[PATCH] mm: consolidate get_order
Someone mentioned that almost all the architectures used basically the same
implementation of get_order. This patch consolidates them into
asm-generic/page.h and includes that in the appropriate places. The
exceptions are ia64 and ppc which have their own (presumably optimised)
versions.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/include/asm-alpha/page.h b/include/asm-alpha/page.h
index 0577daf..fa0b41b 100644
--- a/include/asm-alpha/page.h
+++ b/include/asm-alpha/page.h
@@ -63,20 +63,6 @@
#endif /* STRICT_MM_TYPECHECKS */
-/* Pure 2^n version of get_order */
-extern __inline__ int get_order(unsigned long size)
-{
- int order;
-
- size = (size-1) >> (PAGE_SHIFT-1);
- order = -1;
- do {
- size >>= 1;
- order++;
- } while (size);
- return order;
-}
-
#ifdef USE_48_BIT_KSEG
#define PAGE_OFFSET 0xffff800000000000UL
#else
@@ -112,4 +98,6 @@
#endif /* __KERNEL__ */
+#include <asm-generic/page.h>
+
#endif /* _ALPHA_PAGE_H */
diff --git a/include/asm-arm/page.h b/include/asm-arm/page.h
index 019c45d..4da1d53 100644
--- a/include/asm-arm/page.h
+++ b/include/asm-arm/page.h
@@ -163,20 +163,6 @@
/* the upper-most page table pointer */
extern pmd_t *top_pmd;
-/* Pure 2^n version of get_order */
-static inline int get_order(unsigned long size)
-{
- int order;
-
- size = (size-1) >> (PAGE_SHIFT-1);
- order = -1;
- do {
- size >>= 1;
- order++;
- } while (size);
- return order;
-}
-
#include <asm/memory.h>
#endif /* !__ASSEMBLY__ */
@@ -186,4 +172,6 @@
#endif /* __KERNEL__ */
+#include <asm-generic/page.h>
+
#endif
diff --git a/include/asm-arm26/page.h b/include/asm-arm26/page.h
index c334079..d3f23ac 100644
--- a/include/asm-arm26/page.h
+++ b/include/asm-arm26/page.h
@@ -89,20 +89,6 @@
#ifdef __KERNEL__
#ifndef __ASSEMBLY__
-/* Pure 2^n version of get_order */
-static inline int get_order(unsigned long size)
-{
- int order;
-
- size = (size-1) >> (PAGE_SHIFT-1);
- order = -1;
- do {
- size >>= 1;
- order++;
- } while (size);
- return order;
-}
-
#include <asm/memory.h>
#endif /* !__ASSEMBLY__ */
@@ -112,4 +98,6 @@
#endif /* __KERNEL__ */
+#include <asm-generic/page.h>
+
#endif
diff --git a/include/asm-cris/page.h b/include/asm-cris/page.h
index bbf17bd..c99c478 100644
--- a/include/asm-cris/page.h
+++ b/include/asm-cris/page.h
@@ -70,19 +70,6 @@
#ifndef __ASSEMBLY__
-/* Pure 2^n version of get_order */
-static inline int get_order(unsigned long size)
-{
- int order;
-
- size = (size-1) >> (PAGE_SHIFT-1);
- order = -1;
- do {
- size >>= 1;
- order++;
- } while (size);
- return order;
-}
#endif /* __ASSEMBLY__ */
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
@@ -90,5 +77,7 @@
#endif /* __KERNEL__ */
+#include <asm-generic/page.h>
+
#endif /* _CRIS_PAGE_H */
diff --git a/include/asm-frv/page.h b/include/asm-frv/page.h
index f7914f1..4feba56 100644
--- a/include/asm-frv/page.h
+++ b/include/asm-frv/page.h
@@ -45,21 +45,6 @@
/* to align the pointer to the (next) page boundary */
#define PAGE_ALIGN(addr) (((addr) + PAGE_SIZE - 1) & PAGE_MASK)
-/* Pure 2^n version of get_order */
-static inline int get_order(unsigned long size) __attribute_const__;
-static inline int get_order(unsigned long size)
-{
- int order;
-
- size = (size - 1) >> (PAGE_SHIFT - 1);
- order = -1;
- do {
- size >>= 1;
- order++;
- } while (size);
- return order;
-}
-
#define devmem_is_allowed(pfn) 1
#define __pa(vaddr) virt_to_phys((void *) vaddr)
@@ -102,4 +87,6 @@
#define WANT_PAGE_VIRTUAL 1
#endif
+#include <asm-generic/page.h>
+
#endif /* _ASM_PAGE_H */
diff --git a/include/asm-generic/page.h b/include/asm-generic/page.h
new file mode 100644
index 0000000..a96b5d9
--- /dev/null
+++ b/include/asm-generic/page.h
@@ -0,0 +1,26 @@
+#ifndef _ASM_GENERIC_PAGE_H
+#define _ASM_GENERIC_PAGE_H
+
+#ifdef __KERNEL__
+#ifndef __ASSEMBLY__
+
+#include <linux/compiler.h>
+
+/* Pure 2^n version of get_order */
+static __inline__ __attribute_const__ int get_order(unsigned long size)
+{
+ int order;
+
+ size = (size - 1) >> (PAGE_SHIFT - 1);
+ order = -1;
+ do {
+ size >>= 1;
+ order++;
+ } while (size);
+ return order;
+}
+
+#endif /* __ASSEMBLY__ */
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_GENERIC_PAGE_H */
diff --git a/include/asm-h8300/page.h b/include/asm-h8300/page.h
index e3b7960..e8c02b8 100644
--- a/include/asm-h8300/page.h
+++ b/include/asm-h8300/page.h
@@ -54,20 +54,6 @@
/* to align the pointer to the (next) page boundary */
#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
-/* Pure 2^n version of get_order */
-extern __inline__ int get_order(unsigned long size)
-{
- int order;
-
- size = (size-1) >> (PAGE_SHIFT-1);
- order = -1;
- do {
- size >>= 1;
- order++;
- } while (size);
- return order;
-}
-
extern unsigned long memory_start;
extern unsigned long memory_end;
@@ -101,4 +87,6 @@
#endif /* __KERNEL__ */
+#include <asm-generic/page.h>
+
#endif /* _H8300_PAGE_H */
diff --git a/include/asm-i386/page.h b/include/asm-i386/page.h
index 8d93f73..10045fd 100644
--- a/include/asm-i386/page.h
+++ b/include/asm-i386/page.h
@@ -104,20 +104,6 @@
*/
extern unsigned int __VMALLOC_RESERVE;
-/* Pure 2^n version of get_order */
-static __inline__ int get_order(unsigned long size)
-{
- int order;
-
- size = (size-1) >> (PAGE_SHIFT-1);
- order = -1;
- do {
- size >>= 1;
- order++;
- } while (size);
- return order;
-}
-
extern int sysctl_legacy_va_layout;
extern int page_is_ram(unsigned long pagenr);
@@ -156,4 +142,6 @@
#endif /* __KERNEL__ */
+#include <asm-generic/page.h>
+
#endif /* _I386_PAGE_H */
diff --git a/include/asm-m32r/page.h b/include/asm-m32r/page.h
index 1c6abb9..4ab5788 100644
--- a/include/asm-m32r/page.h
+++ b/include/asm-m32r/page.h
@@ -61,25 +61,6 @@
/* This handles the memory map.. */
-#ifndef __ASSEMBLY__
-
-/* Pure 2^n version of get_order */
-static __inline__ int get_order(unsigned long size)
-{
- int order;
-
- size = (size - 1) >> (PAGE_SHIFT - 1);
- order = -1;
- do {
- size >>= 1;
- order++;
- } while (size);
-
- return order;
-}
-
-#endif /* __ASSEMBLY__ */
-
#define __MEMORY_START CONFIG_MEMORY_START
#define __MEMORY_SIZE CONFIG_MEMORY_SIZE
@@ -111,5 +92,7 @@
#endif /* __KERNEL__ */
+#include <asm-generic/page.h>
+
#endif /* _ASM_M32R_PAGE_H */
diff --git a/include/asm-m68k/page.h b/include/asm-m68k/page.h
index 206313e..f206dfb 100644
--- a/include/asm-m68k/page.h
+++ b/include/asm-m68k/page.h
@@ -107,20 +107,6 @@
/* to align the pointer to the (next) page boundary */
#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
-/* Pure 2^n version of get_order */
-static inline int get_order(unsigned long size)
-{
- int order;
-
- size = (size-1) >> (PAGE_SHIFT-1);
- order = -1;
- do {
- size >>= 1;
- order++;
- } while (size);
- return order;
-}
-
#endif /* !__ASSEMBLY__ */
#include <asm/page_offset.h>
@@ -192,4 +178,6 @@
#endif /* __KERNEL__ */
+#include <asm-generic/page.h>
+
#endif /* _M68K_PAGE_H */
diff --git a/include/asm-m68knommu/page.h b/include/asm-m68knommu/page.h
index ff6a926..942dfbe 100644
--- a/include/asm-m68knommu/page.h
+++ b/include/asm-m68knommu/page.h
@@ -48,20 +48,6 @@
/* to align the pointer to the (next) page boundary */
#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
-/* Pure 2^n version of get_order */
-extern __inline__ int get_order(unsigned long size)
-{
- int order;
-
- size = (size-1) >> (PAGE_SHIFT-1);
- order = -1;
- do {
- size >>= 1;
- order++;
- } while (size);
- return order;
-}
-
extern unsigned long memory_start;
extern unsigned long memory_end;
@@ -93,4 +79,6 @@
#endif /* __KERNEL__ */
+#include <asm-generic/page.h>
+
#endif /* _M68KNOMMU_PAGE_H */
diff --git a/include/asm-mips/page.h b/include/asm-mips/page.h
index 5cae35c..652b6d6 100644
--- a/include/asm-mips/page.h
+++ b/include/asm-mips/page.h
@@ -103,20 +103,6 @@
#define __pgd(x) ((pgd_t) { (x) } )
#define __pgprot(x) ((pgprot_t) { (x) } )
-/* Pure 2^n version of get_order */
-static __inline__ int get_order(unsigned long size)
-{
- int order;
-
- size = (size-1) >> (PAGE_SHIFT-1);
- order = -1;
- do {
- size >>= 1;
- order++;
- } while (size);
- return order;
-}
-
#endif /* !__ASSEMBLY__ */
/* to align the pointer to the (next) page boundary */
@@ -148,4 +134,6 @@
#define WANT_PAGE_VIRTUAL
#endif
+#include <asm-generic/page.h>
+
#endif /* _ASM_PAGE_H */
diff --git a/include/asm-parisc/page.h b/include/asm-parisc/page.h
index 4a12692..44eae9f 100644
--- a/include/asm-parisc/page.h
+++ b/include/asm-parisc/page.h
@@ -74,20 +74,6 @@
#define __pgd(x) ((pgd_t) { (x) } )
#define __pgprot(x) ((pgprot_t) { (x) } )
-/* Pure 2^n version of get_order */
-extern __inline__ int get_order(unsigned long size)
-{
- int order;
-
- size = (size-1) >> (PAGE_SHIFT-1);
- order = -1;
- do {
- size >>= 1;
- order++;
- } while (size);
- return order;
-}
-
typedef struct __physmem_range {
unsigned long start_pfn;
unsigned long pages; /* PAGE_SIZE pages */
@@ -159,4 +145,6 @@
#endif /* __KERNEL__ */
+#include <asm-generic/page.h>
+
#endif /* _PARISC_PAGE_H */
diff --git a/include/asm-ppc64/page.h b/include/asm-ppc64/page.h
index a79a08d..a15422b 100644
--- a/include/asm-ppc64/page.h
+++ b/include/asm-ppc64/page.h
@@ -172,20 +172,6 @@
#endif
-/* Pure 2^n version of get_order */
-static inline int get_order(unsigned long size)
-{
- int order;
-
- size = (size-1) >> (PAGE_SHIFT-1);
- order = -1;
- do {
- size >>= 1;
- order++;
- } while (size);
- return order;
-}
-
#define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
extern int page_is_ram(unsigned long pfn);
@@ -270,4 +256,7 @@
VM_STACK_DEFAULT_FLAGS32 : VM_STACK_DEFAULT_FLAGS64)
#endif /* __KERNEL__ */
+
+#include <asm-generic/page.h>
+
#endif /* _PPC64_PAGE_H */
diff --git a/include/asm-s390/page.h b/include/asm-s390/page.h
index 2be287b..2430c56 100644
--- a/include/asm-s390/page.h
+++ b/include/asm-s390/page.h
@@ -111,20 +111,6 @@
#define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr)
#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
-/* Pure 2^n version of get_order */
-extern __inline__ int get_order(unsigned long size)
-{
- int order;
-
- size = (size-1) >> (PAGE_SHIFT-1);
- order = -1;
- do {
- size >>= 1;
- order++;
- } while (size);
- return order;
-}
-
/*
* These are used to make use of C type-checking..
*/
@@ -207,4 +193,6 @@
#endif /* __KERNEL__ */
+#include <asm-generic/page.h>
+
#endif /* _S390_PAGE_H */
diff --git a/include/asm-sh/page.h b/include/asm-sh/page.h
index 180467b..324e6cc 100644
--- a/include/asm-sh/page.h
+++ b/include/asm-sh/page.h
@@ -122,24 +122,8 @@
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
-#ifndef __ASSEMBLY__
-
-/* Pure 2^n version of get_order */
-static __inline__ int get_order(unsigned long size)
-{
- int order;
-
- size = (size-1) >> (PAGE_SHIFT-1);
- order = -1;
- do {
- size >>= 1;
- order++;
- } while (size);
- return order;
-}
-
-#endif
-
#endif /* __KERNEL__ */
+#include <asm-generic/page.h>
+
#endif /* __ASM_SH_PAGE_H */
diff --git a/include/asm-sh64/page.h b/include/asm-sh64/page.h
index d6167f1..c86df90 100644
--- a/include/asm-sh64/page.h
+++ b/include/asm-sh64/page.h
@@ -115,24 +115,8 @@
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
-#ifndef __ASSEMBLY__
-
-/* Pure 2^n version of get_order */
-extern __inline__ int get_order(unsigned long size)
-{
- int order;
-
- size = (size-1) >> (PAGE_SHIFT-1);
- order = -1;
- do {
- size >>= 1;
- order++;
- } while (size);
- return order;
-}
-
-#endif
-
#endif /* __KERNEL__ */
+#include <asm-generic/page.h>
+
#endif /* __ASM_SH64_PAGE_H */
diff --git a/include/asm-sparc/page.h b/include/asm-sparc/page.h
index 383060e..9122684 100644
--- a/include/asm-sparc/page.h
+++ b/include/asm-sparc/page.h
@@ -132,20 +132,6 @@
#define TASK_UNMAPPED_BASE BTFIXUP_SETHI(sparc_unmapped_base)
-/* Pure 2^n version of get_order */
-extern __inline__ int get_order(unsigned long size)
-{
- int order;
-
- size = (size-1) >> (PAGE_SHIFT-1);
- order = -1;
- do {
- size >>= 1;
- order++;
- } while (size);
- return order;
-}
-
#else /* !(__ASSEMBLY__) */
#define __pgprot(x) (x)
@@ -178,4 +164,6 @@
#endif /* __KERNEL__ */
+#include <asm-generic/page.h>
+
#endif /* _SPARC_PAGE_H */
diff --git a/include/asm-sparc64/page.h b/include/asm-sparc64/page.h
index b87dbbd..c9f8ef2 100644
--- a/include/asm-sparc64/page.h
+++ b/include/asm-sparc64/page.h
@@ -150,20 +150,6 @@
extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS];
-/* Pure 2^n version of get_order */
-static __inline__ int get_order(unsigned long size)
-{
- int order;
-
- size = (size-1) >> (PAGE_SHIFT-1);
- order = -1;
- do {
- size >>= 1;
- order++;
- } while (size);
- return order;
-}
-
#endif /* !(__ASSEMBLY__) */
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
@@ -171,4 +157,6 @@
#endif /* !(__KERNEL__) */
+#include <asm-generic/page.h>
+
#endif /* !(_SPARC64_PAGE_H) */
diff --git a/include/asm-um/page.h b/include/asm-um/page.h
index f58aeda..bd850a2 100644
--- a/include/asm-um/page.h
+++ b/include/asm-um/page.h
@@ -116,24 +116,12 @@
#define pfn_valid(pfn) ((pfn) < max_mapnr)
#define virt_addr_valid(v) pfn_valid(phys_to_pfn(__pa(v)))
-/* Pure 2^n version of get_order */
-static __inline__ int get_order(unsigned long size)
-{
- int order;
-
- size = (size-1) >> (PAGE_SHIFT-1);
- order = -1;
- do {
- size >>= 1;
- order++;
- } while (size);
- return order;
-}
-
extern struct page *arch_validate(struct page *page, int mask, int order);
#define HAVE_ARCH_VALIDATE
extern void arch_free_page(struct page *page, int order);
#define HAVE_ARCH_FREE_PAGE
+#include <asm-generic/page.h>
+
#endif
diff --git a/include/asm-v850/page.h b/include/asm-v850/page.h
index d609162..b4bc85e 100644
--- a/include/asm-v850/page.h
+++ b/include/asm-v850/page.h
@@ -98,25 +98,6 @@
#define PAGE_ALIGN(addr) (((addr) + PAGE_SIZE - 1) & PAGE_MASK)
-#ifndef __ASSEMBLY__
-
-/* Pure 2^n version of get_order */
-extern __inline__ int get_order (unsigned long size)
-{
- int order;
-
- size = (size-1) >> (PAGE_SHIFT-1);
- order = -1;
- do {
- size >>= 1;
- order++;
- } while (size);
- return order;
-}
-
-#endif /* !__ASSEMBLY__ */
-
-
/* No current v850 processor has virtual memory. */
#define __virt_to_phys(addr) (addr)
#define __phys_to_virt(addr) (addr)
@@ -144,4 +125,6 @@
#endif /* KERNEL */
+#include <asm-generic/page.h>
+
#endif /* __V850_PAGE_H__ */
diff --git a/include/asm-x86_64/page.h b/include/asm-x86_64/page.h
index 4313187..fcf890a 100644
--- a/include/asm-x86_64/page.h
+++ b/include/asm-x86_64/page.h
@@ -92,20 +92,6 @@
#include <asm/bug.h>
-/* Pure 2^n version of get_order */
-extern __inline__ int get_order(unsigned long size)
-{
- int order;
-
- size = (size-1) >> (PAGE_SHIFT-1);
- order = -1;
- do {
- size >>= 1;
- order++;
- } while (size);
- return order;
-}
-
#endif /* __ASSEMBLY__ */
#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
@@ -141,4 +127,6 @@
#endif /* __KERNEL__ */
+#include <asm-generic/page.h>
+
#endif /* _X86_64_PAGE_H */