ioremap(p, size, type);
+	return __arm_ioremap_caller(p, size, type, __builtin_return_address(0));
 }
 EXPORT_SYMBOL(omap_ioremap);
 

arch/arm/plat-s3c/include/mach/vmalloc.h

@@ -15,6 +15,6 @@
 #ifndef __ASM_ARCH_VMALLOC_H
 #define __ASM_ARCH_VMALLOC_H
 
-#define VMALLOC_END	  (0xE0000000)
+#define VMALLOC_END	  (0xe0000000UL)
 
 #endif /* __ASM_ARCH_VMALLOC_H */

arch/arm/plat-stmp3xxx/include/mach/vmalloc.h

@@ -9,4 +9,4 @@
  * http://www.opensource.org/licenses/gpl-license.html
  * http://www.gnu.org/copyleft/gpl.html
  */
-#define VMALLOC_END       (0xF0000000)
+#define VMALLOC_END       0xf0000000UL

arch/arm/vfp/vfpmodule.c

@@ -430,7 +430,11 @@ static inline void vfp_pm_init(void) { }
  * saved one. This function is used by the ptrace mechanism.
  */
 #ifdef CONFIG_SMP
-void vfp_sync_state(struct thread_info *thread)
+void vfp_sync_hwstate(struct thread_info *thread)
+{
+}
+
+void vfp_flush_hwstate(struct thread_info *thread)
 {
 	/*
 	 * On SMP systems, the VFP state is automatically saved at every
@@ -441,35 +445,48 @@ void vfp_sync_state(struct thread_info *thread)
 	thread->vfpstate.hard.cpu = NR_CPUS;
 }
 #else
-void vfp_sync_state(struct thread_info *thread)
+void vfp_sync_hwstate(struct thread_info *thread)
 {
 	unsigned int cpu = get_cpu();
-	u32 fpexc = fmrx(FPEXC);
 
 	/*
-	 * If VFP is enabled, the previous state was already saved and
-	 * last_VFP_context updated.
+	 * If the thread we're interested in is the current owner of the
+	 * hardware VFP state, then we need to save its state.
 	 */
-	if (fpexc & FPEXC_EN)
-		goto out;
+	if (last_VFP_context[cpu] == &thread->vfpstate) {
+		u32 fpexc = fmrx(FPEXC);
 
-	if (!last_VFP_context[cpu])
-		goto out;
+		/*
+		 * Save the last VFP state on this CPU.
+		 */
+		fmxr(FPEXC, fpexc | FPEXC_EN);
+		vfp_save_state(&thread->vfpstate, fpexc | FPEXC_EN);
+		fmxr(FPEXC, fpexc);
+	}
 
-	/*
-	 * Save the last VFP state on this CPU.
-	 */
-	fmxr(FPEXC, fpexc | FPEXC_EN);
-	vfp_save_state(last_VFP_context[cpu], fpexc);
-	fmxr(FPEXC, fpexc);
+	put_cpu();
+}
+
+void vfp_flush_hwstate(struct thread_info *thread)
+{
+	unsigned int cpu = get_cpu();
 
 	/*
-	 * Set the context to NULL to force a reload the next time the thread
-	 * uses the VFP.
+	 * If the thread we're interested in is the current owner of the
+	 * hardware VFP state, then we need to save its state.
 	 */
-	last_VFP_context[cpu] = NULL;
+	if (last_VFP_context[cpu] == &thread->vfpstate) {
+		u32 fpexc = fmrx(FPEXC);
+
+		fmxr(FPEXC, fpexc & ~FPEXC_EN);
+
+		/*
+		 * Set the context to NULL to force a reload the next time
+		 * the thread uses the VFP.
+		 */
+		last_VFP_context[cpu] = NULL;
+	}
 
-out:
 	put_cpu();
 }
 #endif

drivers/serial/amba-pl011.c

@@ -71,6 +71,7 @@ struct uart_amba_port {
 	unsigned int		im;	/* interrupt mask */
 	unsigned int		old_status;
 	unsigned int		ifls;	/* vendor-specific */
+	bool			autorts;
 };
 
 /* There is by now at least one vendor with differing details, so handle it */
@@ -308,6 +309,11 @@ static void pl011_set_mctrl(struct uart_port *port, unsigned int mctrl)
 	TIOCMBIT(TIOCM_OUT1, UART011_CR_OUT1);
 	TIOCMBIT(TIOCM_OUT2, UART011_CR_OUT2);
 	TIOCMBIT(TIOCM_LOOP, UART011_CR_LBE);
+
+	if (uap->autorts) {
+		/* We need to disable auto-RTS if we want to turn RTS off */
+		TIOCMBIT(TIOCM_RTS, UART011_CR_RTSEN);
+	}
 #undef TIOCMBIT
 
 	writew(cr, uap->port.membase + UART011_CR);
@@ -437,6 +443,7 @@ static void pl011_shutdown(struct uart_port *port)
 	/*
 	 * disable the port
 	 */
+	uap->autorts = false;
 	writew(UART01x_CR_UARTEN | UART011_CR_TXE, uap->port.membase + UART011_CR);
 
 	/*
@@ -456,6 +463,7 @@ static void
 pl011_set_termios(struct uart_port *port, struct ktermios *termios,
 		     struct ktermios *old)
 {
+	struct uart_amba_port *uap = (struct uart_amba_port *)port;
 	unsigned int lcr_h, old_cr;
 	unsigned long flags;
 	unsigned int baud, quot;
@@ -532,6 +540,17 @@ pl011_set_termios(struct uart_port *port, struct ktermios *termios,
 	old_cr = readw(port->membase + UART011_CR);
 	writew(0, port->membase + UART011_CR);
 
+	if (termios->c_cflag & CRTSCTS) {
+		if (old_cr & UART011_CR_RTS)
+			old_cr |= UART011_CR_RTSEN;
+
+		old_cr |= UART011_CR_CTSEN;
+		uap->autorts = true;
+	} else {
+		old_cr &= ~(UART011_CR_CTSEN | UART011_CR_RTSEN);
+		uap->autorts = false;
+	}
+
 	/* Set baud rate */
 	writew(quot & 0x3f, port->membase + UART011_FBRD);
 	writew(quot >> 6, port->membase + UART011_IBRD);