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@@ -1,5 +1,241 @@
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-#ifdef CONFIG_X86_32
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-# include "local_32.h"
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-#else
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-# include "local_64.h"
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+#ifndef _ARCH_LOCAL_H
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+#define _ARCH_LOCAL_H
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+
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+#include <linux/percpu.h>
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+
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+#include <asm/system.h>
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+#include <asm/atomic.h>
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+#include <asm/asm.h>
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+
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+typedef struct
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+{
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+ atomic_long_t a;
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+} local_t;
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+
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+#define LOCAL_INIT(i) { ATOMIC_LONG_INIT(i) }
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+
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+#define local_read(l) atomic_long_read(&(l)->a)
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+#define local_set(l,i) atomic_long_set(&(l)->a, (i))
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+
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+static inline void local_inc(local_t *l)
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+{
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+ __asm__ __volatile__(
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+ _ASM_INC "%0"
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+ :"+m" (l->a.counter));
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+}
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+
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+static inline void local_dec(local_t *l)
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+{
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+ __asm__ __volatile__(
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+ _ASM_DEC "%0"
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+ :"+m" (l->a.counter));
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+}
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+
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+static inline void local_add(long i, local_t *l)
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+{
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+ __asm__ __volatile__(
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+ _ASM_ADD "%1,%0"
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+ :"+m" (l->a.counter)
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+ :"ir" (i));
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+}
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+
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+static inline void local_sub(long i, local_t *l)
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+{
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+ __asm__ __volatile__(
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+ _ASM_SUB "%1,%0"
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+ :"+m" (l->a.counter)
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+ :"ir" (i));
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+}
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+
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+/**
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+ * local_sub_and_test - subtract value from variable and test result
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+ * @i: integer value to subtract
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+ * @l: pointer to type local_t
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+ *
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+ * Atomically subtracts @i from @l and returns
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+ * true if the result is zero, or false for all
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+ * other cases.
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+ */
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+static inline int local_sub_and_test(long i, local_t *l)
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+{
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+ unsigned char c;
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+
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+ __asm__ __volatile__(
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+ _ASM_SUB "%2,%0; sete %1"
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+ :"+m" (l->a.counter), "=qm" (c)
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+ :"ir" (i) : "memory");
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+ return c;
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+}
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+
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+/**
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+ * local_dec_and_test - decrement and test
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+ * @l: pointer to type local_t
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+ *
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+ * Atomically decrements @l by 1 and
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+ * returns true if the result is 0, or false for all other
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+ * cases.
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+ */
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+static inline int local_dec_and_test(local_t *l)
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+{
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+ unsigned char c;
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+
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+ __asm__ __volatile__(
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+ _ASM_DEC "%0; sete %1"
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+ :"+m" (l->a.counter), "=qm" (c)
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+ : : "memory");
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+ return c != 0;
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+}
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+
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+/**
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+ * local_inc_and_test - increment and test
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+ * @l: pointer to type local_t
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+ *
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+ * Atomically increments @l by 1
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+ * and returns true if the result is zero, or false for all
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+ * other cases.
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+ */
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+static inline int local_inc_and_test(local_t *l)
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+{
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+ unsigned char c;
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+
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+ __asm__ __volatile__(
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+ _ASM_INC "%0; sete %1"
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+ :"+m" (l->a.counter), "=qm" (c)
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+ : : "memory");
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+ return c != 0;
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+}
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+
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+/**
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+ * local_add_negative - add and test if negative
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+ * @i: integer value to add
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+ * @l: pointer to type local_t
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+ *
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+ * Atomically adds @i to @l and returns true
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+ * if the result is negative, or false when
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+ * result is greater than or equal to zero.
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+ */
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+static inline int local_add_negative(long i, local_t *l)
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+{
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+ unsigned char c;
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+
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+ __asm__ __volatile__(
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+ _ASM_ADD "%2,%0; sets %1"
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+ :"+m" (l->a.counter), "=qm" (c)
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+ :"ir" (i) : "memory");
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+ return c;
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+}
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+
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+/**
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+ * local_add_return - add and return
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+ * @i: integer value to add
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+ * @l: pointer to type local_t
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+ *
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+ * Atomically adds @i to @l and returns @i + @l
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+ */
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+static inline long local_add_return(long i, local_t *l)
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+{
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+ long __i;
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+#ifdef CONFIG_M386
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+ unsigned long flags;
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+ if(unlikely(boot_cpu_data.x86 <= 3))
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+ goto no_xadd;
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#endif
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+ /* Modern 486+ processor */
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+ __i = i;
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+ __asm__ __volatile__(
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+ _ASM_XADD "%0, %1;"
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+ :"+r" (i), "+m" (l->a.counter)
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+ : : "memory");
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+ return i + __i;
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+
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+#ifdef CONFIG_M386
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+no_xadd: /* Legacy 386 processor */
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+ local_irq_save(flags);
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+ __i = local_read(l);
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+ local_set(l, i + __i);
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+ local_irq_restore(flags);
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+ return i + __i;
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+#endif
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+}
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+
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+static inline long local_sub_return(long i, local_t *l)
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+{
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+ return local_add_return(-i,l);
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+}
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+
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+#define local_inc_return(l) (local_add_return(1,l))
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+#define local_dec_return(l) (local_sub_return(1,l))
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+
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+#define local_cmpxchg(l, o, n) \
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+ (cmpxchg_local(&((l)->a.counter), (o), (n)))
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+/* Always has a lock prefix */
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+#define local_xchg(l, n) (xchg(&((l)->a.counter), (n)))
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+
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+/**
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+ * local_add_unless - add unless the number is a given value
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+ * @l: pointer of type local_t
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+ * @a: the amount to add to l...
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+ * @u: ...unless l is equal to u.
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+ *
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+ * Atomically adds @a to @l, so long as it was not @u.
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+ * Returns non-zero if @l was not @u, and zero otherwise.
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+ */
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+#define local_add_unless(l, a, u) \
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+({ \
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+ long c, old; \
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+ c = local_read(l); \
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+ for (;;) { \
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+ if (unlikely(c == (u))) \
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+ break; \
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+ old = local_cmpxchg((l), c, c + (a)); \
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+ if (likely(old == c)) \
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+ break; \
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+ c = old; \
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+ } \
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+ c != (u); \
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+})
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+#define local_inc_not_zero(l) local_add_unless((l), 1, 0)
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+
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+/* On x86_32, these are no better than the atomic variants.
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+ * On x86-64 these are better than the atomic variants on SMP kernels
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+ * because they dont use a lock prefix.
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+ */
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+#define __local_inc(l) local_inc(l)
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+#define __local_dec(l) local_dec(l)
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+#define __local_add(i,l) local_add((i),(l))
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+#define __local_sub(i,l) local_sub((i),(l))
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+
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+/* Use these for per-cpu local_t variables: on some archs they are
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+ * much more efficient than these naive implementations. Note they take
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+ * a variable, not an address.
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+ *
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+ * X86_64: This could be done better if we moved the per cpu data directly
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+ * after GS.
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+ */
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+
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+/* Need to disable preemption for the cpu local counters otherwise we could
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+ still access a variable of a previous CPU in a non atomic way. */
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+#define cpu_local_wrap_v(l) \
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+ ({ local_t res__; \
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+ preempt_disable(); \
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+ res__ = (l); \
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+ preempt_enable(); \
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+ res__; })
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+#define cpu_local_wrap(l) \
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+ ({ preempt_disable(); \
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+ l; \
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+ preempt_enable(); }) \
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+
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+#define cpu_local_read(l) cpu_local_wrap_v(local_read(&__get_cpu_var(l)))
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+#define cpu_local_set(l, i) cpu_local_wrap(local_set(&__get_cpu_var(l), (i)))
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+#define cpu_local_inc(l) cpu_local_wrap(local_inc(&__get_cpu_var(l)))
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+#define cpu_local_dec(l) cpu_local_wrap(local_dec(&__get_cpu_var(l)))
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+#define cpu_local_add(i, l) cpu_local_wrap(local_add((i), &__get_cpu_var(l)))
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+#define cpu_local_sub(i, l) cpu_local_wrap(local_sub((i), &__get_cpu_var(l)))
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+
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+#define __cpu_local_inc(l) cpu_local_inc(l)
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+#define __cpu_local_dec(l) cpu_local_dec(l)
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+#define __cpu_local_add(i, l) cpu_local_add((i), (l))
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+#define __cpu_local_sub(i, l) cpu_local_sub((i), (l))
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+
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+#endif /* _ARCH_LOCAL_H */
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Harvey Harrison