x86: introduce max_pfn_mapped

64bit uses end_pfn_map and 32bit uses max_low_pfn. There are several
files which have #ifdef'ed defines which map either to end_pfn_map or
max_low_pfn. Replace this by a universal define and clean up all the
other instances.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/kernel/efi.c

@@ -396,7 +396,7 @@ static void __init runtime_code_page_mkexec(void)
 		md = p;
 		end = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT);
 		if (md->type == EFI_RUNTIME_SERVICES_CODE &&
-		    (end >> PAGE_SHIFT) <= end_pfn_map)
+		    (end >> PAGE_SHIFT) <= max_pfn_mapped)
 			change_page_attr_addr(md->virt_addr,
 					      md->num_pages,
 					      PAGE_KERNEL_EXEC_NOCACHE);
@@ -429,7 +429,7 @@ void __init efi_enter_virtual_mode(void)
 			continue;
 		end = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT);
 		if ((md->attribute & EFI_MEMORY_WB) &&
-		    ((end >> PAGE_SHIFT) <= end_pfn_map))
+		    ((end >> PAGE_SHIFT) <= max_pfn_mapped))
 			md->virt_addr = (unsigned long)__va(md->phys_addr);
 		else
 			md->virt_addr = (unsigned long)

arch/x86/mm/pageattr-test.c

@@ -27,13 +27,6 @@ enum {
 	GPS			= (1<<30)
 };
 
-#ifdef CONFIG_X86_64
-# include <asm/proto.h>
-# define max_mapped		end_pfn_map
-#else
-# define max_mapped		max_low_pfn
-#endif
-
 struct split_state {
 	long lpg, gpg, spg, exec;
 	long min_exec, max_exec;
@@ -48,7 +41,7 @@ static __init int print_split(struct split_state *s)
 	s->lpg = s->gpg = s->spg = s->exec = 0;
 	s->min_exec = ~0UL;
 	s->max_exec = 0;
-	for (i = 0; i < max_mapped; ) {
+	for (i = 0; i < max_pfn_mapped; ) {
 		unsigned long addr = (unsigned long)__va(i << PAGE_SHIFT);
 		int level;
 		pte_t *pte;
@@ -97,8 +90,8 @@ static __init int print_split(struct split_state *s)
 
 	expected = (s->gpg*GPS + s->lpg*LPS)/PAGE_SIZE + s->spg + missed;
 	if (expected != i) {
-		printk(KERN_ERR "CPA max_mapped %lu but expected %lu\n",
-			max_mapped, expected);
+		printk(KERN_ERR "CPA max_pfn_mapped %lu but expected %lu\n",
+			max_pfn_mapped, expected);
 		return 1;
 	}
 	return err;
@@ -120,22 +113,22 @@ static __init int exercise_pageattr(void)
 
 	printk(KERN_INFO "CPA exercising pageattr\n");
 
-	bm = vmalloc((max_mapped + 7) / 8);
+	bm = vmalloc((max_pfn_mapped + 7) / 8);
 	if (!bm) {
 		printk(KERN_ERR "CPA Cannot vmalloc bitmap\n");
 		return -ENOMEM;
 	}
-	memset(bm, 0, (max_mapped + 7) / 8);
+	memset(bm, 0, (max_pfn_mapped + 7) / 8);
 
 	failed += print_split(&sa);
 	srandom32(100);
 
 	for (i = 0; i < NTEST; i++) {
-		unsigned long pfn = random32() % max_mapped;
+		unsigned long pfn = random32() % max_pfn_mapped;
 
 		addr[i] = (unsigned long)__va(pfn << PAGE_SHIFT);
 		len[i] = random32() % 100;
-		len[i] = min_t(unsigned long, len[i], max_mapped - pfn - 1);
+		len[i] = min_t(unsigned long, len[i], max_pfn_mapped - pfn - 1);
 
 		if (len[i] == 0)
 			len[i] = 1;

include/asm-x86/efi.h

@@ -35,8 +35,6 @@ extern unsigned long asmlinkage efi_call_phys(void *, ...);
 
 #define efi_ioremap(addr, size)			ioremap(addr, size)
 
-#define end_pfn_map				max_low_pfn
-
 #else /* !CONFIG_X86_32 */
 
 #define MAX_EFI_IO_PAGES	100

include/asm-x86/page.h

@@ -33,8 +33,10 @@
 
 #ifdef CONFIG_X86_64
 #include <asm/page_64.h>
+#define max_pfn_mapped		end_pfn_map
 #else
 #include <asm/page_32.h>
+#define max_pfn_mapped		max_low_pfn
 #endif	/* CONFIG_X86_64 */
 
 #define PAGE_OFFSET		((unsigned long)__PAGE_OFFSET)