generic PAGE_SIZE infrastructure (v4)

diff -puN include/linux/kernel.h~align-h include/linux/kernel.h
@@ -13,6 +13,7 @@
 #include <linux/types.h>
 #include <linux/compiler.h>
 #include <linux/bitops.h>
+#include <linux/align.h>
 #include <asm/byteorder.h>
 #include <asm/bug.h>
 

@@ -31,7 +32,6 @@ extern const char linux_banner[];
 #define STACK_MAGIC	0xdeadbeef
 
 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
-#define ALIGN(x,a) (((x)+(a)-1)&~((a)-1))
 #define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f))
 #define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y))
 

diff -puN /dev/null include/linux/align.h
@@ -0,0 +1,20 @@
+#ifndef _LINUX_ALIGN_H
+#define _LINUX_ALIGN_H
+
+/*
+ * This file should only contain macros which have no outside
+ * dependencies, and can be used safely from any other header.
+ */
+
+#define _ALIGN_UP(x,a) ({ typeof(a) __a = (a); (((x) + __a - 1) & ~(__a - 1)); })
+#define _ALIGN_DOWN(x,a)  ((x)&(~((a)-1)))
+
+/*
+ * ALIGN is special.  There's a linkage.h as well that
+ * has a quite different meaning.
+ */
+#ifndef __ASSEMBLY__
+#define ALIGN(addr,size) _ALIGN_UP(addr,size)
+#endif
+
+#endif /* _LINUX_ALIGN_H */

diff -puN include/asm-ppc/page.h~align-h include/asm-ppc/page.h
@@ -1,6 +1,7 @@
 #ifndef _PPC_PAGE_H
 #define _PPC_PAGE_H
 
+#include <linux/align.h>
 #include <asm/asm-compat.h>
 
 /* PAGE_SHIFT determines the page size */

@@ -36,15 +37,8 @@ typedef unsigned long pte_basic_t;
 #define PTE_FMT		"%.8lx"
 #endif
 
-/* align addr on a size boundary - adjust address up/down if needed */
-#define _ALIGN_UP(addr,size)	(((addr)+((size)-1))&(~((size)-1)))
-#define _ALIGN_DOWN(addr,size)	((addr)&(~((size)-1)))
-
-/* align addr on a size boundary - adjust address up if needed */
-#define _ALIGN(addr,size)     _ALIGN_UP(addr,size)
-
 /* to align the pointer to the (next) page boundary */
-#define PAGE_ALIGN(addr)	_ALIGN(addr, PAGE_SIZE)
+#define PAGE_ALIGN(addr)	ALIGN(addr, PAGE_SIZE)
 
 
 #undef STRICT_MM_TYPECHECKS

diff -puN include/asm-ppc/bootinfo.h~align-h include/asm-ppc/bootinfo.h
@@ -41,7 +41,7 @@ static inline struct bi_record *
 bootinfo_addr(unsigned long offset)
 {
 
-	return (struct bi_record *)_ALIGN((offset) + (1 << 20) - 1,
+	return (struct bi_record *)ALIGN((offset) + (1 << 20) - 1,
 					  (1 << 20));
 }
 #endif /* CONFIG_APUS */

diff -puN include/asm-powerpc/page.h~align-h include/asm-powerpc/page.h
@@ -11,6 +11,7 @@
  */
 
 #ifdef __KERNEL__
+#include <linux/align.h>
 #include <asm/asm-compat.h>
 #include <asm/kdump.h>
 

@@ -89,15 +90,8 @@
 #include <asm/page_32.h>
 #endif
 
-/* align addr on a size boundary - adjust address up/down if needed */
-#define _ALIGN_UP(addr,size)	(((addr)+((size)-1))&(~((size)-1)))
-#define _ALIGN_DOWN(addr,size)	((addr)&(~((size)-1)))
-
-/* align addr on a size boundary - adjust address up if needed */
-#define _ALIGN(addr,size)     _ALIGN_UP(addr,size)
-
 /* to align the pointer to the (next) page boundary */
-#define PAGE_ALIGN(addr)	_ALIGN(addr, PAGE_SIZE)
+#define PAGE_ALIGN(addr)	ALIGN(addr, PAGE_SIZE)
 
 /*
  * Don't compare things with KERNELBASE or PAGE_OFFSET to test for

diff -puN arch/powerpc/kernel/prom.c~align-h arch/powerpc/kernel/prom.c
@@ -125,9 +125,9 @@ int __init of_scan_flat_dt(int (*it)(uns
 			u32 sz = *((u32 *)p);
 			p += 8;
 			if (initial_boot_params->version < 0x10)
-				p = _ALIGN(p, sz >= 8 ? 8 : 4);
+				p = ALIGN(p, sz >= 8 ? 8 : 4);
 			p += sz;
-			p = _ALIGN(p, 4);
+			p = ALIGN(p, 4);
 			continue;
 		}
 		if (tag != OF_DT_BEGIN_NODE) {

@@ -137,7 +137,7 @@ int __init of_scan_flat_dt(int (*it)(uns
 		}
 		depth++;
 		pathp = (char *)p;
-		p = _ALIGN(p + strlen(pathp) + 1, 4);
+		p = ALIGN(p + strlen(pathp) + 1, 4);
 		if ((*pathp) = '/') {
 			char *lp, *np;
 			for (lp = NULL, np = pathp; *np; np++)

@@ -163,7 +163,7 @@ unsigned long __init of_get_flat_dt_root
 		p += 4;
 	BUG_ON (*((u32 *)p) != OF_DT_BEGIN_NODE);
 	p += 4;
-	return _ALIGN(p + strlen((char *)p) + 1, 4);
+	return ALIGN(p + strlen((char *)p) + 1, 4);
 }
 
 /**

@@ -190,7 +190,7 @@ void* __init of_get_flat_dt_prop(unsigne
 		noff = *((u32 *)(p + 4));
 		p += 8;
 		if (initial_boot_params->version < 0x10)
-			p = _ALIGN(p, sz >= 8 ? 8 : 4);
+			p = ALIGN(p, sz >= 8 ? 8 : 4);
 
 		nstr = find_flat_dt_string(noff);
 		if (nstr = NULL) {

@@ -204,7 +204,7 @@ void* __init of_get_flat_dt_prop(unsigne
 			return (void *)p;
 		}
 		p += sz;
-		p = _ALIGN(p, 4);
+		p = ALIGN(p, 4);
 	} while(1);
 }
 

@@ -232,7 +232,7 @@ static void *__init unflatten_dt_alloc(u
 {
 	void *res;
 
-	*mem = _ALIGN(*mem, align);
+	*mem = ALIGN(*mem, align);
 	res = (void *)*mem;
 	*mem += size;
 

@@ -261,7 +261,7 @@ static unsigned long __init unflatten_dt
 	*p += 4;
 	pathp = (char *)*p;
 	l = allocl = strlen(pathp) + 1;
-	*p = _ALIGN(*p + l, 4);
+	*p = ALIGN(*p + l, 4);
 
 	/* version 0x10 has a more compact unit name here instead of the full
 	 * path. we accumulate the full path size using "fpsize", we'll rebuild

@@ -340,7 +340,7 @@ static unsigned long __init unflatten_dt
 		noff = *((u32 *)((*p) + 4));
 		*p += 8;
 		if (initial_boot_params->version < 0x10)
-			*p = _ALIGN(*p, sz >= 8 ? 8 : 4);
+			*p = ALIGN(*p, sz >= 8 ? 8 : 4);
 
 		pname = find_flat_dt_string(noff);
 		if (pname = NULL) {

@@ -366,7 +366,7 @@ static unsigned long __init unflatten_dt
 			*prev_pp = pp;
 			prev_pp = &pp->next;
 		}
-		*p = _ALIGN((*p) + sz, 4);
+		*p = ALIGN((*p) + sz, 4);
 	}
 	/* with version 0x10 we may not have the name property, recreate
 	 * it here from the unit name if absent

diff -puN arch/powerpc/kernel/prom_init.c~align-h arch/powerpc/kernel/prom_init.c
@@ -16,6 +16,7 @@
 #undef DEBUG_PROM
 
 #include <stdarg.h>
+#include <linux/align.h>
 #include <linux/kernel.h>
 #include <linux/string.h>
 #include <linux/init.h>

@@ -1679,7 +1680,7 @@ static void __init *make_room(unsigned l
 {
 	void *ret;
 
-	*mem_start = _ALIGN(*mem_start, align);
+	*mem_start = ALIGN(*mem_start, align);
 	while ((*mem_start + needed) > *mem_end) {
 		unsigned long room, chunk;
 

@@ -1811,7 +1812,7 @@ static void __init scan_dt_build_struct(
 				*lp++ = *p;
 		}
 		*lp = 0;
-		*mem_start = _ALIGN((unsigned long)lp + 1, 4);
+		*mem_start = ALIGN((unsigned long)lp + 1, 4);
 	}
 
 	/* get it again for debugging */

@@ -1864,7 +1865,7 @@ static void __init scan_dt_build_struct(
 		/* push property content */
 		valp = make_room(mem_start, mem_end, l, 4);
 		call_prom("getprop", 4, 1, node, RELOC(pname), valp, l);
-		*mem_start = _ALIGN(*mem_start, 4);
+		*mem_start = ALIGN(*mem_start, 4);
 	}
 
 	/* Add a "linux,phandle" property. */

@@ -1920,7 +1921,7 @@ static void __init flatten_device_tree(v
 		prom_panic ("couldn't get device tree root\n");
 
 	/* Build header and make room for mem rsv map */ 
-	mem_start = _ALIGN(mem_start, 4);
+	mem_start = ALIGN(mem_start, 4);
 	hdr = make_room(&mem_start, &mem_end,
 			sizeof(struct boot_param_header), 4);
 	RELOC(dt_header_start) = (unsigned long)hdr;

diff -puN arch/powerpc/mm/44x_mmu.c~align-h arch/powerpc/mm/44x_mmu.c
@@ -103,7 +103,7 @@ unsigned long __init mmu_mapin_ram(void)
 
 	/* Determine number of entries necessary to cover lowmem */
 	pinned_tlbs = (unsigned int)
-		(_ALIGN(total_lowmem, PPC44x_PIN_SIZE) >> PPC44x_PIN_SHIFT);
+		(ALIGN(total_lowmem, PPC44x_PIN_SIZE) >> PPC44x_PIN_SHIFT);
 
 	/* Write upper watermark to save location */
 	tlb_44x_hwater = PPC44x_LOW_SLOT - pinned_tlbs;

diff -puN arch/powerpc/platforms/iseries/setup.c~align-h arch/powerpc/platforms/iseries/setup.c
@@ -354,7 +354,7 @@ EXPORT_SYMBOL(mschunks_map);
 
 void mschunks_alloc(unsigned long num_chunks)
 {
-	klimit = _ALIGN(klimit, sizeof(u32));
+	klimit = ALIGN(klimit, sizeof(u32));
 	mschunks_map.mapping = (u32 *)klimit;
 	klimit += num_chunks * sizeof(u32);
 	mschunks_map.num_chunks = num_chunks;

diff -puN arch/powerpc/platforms/powermac/bootx_init.c~align-h arch/powerpc/platforms/powermac/bootx_init.c
@@ -389,7 +389,7 @@ static unsigned long __init bootx_flatte
 	hdr->dt_strings_size = bootx_dt_strend - bootx_dt_strbase;
 
 	/* Build structure */
-	mem_end = _ALIGN(mem_end, 16);
+	mem_end = ALIGN(mem_end, 16);
 	DBG("Building device tree structure at: %x\n", mem_end);
 	hdr->off_dt_struct = mem_end - mem_start;
 	bootx_scan_dt_build_struct(base, 4, &mem_end);

@@ -407,7 +407,7 @@ static unsigned long __init bootx_flatte
 	 * also bump mem_reserve_cnt to cause further reservations to
 	 * fail since it's too late.
 	 */
-	mem_end = _ALIGN(mem_end, PAGE_SIZE);
+	mem_end = ALIGN(mem_end, PAGE_SIZE);
 	DBG("End of boot params: %x\n", mem_end);
 	rsvmap[0] = mem_start;
 	rsvmap[1] = mem_end;

diff -puN arch/ppc/kernel/setup.c~align-h arch/ppc/kernel/setup.c
@@ -341,14 +341,14 @@ struct bi_record *find_bootinfo(void)
 {
 	struct bi_record *rec;
 
-	rec = (struct bi_record *)_ALIGN((ulong)__bss_start+(1<<20)-1,(1<<20));
+	rec = (struct bi_record *)ALIGN((ulong)__bss_start+(1<<20)-1,(1<<20));
 	if ( rec->tag != BI_FIRST ) {
 		/*
 		 * This 0x10000 offset is a terrible hack but it will go away when
 		 * we have the bootloader handle all the relocation and
 		 * prom calls -- Cort
 		 */
-		rec = (struct bi_record *)_ALIGN((ulong)__bss_start+0x10000+(1<<20)-1,(1<<20));
+		rec = (struct bi_record *)ALIGN((ulong)__bss_start+0x10000+(1<<20)-1,(1<<20));
 		if ( rec->tag != BI_FIRST )
 			return NULL;
 	}

diff -puN arch/ppc/mm/44x_mmu.c~align-h arch/ppc/mm/44x_mmu.c
@@ -103,7 +103,7 @@ unsigned long __init mmu_mapin_ram(void)
 
 	/* Determine number of entries necessary to cover lowmem */
 	pinned_tlbs = (unsigned int)
-		(_ALIGN(total_lowmem, PPC_PIN_SIZE) >> PPC44x_PIN_SHIFT);
+		(ALIGN(total_lowmem, PPC_PIN_SIZE) >> PPC44x_PIN_SHIFT);
 
 	/* Write upper watermark to save location */
 	tlb_44x_hwater = PPC44x_LOW_SLOT - pinned_tlbs;

diff -puN include/asm-generic/page.h~generic-get_order include/asm-generic/page.h
@@ -6,6 +6,7 @@
 
 #include <linux/compiler.h>
 
+#ifndef CONFIG_ARCH_HAVE_GET_ORDER
 /* Pure 2^n version of get_order */
 static __inline__ __attribute_const__ int get_order(unsigned long size)
 {

@@ -20,7 +21,8 @@ static __inline__ __attribute_const__ in
 	return order;
 }
 
-#endif	/* __ASSEMBLY__ */
+#endif	/* CONFIG_ARCH_HAVE_GET_ORDER */
+#endif /*  __ASSEMBLY__ */
 #endif	/* __KERNEL__ */
 
 #endif	/* _ASM_GENERIC_PAGE_H */

diff -puN include/asm-generic/page.h~generic-PAGE_SIZE-infrastructure include/asm-generic/page.h
@@ -1,11 +1,36 @@
 #ifndef _ASM_GENERIC_PAGE_H
 #define _ASM_GENERIC_PAGE_H
 
+#include <linux/compiler.h>
+#include <linux/align.h>
+
 #ifdef __KERNEL__
-#ifndef __ASSEMBLY__
 
-#include <linux/compiler.h>
+#ifdef __ASSEMBLY__
+#define ASM_CONST(x) x
+#else
+#define __ASM_CONST(x) x##UL
+#define ASM_CONST(x) __ASM_CONST(x)
+#endif
+
+#ifdef CONFIG_ARCH_GENERIC_PAGE_SIZE
+
+#define PAGE_SHIFT      CONFIG_PAGE_SHIFT
+#define PAGE_SIZE       (ASM_CONST(1) << PAGE_SHIFT)
+
+/*
+ * Subtle: (1 << PAGE_SHIFT) is an int, not an unsigned long. So if we
+ * assign PAGE_MASK to a larger type it gets extended the way we want
+ * (i.e. with 1s in the high bits)
+ */
+#define PAGE_MASK      (~((1 << PAGE_SHIFT) - 1))
 
+/* to align the pointer to the (next) page boundary */
+#define PAGE_ALIGN(addr)        ALIGN(addr, PAGE_SIZE)
+
+#endif /* CONFIG_ARCH_GENERIC_PAGE_SIZE */
+
+#ifndef __ASSEMBLY__
 #ifndef CONFIG_ARCH_HAVE_GET_ORDER
 /* Pure 2^n version of get_order */
 static __inline__ __attribute_const__ int get_order(unsigned long size)

@@ -22,7 +47,7 @@ static __inline__ __attribute_const__ in
 }
 
 #endif	/* CONFIG_ARCH_HAVE_GET_ORDER */
-#endif /*  __ASSEMBLY__ */
+#endif  /* __ASSEMBLY__ */
 #endif	/* __KERNEL__ */
 
 #endif	/* _ASM_GENERIC_PAGE_H */

diff -puN include/asm-generic/page.h~generic-PAGE_SIZE-infrastructure include/asm-generic/page.h
@@ -1,11 +1,36 @@
 #ifndef _ASM_GENERIC_PAGE_H
 #define _ASM_GENERIC_PAGE_H
 
+#include <linux/compiler.h>
+#include <linux/align.h>
+
 #ifdef __KERNEL__
-#ifndef __ASSEMBLY__
 
-#include <linux/compiler.h>
+#ifdef __ASSEMBLY__
+#define ASM_CONST(x) x
+#else
+#define __ASM_CONST(x) x##UL
+#define ASM_CONST(x) __ASM_CONST(x)
+#endif
+
+#ifdef CONFIG_ARCH_GENERIC_PAGE_SIZE
+
+#define PAGE_SHIFT      CONFIG_PAGE_SHIFT
+#define PAGE_SIZE       (ASM_CONST(1) << PAGE_SHIFT)
+
+/*
+ * Subtle: (1 << PAGE_SHIFT) is an int, not an unsigned long. So if we
+ * assign PAGE_MASK to a larger type it gets extended the way we want
+ * (i.e. with 1s in the high bits)
+ */
+#define PAGE_MASK      (~((1 << PAGE_SHIFT) - 1))
 
+/* to align the pointer to the (next) page boundary */
+#define PAGE_ALIGN(addr)        ALIGN(addr, PAGE_SIZE)
+
+#endif /* CONFIG_ARCH_GENERIC_PAGE_SIZE */
+
+#ifndef __ASSEMBLY__
 #ifndef CONFIG_ARCH_HAVE_GET_ORDER
 /* Pure 2^n version of get_order */
 static __inline__ __attribute_const__ int get_order(unsigned long size)

diff -puN include/asm-ia64/ptrace.h~ia64 include/asm-ia64/ptrace.h
@@ -64,11 +64,11 @@
  * Base-2 logarithm of number of pages to allocate per task structure
  * (including register backing store and memory stack):
  */
-#if defined(CONFIG_IA64_PAGE_SIZE_4KB)
+#if defined(CONFIG_PAGE_SIZE_4KB)
 # define KERNEL_STACK_SIZE_ORDER		3
-#elif defined(CONFIG_IA64_PAGE_SIZE_8KB)
+#elif defined(CONFIG_PAGE_SIZE_8KB)
 # define KERNEL_STACK_SIZE_ORDER		2
-#elif defined(CONFIG_IA64_PAGE_SIZE_16KB)
+#elif defined(CONFIG_PAGE_SIZE_16KB)
 # define KERNEL_STACK_SIZE_ORDER		1
 #else
 # define KERNEL_STACK_SIZE_ORDER		0

diff -puN include/asm-ia64/page.h~ia64 include/asm-ia64/page.h
@@ -7,7 +7,7 @@
  *	David Mosberger-Tang <[email protected]>
  */
 
-
+#include <asm-generic/page.h>
 #include <asm/intrinsics.h>
 #include <asm/types.h>
 

@@ -24,25 +24,6 @@
 #define RGN_GATE	5	/* Gate page, Kernel text, etc */
 #define RGN_HPAGE	4	/* For Huge TLB pages */
 
-/*
- * PAGE_SHIFT determines the actual kernel page size.
- */
-#if defined(CONFIG_IA64_PAGE_SIZE_4KB)
-# define PAGE_SHIFT	12
-#elif defined(CONFIG_IA64_PAGE_SIZE_8KB)
-# define PAGE_SHIFT	13
-#elif defined(CONFIG_IA64_PAGE_SIZE_16KB)
-# define PAGE_SHIFT	14
-#elif defined(CONFIG_IA64_PAGE_SIZE_64KB)
-# define PAGE_SHIFT	16
-#else
-# error Unsupported page size!
-#endif
-
-#define PAGE_SIZE		(__IA64_UL_CONST(1) << PAGE_SHIFT)
-#define PAGE_MASK		(~(PAGE_SIZE - 1))
-#define PAGE_ALIGN(addr)	(((addr) + PAGE_SIZE - 1) & PAGE_MASK)
-
 #define PERCPU_PAGE_SHIFT	16	/* log2() of max. size of per-CPU area */
 #define PERCPU_PAGE_SIZE	(__IA64_UL_CONST(1) << PERCPU_PAGE_SHIFT)
 

diff -puN include/asm-sparc64/pgtable.h~sparc64 include/asm-sparc64/pgtable.h
@@ -13,6 +13,7 @@
  */
 
 #include <asm-generic/pgtable-nopud.h>
+#include <asm-generic/page.h>
 
 #include <linux/compiler.h>
 #include <asm/types.h>

diff -puN include/asm-sparc64/page.h~sparc64 include/asm-sparc64/page.h
@@ -4,21 +4,7 @@
 #define _SPARC64_PAGE_H
 
 #include <asm/const.h>
-
-#if defined(CONFIG_SPARC64_PAGE_SIZE_8KB)
-#define PAGE_SHIFT   13
-#elif defined(CONFIG_SPARC64_PAGE_SIZE_64KB)
-#define PAGE_SHIFT   16
-#elif defined(CONFIG_SPARC64_PAGE_SIZE_512KB)
-#define PAGE_SHIFT   19
-#elif defined(CONFIG_SPARC64_PAGE_SIZE_4MB)
-#define PAGE_SHIFT   22
-#else
-#error No page size specified in kernel configuration
-#endif
-
-#define PAGE_SIZE    (_AC(1,UL) << PAGE_SHIFT)
-#define PAGE_MASK    (~(PAGE_SIZE-1))
+#include <asm-generic/page.h>
 
 /* Flushing for D-cache alias handling is only needed if
  * the page size is smaller than 16K.

@@ -114,9 +100,6 @@ typedef unsigned long pgprot_t;
 
 #endif /* !(__ASSEMBLY__) */
 
-/* to align the pointer to the (next) page boundary */
-#define PAGE_ALIGN(addr)	(((addr)+PAGE_SIZE-1)&PAGE_MASK)
-
 /* We used to stick this into a hard-coded global register (%g4)
  * but that does not make sense anymore.
  */

diff -puN include/asm-sparc64/mmu.h~sparc64 include/asm-sparc64/mmu.h
@@ -30,13 +30,13 @@
 #define CTX_PGSZ_MASK		((CTX_PGSZ_BITS << CTX_PGSZ0_SHIFT) | \
 				 (CTX_PGSZ_BITS << CTX_PGSZ1_SHIFT))
 
-#if defined(CONFIG_SPARC64_PAGE_SIZE_8KB)
+#if defined(CONFIG_PAGE_SIZE_8KB)
 #define CTX_PGSZ_BASE	CTX_PGSZ_8KB
-#elif defined(CONFIG_SPARC64_PAGE_SIZE_64KB)
+#elif defined(CONFIG_PAGE_SIZE_64KB)
 #define CTX_PGSZ_BASE	CTX_PGSZ_64KB
-#elif defined(CONFIG_SPARC64_PAGE_SIZE_512KB)
+#elif defined(CONFIG_PAGE_SIZE_512KB)
 #define CTX_PGSZ_BASE	CTX_PGSZ_512KB
-#elif defined(CONFIG_SPARC64_PAGE_SIZE_4MB)
+#elif defined(CONFIG_PAGE_SIZE_4MB)
 #define CTX_PGSZ_BASE	CTX_PGSZ_4MB
 #else
 #error No page size specified in kernel configuration

diff -puN arch/sparc64/mm/tsb.c~sparc64 arch/sparc64/mm/tsb.c
@@ -90,16 +90,16 @@ void flush_tsb_user(struct mmu_gather *m
 	spin_unlock_irqrestore(&mm->context.lock, flags);
 }
 
-#if defined(CONFIG_SPARC64_PAGE_SIZE_8KB)
+#if defined(CONFIG_PAGE_SIZE_8KB)
 #define HV_PGSZ_IDX_BASE	HV_PGSZ_IDX_8K
 #define HV_PGSZ_MASK_BASE	HV_PGSZ_MASK_8K
-#elif defined(CONFIG_SPARC64_PAGE_SIZE_64KB)
+#elif defined(CONFIG_PAGE_SIZE_64KB)
 #define HV_PGSZ_IDX_BASE	HV_PGSZ_IDX_64K
 #define HV_PGSZ_MASK_BASE	HV_PGSZ_MASK_64K
-#elif defined(CONFIG_SPARC64_PAGE_SIZE_512KB)
+#elif defined(CONFIG_PAGE_SIZE_512KB)
 #define HV_PGSZ_IDX_BASE	HV_PGSZ_IDX_512K
 #define HV_PGSZ_MASK_BASE	HV_PGSZ_MASK_512K
-#elif defined(CONFIG_SPARC64_PAGE_SIZE_4MB)
+#elif defined(CONFIG_PAGE_SIZE_4MB)
 #define HV_PGSZ_IDX_BASE	HV_PGSZ_IDX_4MB
 #define HV_PGSZ_MASK_BASE	HV_PGSZ_MASK_4MB
 #else

diff -puN include/asm-mips/page.h~mips include/asm-mips/page.h
@@ -9,6 +9,7 @@
 #ifndef _ASM_PAGE_H
 #define _ASM_PAGE_H
 
+#include <asm-generic/page.h>
 
 #ifdef __KERNEL__
 

@@ -16,25 +17,6 @@
 
 #endif
 
-/*
- * PAGE_SHIFT determines the page size
- */
-#ifdef CONFIG_PAGE_SIZE_4KB
-#define PAGE_SHIFT	12
-#endif
-#ifdef CONFIG_PAGE_SIZE_8KB
-#define PAGE_SHIFT	13
-#endif
-#ifdef CONFIG_PAGE_SIZE_16KB
-#define PAGE_SHIFT	14
-#endif
-#ifdef CONFIG_PAGE_SIZE_64KB
-#define PAGE_SHIFT	16
-#endif
-#define PAGE_SIZE	(1UL << PAGE_SHIFT)
-#define PAGE_MASK       (~((1 << PAGE_SHIFT) - 1))
-
-
 #ifdef __KERNEL__
 #ifndef __ASSEMBLY__
 

@@ -130,9 +112,6 @@ typedef struct { unsigned long pgprot; }
 
 #endif /* !__ASSEMBLY__ */
 
-/* to align the pointer to the (next) page boundary */
-#define PAGE_ALIGN(addr)	(((addr) + PAGE_SIZE - 1) & PAGE_MASK)
-
 #define __pa(x)			((unsigned long) (x) - PAGE_OFFSET)
 #define __va(x)			((void *)((unsigned long) (x) + PAGE_OFFSET))
 

diff -puN include/asm-parisc/pgtable.h~parisc include/asm-parisc/pgtable.h
@@ -66,7 +66,7 @@
 #endif
 #define KERNEL_INITIAL_SIZE	(1 << KERNEL_INITIAL_ORDER)
 
-#if defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB)
+#if defined(CONFIG_64BIT) && defined(CONFIG_PAGE_SIZE_4KB)
 #define PT_NLEVELS	3
 #define PGD_ORDER	1 /* Number of pages per pgd */
 #define PMD_ORDER	1 /* Number of pages per pmd */

@@ -514,11 +514,11 @@ static inline void ptep_set_wrprotect(st
 #define _PAGE_SIZE_ENCODING_16M		6
 #define _PAGE_SIZE_ENCODING_64M		7
 
-#if defined(CONFIG_PARISC_PAGE_SIZE_4KB)
+#if defined(CONFIG_PAGE_SIZE_4KB)
 # define _PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_4K
-#elif defined(CONFIG_PARISC_PAGE_SIZE_16KB)
+#elif defined(CONFIG_PAGE_SIZE_16KB)
 # define _PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_16K
-#elif defined(CONFIG_PARISC_PAGE_SIZE_64KB)
+#elif defined(CONFIG_PAGE_SIZE_64KB)
 # define _PAGE_SIZE_ENCODING_DEFAULT _PAGE_SIZE_ENCODING_64K
 #endif
 

diff -puN include/asm-parisc/page.h~parisc include/asm-parisc/page.h
@@ -1,29 +1,10 @@
 #ifndef _PARISC_PAGE_H
 #define _PARISC_PAGE_H
 
-#if !defined(__KERNEL__)
-/* this is for userspace applications (4k page size) */
-# define PAGE_SHIFT	12	/* 4k */
-# define PAGE_SIZE	(1UL << PAGE_SHIFT)
-# define PAGE_MASK	(~(PAGE_SIZE-1))
-#endif
-
+#include <asm-generic/page.h>
 
 #ifdef __KERNEL__
 
-#if defined(CONFIG_PARISC_PAGE_SIZE_4KB)
-# define PAGE_SHIFT	12	/* 4k */
-#elif defined(CONFIG_PARISC_PAGE_SIZE_16KB)
-# define PAGE_SHIFT	14	/* 16k */
-#elif defined(CONFIG_PARISC_PAGE_SIZE_64KB)
-# define PAGE_SHIFT	16	/* 64k */
-#else
-# error "unknown default kernel page size"
-#endif
-#define PAGE_SIZE	(1UL << PAGE_SHIFT)
-#define PAGE_MASK	(~(PAGE_SIZE-1))
-
-
 #ifndef __ASSEMBLY__
 
 #include <asm/types.h>

@@ -140,10 +121,6 @@ extern int npmem_ranges;
 #define PMD_ENTRY_SIZE	(1UL << BITS_PER_PMD_ENTRY)
 #define PTE_ENTRY_SIZE	(1UL << BITS_PER_PTE_ENTRY)
 
-/* to align the pointer to the (next) page boundary */
-#define PAGE_ALIGN(addr)	(((addr)+PAGE_SIZE-1)&PAGE_MASK)
-
-
 #define LINUX_GATEWAY_SPACE     0
 
 /* This governs the relationship between virtual and physical addresses.

diff -puN arch/parisc/mm/init.c~parisc arch/parisc/mm/init.c
@@ -642,7 +642,7 @@ static void __init map_pages(unsigned lo
 				 * Map the fault vector writable so we can
 				 * write the HPMC checksum.
 				 */
-#if defined(CONFIG_PARISC_PAGE_SIZE_4KB)
+#if defined(CONFIG_PAGE_SIZE_4KB)
 				if (address >= ro_start && address < ro_end
 							&& address != fv_addr
 							&& address != gw_addr)

diff -puN include/asm-ppc/page.h~powerpc include/asm-ppc/page.h
@@ -3,16 +3,7 @@
 
 #include <linux/align.h>
 #include <asm/asm-compat.h>
-
-/* PAGE_SHIFT determines the page size */
-#define PAGE_SHIFT	12
-#define PAGE_SIZE	(ASM_CONST(1) << PAGE_SHIFT)
-
-/*
- * Subtle: this is an int (not an unsigned long) and so it
- * gets extended to 64 bits the way want (i.e. with 1s).  -- paulus
- */
-#define PAGE_MASK	(~((1 << PAGE_SHIFT) - 1))
+#include <asm-generic/page.h>
 
 #ifdef __KERNEL__
 

@@ -37,10 +28,6 @@ typedef unsigned long pte_basic_t;
 #define PTE_FMT		"%.8lx"
 #endif
 
-/* to align the pointer to the (next) page boundary */
-#define PAGE_ALIGN(addr)	ALIGN(addr, PAGE_SIZE)
-
-
 #undef STRICT_MM_TYPECHECKS
 
 #ifdef STRICT_MM_TYPECHECKS

diff -puN include/asm-powerpc/page.h~powerpc include/asm-powerpc/page.h
@@ -12,33 +12,14 @@
 
 #ifdef __KERNEL__
 #include <linux/align.h>
+#include <asm-generic/page.h>
 #include <asm/asm-compat.h>
 #include <asm/kdump.h>
 
-/*
- * On PPC32 page size is 4K. For PPC64 we support either 4K or 64K software
- * page size. When using 64K pages however, whether we are really supporting
- * 64K pages in HW or not is irrelevant to those definitions.
- */
-#ifdef CONFIG_PPC_64K_PAGES
-#define PAGE_SHIFT		16
-#else
-#define PAGE_SHIFT		12
-#endif
-
-#define PAGE_SIZE		(ASM_CONST(1) << PAGE_SHIFT)
-
 /* We do define AT_SYSINFO_EHDR but don't use the gate mechanism */
 #define __HAVE_ARCH_GATE_AREA		1
 
 /*
- * Subtle: (1 << PAGE_SHIFT) is an int, not an unsigned long. So if we
- * assign PAGE_MASK to a larger type it gets extended the way we want
- * (i.e. with 1s in the high bits)
- */
-#define PAGE_MASK      (~((1 << PAGE_SHIFT) - 1))
-
-/*
  * KERNELBASE is the virtual address of the start of the kernel, it's often
  * the same as PAGE_OFFSET, but _might not be_.
  *

@@ -90,9 +71,6 @@
 #include <asm/page_32.h>
 #endif
 
-/* to align the pointer to the (next) page boundary */
-#define PAGE_ALIGN(addr)	ALIGN(addr, PAGE_SIZE)
-
 /*
  * Don't compare things with KERNELBASE or PAGE_OFFSET to test for
  * "kernelness", use is_kernel_addr() - it should do what you want.

diff -puN arch/powerpc/boot/page.h~powerpc arch/powerpc/boot/page.h
@@ -28,7 +28,4 @@
 /* align addr on a size boundary - adjust address up if needed */
 #define _ALIGN(addr,size)     _ALIGN_UP(addr,size)
 
-/* to align the pointer to the (next) page boundary */
-#define PAGE_ALIGN(addr)	_ALIGN(addr, PAGE_SIZE)
-
 #endif				/* _PPC_BOOT_PAGE_H */

diff -puN include/asm-xtensa/page.h~arch-generic-PAGE_SIZE-give-every-arch-PAGE_SHIFT include/asm-xtensa/page.h
@@ -14,16 +14,7 @@
 #ifdef __KERNEL__
 
 #include <asm/processor.h>
-
-/*
- * PAGE_SHIFT determines the page size
- * PAGE_ALIGN(x) aligns the pointer to the (next) page boundary
- */
-
-#define PAGE_SHIFT		XCHAL_MMU_MIN_PTE_PAGE_SIZE
-#define PAGE_SIZE		(1 << PAGE_SHIFT)
-#define PAGE_MASK		(~(PAGE_SIZE-1))
-#define PAGE_ALIGN(addr)	(((addr)+PAGE_SIZE - 1) & PAGE_MASK)
+#include <asm-generic/page.h>
 
 #define DCACHE_WAY_SIZE		(XCHAL_DCACHE_SIZE / XCHAL_DCACHE_WAYS)
 #define PAGE_OFFSET		XCHAL_KSEG_CACHED_VADDR

diff -puN include/asm-x86_64/page.h~arch-generic-PAGE_SIZE-give-every-arch-PAGE_SHIFT include/asm-x86_64/page.h
@@ -1,15 +1,8 @@
 #ifndef _X86_64_PAGE_H
 #define _X86_64_PAGE_H
 
+#include <asm-generic/page.h>
 
-/* PAGE_SHIFT determines the page size */
-#define PAGE_SHIFT	12
-#ifdef __ASSEMBLY__
-#define PAGE_SIZE	(0x1 << PAGE_SHIFT)
-#else
-#define PAGE_SIZE	(1UL << PAGE_SHIFT)
-#endif
-#define PAGE_MASK	(~(PAGE_SIZE-1))
 #define PHYSICAL_PAGE_MASK	(~(PAGE_SIZE-1) & __PHYSICAL_MASK)
 
 #define THREAD_ORDER 1 

@@ -88,9 +81,6 @@ typedef struct { unsigned long pgprot; }
 #define __PAGE_OFFSET           0xffff810000000000
 #endif /* !__ASSEMBLY__ */
 
-/* to align the pointer to the (next) page boundary */
-#define PAGE_ALIGN(addr)	(((addr)+PAGE_SIZE-1)&PAGE_MASK)
-
 /* See Documentation/x86_64/mm.txt for a description of the memory map. */
 #define __PHYSICAL_MASK_SHIFT	46
 #define __PHYSICAL_MASK		((1UL << __PHYSICAL_MASK_SHIFT) - 1)

diff -puN include/asm-v850/page.h~arch-generic-PAGE_SIZE-give-every-arch-PAGE_SHIFT include/asm-v850/page.h
@@ -15,12 +15,7 @@
 #define __V850_PAGE_H__
 
 #include <asm/machdep.h>
-
-
-#define PAGE_SHIFT	12
-#define PAGE_SIZE       (1UL << PAGE_SHIFT)
-#define PAGE_MASK       (~(PAGE_SIZE-1))
-
+#include <asm-generic/page.h>
 
 /*
  * PAGE_OFFSET -- the first address of the first page of memory. For archs with

@@ -93,11 +88,6 @@ typedef unsigned long pgprot_t;
 
 #endif /* !__ASSEMBLY__ */
 
-
-/* to align the pointer to the (next) page boundary */
-#define PAGE_ALIGN(addr)	(((addr) + PAGE_SIZE - 1) & PAGE_MASK)
-
-
 /* No current v850 processor has virtual memory.  */
 #define __virt_to_phys(addr)	(addr)
 #define __phys_to_virt(addr)	(addr)

diff -puN include/asm-um/page.h~arch-generic-PAGE_SIZE-give-every-arch-PAGE_SHIFT include/asm-um/page.h
@@ -10,11 +10,7 @@
 struct page;
 
 #include <asm/vm-flags.h>
-
-/* PAGE_SHIFT determines the page size */
-#define PAGE_SHIFT	12
-#define PAGE_SIZE	(1UL << PAGE_SHIFT)
-#define PAGE_MASK	(~(PAGE_SIZE-1))
+#include <asm-generic/page.h>
 
 /*
  * These are used to make use of C type-checking..

@@ -85,9 +81,6 @@ typedef struct { unsigned long pgprot; }
 #define __pgd(x) ((pgd_t) { (x) } )
 #define __pgprot(x)	((pgprot_t) { (x) } )
 
-/* to align the pointer to the (next) page boundary */
-#define PAGE_ALIGN(addr)	(((addr)+PAGE_SIZE-1)&PAGE_MASK)
-
 extern unsigned long uml_physmem;
 
 #define PAGE_OFFSET (uml_physmem)

diff -puN include/asm-sparc/page.h~arch-generic-PAGE_SIZE-give-every-arch-PAGE_SHIFT include/asm-sparc/page.h
@@ -8,18 +8,7 @@
 #ifndef _SPARC_PAGE_H
 #define _SPARC_PAGE_H
 
-#ifdef CONFIG_SUN4
-#define PAGE_SHIFT   13
-#else
-#define PAGE_SHIFT   12
-#endif
-#ifndef __ASSEMBLY__
-/* I have my suspicions... -DaveM */
-#define PAGE_SIZE    (1UL << PAGE_SHIFT)
-#else
-#define PAGE_SIZE    (1 << PAGE_SHIFT)
-#endif
-#define PAGE_MASK    (~(PAGE_SIZE-1))
+#include <asm-generic/page.h>
 
 #ifdef __KERNEL__
 

@@ -137,9 +126,6 @@ BTFIXUPDEF_SETHI(sparc_unmapped_base)
 
 #endif /* !(__ASSEMBLY__) */
 
-/* to align the pointer to the (next) page boundary */
-#define PAGE_ALIGN(addr)  (((addr)+PAGE_SIZE-1)&PAGE_MASK)
-
 #define PAGE_OFFSET	0xf0000000
 #ifndef __ASSEMBLY__
 extern unsigned long phys_base;

diff -puN include/asm-sh64/page.h~arch-generic-PAGE_SIZE-give-every-arch-PAGE_SHIFT include/asm-sh64/page.h
@@ -17,15 +17,8 @@
  *
  */
 
+#include <asm-generic/page.h>
 
-/* PAGE_SHIFT determines the page size */
-#define PAGE_SHIFT	12
-#ifdef __ASSEMBLY__
-#define PAGE_SIZE	4096
-#else
-#define PAGE_SIZE	(1UL << PAGE_SHIFT)
-#endif
-#define PAGE_MASK	(~(PAGE_SIZE-1))
 #define PTE_MASK	PAGE_MASK
 
 #if defined(CONFIG_HUGETLB_PAGE_SIZE_64K)

@@ -85,9 +78,6 @@ typedef struct { unsigned long pgprot; }
 
 #endif /* !__ASSEMBLY__ */
 
-/* to align the pointer to the (next) page boundary */
-#define PAGE_ALIGN(addr)	(((addr)+PAGE_SIZE-1)&PAGE_MASK)
-
 /*
  * Kconfig defined.
  */

diff -puN include/asm-sh/page.h~arch-generic-PAGE_SIZE-give-every-arch-PAGE_SHIFT include/asm-sh/page.h
@@ -13,11 +13,8 @@
    [ P4 control   ]		0xE0000000
  */
 
+#include <asm-generic/page.h>
 
-/* PAGE_SHIFT determines the page size */
-#define PAGE_SHIFT	12
-#define PAGE_SIZE	(1UL << PAGE_SHIFT)
-#define PAGE_MASK	(~(PAGE_SIZE-1))
 #define PTE_MASK	PAGE_MASK
 
 #if defined(CONFIG_HUGETLB_PAGE_SIZE_64K)

@@ -79,9 +76,6 @@ typedef struct { unsigned long pgprot; }
 
 #endif /* !__ASSEMBLY__ */
 
-/* to align the pointer to the (next) page boundary */
-#define PAGE_ALIGN(addr)	(((addr)+PAGE_SIZE-1)&PAGE_MASK)
-
 /*
  * IF YOU CHANGE THIS, PLEASE ALSO CHANGE
  *

diff -puN include/asm-s390/page.h~arch-generic-PAGE_SIZE-give-every-arch-PAGE_SHIFT include/asm-s390/page.h
@@ -10,11 +10,8 @@
 #define _S390_PAGE_H
 
 #include <asm/types.h>
+#include <asm-generic/page.h>
 
-/* PAGE_SHIFT determines the page size */
-#define PAGE_SHIFT      12
-#define PAGE_SIZE       (1UL << PAGE_SHIFT)
-#define PAGE_MASK       (~(PAGE_SIZE-1))
 #define PAGE_DEFAULT_ACC	0
 #define PAGE_DEFAULT_KEY	(PAGE_DEFAULT_ACC << 4)
 

@@ -174,9 +171,6 @@ page_get_storage_key(unsigned long addr)
 
 #endif /* !__ASSEMBLY__ */
 
-/* to align the pointer to the (next) page boundary */
-#define PAGE_ALIGN(addr)        (((addr)+PAGE_SIZE-1)&PAGE_MASK)
-
 #define __PAGE_OFFSET           0x0UL
 #define PAGE_OFFSET             0x0UL
 #define __pa(x)                 (unsigned long)(x)

diff -puN include/asm-m68knommu/page.h~arch-generic-PAGE_SIZE-give-every-arch-PAGE_SHIFT include/asm-m68knommu/page.h
@@ -1,12 +1,7 @@
 #ifndef _M68KNOMMU_PAGE_H
 #define _M68KNOMMU_PAGE_H
 
-
-/* PAGE_SHIFT determines the page size */
-
-#define PAGE_SHIFT	(12)
-#define PAGE_SIZE	(1UL << PAGE_SHIFT)
-#define PAGE_MASK	(~(PAGE_SIZE-1))
+#include <asm-generic/page.h>
 
 #ifdef __KERNEL__
 

@@ -44,9 +39,6 @@ typedef struct { unsigned long pgprot; }
 #define __pgd(x)	((pgd_t) { (x) } )
 #define __pgprot(x)	((pgprot_t) { (x) } )
 
-/* to align the pointer to the (next) page boundary */
-#define PAGE_ALIGN(addr)	(((addr)+PAGE_SIZE-1)&PAGE_MASK)
-
 extern unsigned long memory_start;
 extern unsigned long memory_end;
 

diff -puN include/asm-m68k/page.h~arch-generic-PAGE_SIZE-give-every-arch-PAGE_SHIFT include/asm-m68k/page.h
@@ -1,22 +1,7 @@
 #ifndef _M68K_PAGE_H
 #define _M68K_PAGE_H
 
-
-/* PAGE_SHIFT determines the page size */
-#ifndef CONFIG_SUN3
-#define PAGE_SHIFT	(12)
-#else
-#define PAGE_SHIFT	(13)
-#endif
-#ifdef __ASSEMBLY__
-#define PAGE_SIZE	(1 << PAGE_SHIFT)
-#else
-#define PAGE_SIZE	(1UL << PAGE_SHIFT)
-#endif
-#define PAGE_MASK	(~(PAGE_SIZE-1))
-
-#ifdef __KERNEL__
-
+#include <asm-generic/page.h>
 #include <asm/setup.h>
 
 #if PAGE_SHIFT < 13

@@ -103,9 +88,6 @@ typedef struct { unsigned long pgprot; }
 #define __pgd(x)	((pgd_t) { (x) } )
 #define __pgprot(x)	((pgprot_t) { (x) } )
 
-/* to align the pointer to the (next) page boundary */
-#define PAGE_ALIGN(addr)	(((addr)+PAGE_SIZE-1)&PAGE_MASK)
-
 #endif /* !__ASSEMBLY__ */
 
 #include <asm/page_offset.h>

diff -puN include/asm-m32r/page.h~arch-generic-PAGE_SIZE-give-every-arch-PAGE_SHIFT include/asm-m32r/page.h
@@ -41,9 +41,6 @@ typedef struct { unsigned long pgprot; }
 
 #endif /* !__ASSEMBLY__ */
 
-/* to align the pointer to the (next) page boundary */
-#define PAGE_ALIGN(addr)	(((addr) + PAGE_SIZE - 1) & PAGE_MASK)
-
 /*
  * This handles the memory map.. We could make this a config
  * option, but too many people screw it up, and too few need

diff -puN include/asm-i386/page.h~arch-generic-PAGE_SIZE-give-every-arch-PAGE_SHIFT include/asm-i386/page.h
@@ -1,10 +1,7 @@
 #ifndef _I386_PAGE_H
 #define _I386_PAGE_H
 
-/* PAGE_SHIFT determines the page size */
-#define PAGE_SHIFT	12
-#define PAGE_SIZE	(1UL << PAGE_SHIFT)
-#define PAGE_MASK	(~(PAGE_SIZE-1))
+#include <asm-generic/page.h>
 
 #define LARGE_PAGE_MASK (~(LARGE_PAGE_SIZE-1))
 #define LARGE_PAGE_SIZE (1UL << PMD_SHIFT)

@@ -78,9 +75,6 @@ typedef struct { unsigned long pgprot; }
 
 #endif /* !__ASSEMBLY__ */
 
-/* to align the pointer to the (next) page boundary */
-#define PAGE_ALIGN(addr)	(((addr)+PAGE_SIZE-1)&PAGE_MASK)
-
 /*
  * This handles the memory map.. We could make this a config
  * option, but too many people screw it up, and too few need

diff -puN include/asm-h8300/page.h~arch-generic-PAGE_SIZE-give-every-arch-PAGE_SHIFT include/asm-h8300/page.h
@@ -1,16 +1,10 @@
 #ifndef _H8300_PAGE_H
 #define _H8300_PAGE_H
 
-
-/* PAGE_SHIFT determines the page size */
-
-#define PAGE_SHIFT	(12)
-#define PAGE_SIZE	(1UL << PAGE_SHIFT)
-#define PAGE_MASK	(~(PAGE_SIZE-1))
-
 #ifdef __KERNEL__
 
 #include <asm/setup.h>
+#include <asm-generic/page.h>
 
 #ifndef __ASSEMBLY__
  

@@ -44,9 +38,6 @@ typedef struct { unsigned long pgprot; }
 #define __pgd(x)	((pgd_t) { (x) } )
 #define __pgprot(x)	((pgprot_t) { (x) } )
 
-/* to align the pointer to the (next) page boundary */
-#define PAGE_ALIGN(addr)	(((addr)+PAGE_SIZE-1)&PAGE_MASK)
-
 extern unsigned long memory_start;
 extern unsigned long memory_end;
 

diff -puN include/asm-generic/page.h~arch-generic-PAGE_SIZE-give-every-arch-PAGE_SHIFT include/asm-generic/page.h
@@ -13,8 +13,6 @@
 #define ASM_CONST(x) __ASM_CONST(x)
 #endif
 
-#ifdef CONFIG_ARCH_GENERIC_PAGE_SIZE
-
 #define PAGE_SHIFT      CONFIG_PAGE_SHIFT
 #define PAGE_SIZE       (ASM_CONST(1) << PAGE_SHIFT)
 

@@ -28,8 +26,7 @@
 /* to align the pointer to the (next) page boundary */
 #define PAGE_ALIGN(addr)        ALIGN(addr, PAGE_SIZE)
 
-#endif /* CONFIG_ARCH_GENERIC_PAGE_SIZE */
-
+#ifndef __ASSEMBLY__
 #ifndef __ASSEMBLY__
 #ifndef CONFIG_ARCH_HAVE_GET_ORDER
 /* Pure 2^n version of get_order */

@@ -45,6 +42,7 @@ static __inline__ __attribute_const__ in
 	} while (size);
 	return order;
 }
+#endif /* __ASSEMBLY__ */
 
 #endif	/* CONFIG_ARCH_HAVE_GET_ORDER */
 #endif  /* __ASSEMBLY__ */

diff -puN include/asm-frv/page.h~arch-generic-PAGE_SIZE-give-every-arch-PAGE_SHIFT include/asm-frv/page.h
@@ -3,6 +3,7 @@
 
 #ifdef __KERNEL__
 
+#include <asm-generic/page.h>
 #include <asm/virtconvert.h>
 #include <asm/mem-layout.h>
 #include <asm/sections.h>

@@ -41,9 +42,6 @@ typedef struct { unsigned long	pgprot;	}
 #define __pgprot(x)	((pgprot_t) { (x) } )
 #define PTE_MASK	PAGE_MASK
 
-/* to align the pointer to the (next) page boundary */
-#define PAGE_ALIGN(addr)	(((addr) + PAGE_SIZE - 1) & PAGE_MASK)
-
 #define devmem_is_allowed(pfn)	1
 
 #define __pa(vaddr)		virt_to_phys((void *) (unsigned long) (vaddr))

diff -puN include/asm-frv/mem-layout.h~arch-generic-PAGE_SIZE-give-every-arch-PAGE_SHIFT include/asm-frv/mem-layout.h
@@ -12,25 +12,14 @@
 #ifndef _ASM_MEM_LAYOUT_H
 #define _ASM_MEM_LAYOUT_H
 
+#include <asm-generic/page.h>
+
 #ifndef __ASSEMBLY__
 #define __UL(X)	((unsigned long) (X))
 #else
 #define __UL(X)	(X)
 #endif
 
-/*
- * PAGE_SHIFT determines the page size
- */
-#define PAGE_SHIFT			14
-
-#ifndef __ASSEMBLY__
-#define PAGE_SIZE			(1UL << PAGE_SHIFT)
-#else
-#define PAGE_SIZE			(1 << PAGE_SHIFT)
-#endif
-
-#define PAGE_MASK			(~(PAGE_SIZE-1))
-
 /*****************************************************************************/
 /*
  * virtual memory layout from kernel's point of view

diff -puN include/asm-cris/page.h~arch-generic-PAGE_SIZE-give-every-arch-PAGE_SHIFT include/asm-cris/page.h
@@ -1,17 +1,9 @@
 #ifndef _CRIS_PAGE_H
 #define _CRIS_PAGE_H
 
+#include <asm-generic/page.h>
 #include <asm/arch/page.h>
 
-/* PAGE_SHIFT determines the page size */
-#define PAGE_SHIFT	13
-#ifndef __ASSEMBLY__
-#define PAGE_SIZE	(1UL << PAGE_SHIFT)
-#else
-#define PAGE_SIZE	(1 << PAGE_SHIFT)
-#endif
-#define PAGE_MASK	(~(PAGE_SIZE-1))
-
 #ifdef __KERNEL__
 
 #define clear_page(page)        memset((void *)(page), 0, PAGE_SIZE)

@@ -63,9 +55,6 @@ typedef struct { unsigned long pgprot; }
 
 #define page_to_phys(page)     __pa((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
 
-/* to align the pointer to the (next) page boundary */
-#define PAGE_ALIGN(addr)	(((addr)+PAGE_SIZE-1)&PAGE_MASK)
-
 #ifndef __ASSEMBLY__
 
 #endif /* __ASSEMBLY__ */

diff -puN include/asm-arm26/page.h~arch-generic-PAGE_SIZE-give-every-arch-PAGE_SHIFT include/asm-arm26/page.h
@@ -1,6 +1,7 @@
 #ifndef _ASMARM_PAGE_H
 #define _ASMARM_PAGE_H
 
+#include <asm-generic/page.h>
 
 #ifdef __KERNEL__
 #ifndef __ASSEMBLY__

@@ -79,12 +80,6 @@ typedef unsigned long pgprot_t;
 
 #define EXEC_PAGESIZE   32768
 
-#define PAGE_SIZE		(1UL << PAGE_SHIFT)
-#define PAGE_MASK		(~(PAGE_SIZE-1))
-
-/* to align the pointer to the (next) page boundary */
-#define PAGE_ALIGN(addr)	(((addr)+PAGE_SIZE-1)&PAGE_MASK)
-
 #ifdef __KERNEL__
 #ifndef __ASSEMBLY__
 

diff -puN include/asm-arm/page.h~arch-generic-PAGE_SIZE-give-every-arch-PAGE_SHIFT include/asm-arm/page.h
@@ -10,17 +10,10 @@
 #ifndef _ASMARM_PAGE_H
 #define _ASMARM_PAGE_H
 
-
-/* PAGE_SHIFT determines the page size */
-#define PAGE_SHIFT		12
-#define PAGE_SIZE		(1UL << PAGE_SHIFT)
-#define PAGE_MASK		(~(PAGE_SIZE-1))
+#include <asm-generic/page.h>
 
 #ifdef __KERNEL__
 
-/* to align the pointer to the (next) page boundary */
-#define PAGE_ALIGN(addr)	(((addr)+PAGE_SIZE-1)&PAGE_MASK)
-
 #ifndef __ASSEMBLY__
 
 #ifndef CONFIG_MMU

diff -puN include/asm-arm/page-nommu.h~arch-generic-PAGE_SIZE-give-every-arch-PAGE_SHIFT include/asm-arm/page-nommu.h
@@ -42,9 +42,6 @@ typedef unsigned long pgprot_t;
 #define __pmd(x)        (x)
 #define __pgprot(x)     (x)
 
-/* to align the pointer to the (next) page boundary */
-#define PAGE_ALIGN(addr)	(((addr)+PAGE_SIZE-1)&PAGE_MASK)
-
 extern unsigned long memory_start;
 extern unsigned long memory_end;
 

diff -puN include/asm-alpha/page.h~arch-generic-PAGE_SIZE-give-every-arch-PAGE_SHIFT include/asm-alpha/page.h
@@ -2,11 +2,7 @@
 #define _ALPHA_PAGE_H
 
 #include <asm/pal.h>
-
-/* PAGE_SHIFT determines the page size */
-#define PAGE_SHIFT	13
-#define PAGE_SIZE	(1UL << PAGE_SHIFT)
-#define PAGE_MASK	(~(PAGE_SIZE-1))
+#include <asm-generic/page.h>
 
 #ifdef __KERNEL__
 

@@ -78,9 +74,6 @@ typedef unsigned long pgprot_t;
 
 #endif /* !__ASSEMBLY__ */
 
-/* to align the pointer to the (next) page boundary */
-#define PAGE_ALIGN(addr)	(((addr)+PAGE_SIZE-1)&PAGE_MASK)
-
 #define __pa(x)			((unsigned long) (x) - PAGE_OFFSET)
 #define __va(x)			((void *)((unsigned long) (x) + PAGE_OFFSET))
 #ifndef CONFIG_DISCONTIGMEM