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[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>
This commit is contained in:
Stephen Rothwell 2005-09-03 15:54:30 -07:00 committed by Linus Torvalds
parent 28ae55c98e
commit fd4fd5aac1
22 changed files with 69 additions and 312 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
include/asm-alpha/page.h
View File

@ -63,20 +63,6 @@ typedef unsigned long pgprot_t;
#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 @@ extern __inline__ int get_order(unsigned long size)
#endif /* __KERNEL__ */
#include <asm-generic/page.h>
#endif /* _ALPHA_PAGE_H */

16
include/asm-arm/page.h
View File

@ -163,20 +163,6 @@ typedef unsigned long pgprot_t;
/* 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 @@ static inline int get_order(unsigned long size)
#endif /* __KERNEL__ */
#include <asm-generic/page.h>
#endif

16
include/asm-arm26/page.h
View File

@ -89,20 +89,6 @@ typedef unsigned long pgprot_t;
#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 @@ static inline int get_order(unsigned long size)
#endif /* __KERNEL__ */
#include <asm-generic/page.h>
#endif

15
include/asm-cris/page.h
View File

@ -70,19 +70,6 @@ typedef struct { unsigned long pgprot; } pgprot_t;
#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 @@ static inline int get_order(unsigned long size)
#endif /* __KERNEL__ */
#include <asm-generic/page.h>
#endif /* _CRIS_PAGE_H */

17
include/asm-frv/page.h
View File

@ -45,21 +45,6 @@ typedef struct { unsigned long pgprot; } pgprot_t;
/* 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 @@ extern unsigned long max_pfn;
#define WANT_PAGE_VIRTUAL 1
#endif
#include <asm-generic/page.h>
#endif /* _ASM_PAGE_H */

26
include/asm-generic/page.h Normal file
View File

@ -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 */

16
include/asm-h8300/page.h
View File

@ -54,20 +54,6 @@ typedef struct { unsigned long pgprot; } pgprot_t;
/* 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 @@ extern unsigned long memory_end;
#endif /* __KERNEL__ */
#include <asm-generic/page.h>
#endif /* _H8300_PAGE_H */

16
include/asm-i386/page.h
View File

@ -104,20 +104,6 @@ typedef struct { unsigned long pgprot; } pgprot_t;
*/
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 @@ extern int page_is_ram(unsigned long pagenr);
#endif /* __KERNEL__ */
#include <asm-generic/page.h>
#endif /* _I386_PAGE_H */

21
include/asm-m32r/page.h
View File

@ -61,25 +61,6 @@ typedef struct { unsigned long pgprot; } pgprot_t;
/* 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 @@ static __inline__ int get_order(unsigned long size)
#endif /* __KERNEL__ */
#include <asm-generic/page.h>
#endif /* _ASM_M32R_PAGE_H */

16
include/asm-m68k/page.h
View File

@ -107,20 +107,6 @@ typedef struct { unsigned long pgprot; } pgprot_t;
/* 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 @@ static inline void *__va(unsigned long x)
#endif /* __KERNEL__ */
#include <asm-generic/page.h>
#endif /* _M68K_PAGE_H */

16
include/asm-m68knommu/page.h
View File

@ -48,20 +48,6 @@ typedef struct { unsigned long pgprot; } pgprot_t;
/* 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 @@ extern unsigned long memory_end;
#endif /* __KERNEL__ */
#include <asm-generic/page.h>
#endif /* _M68KNOMMU_PAGE_H */

16
include/asm-mips/page.h
View File

@ -103,20 +103,6 @@ typedef struct { unsigned long pgprot; } pgprot_t;
#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 @@ static __inline__ int get_order(unsigned long size)
#define WANT_PAGE_VIRTUAL
#endif
#include <asm-generic/page.h>
#endif /* _ASM_PAGE_H */

16
include/asm-parisc/page.h
View File

@ -74,20 +74,6 @@ typedef struct { unsigned long pgprot; } pgprot_t;
#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 @@ extern int npmem_ranges;
#endif /* __KERNEL__ */
#include <asm-generic/page.h>
#endif /* _PARISC_PAGE_H */

17
include/asm-ppc64/page.h
View File

@ -172,20 +172,6 @@ typedef unsigned long pgprot_t;
#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 @@ extern u64 ppc64_pft_size; /* Log 2 of page table size */
VM_STACK_DEFAULT_FLAGS32 : VM_STACK_DEFAULT_FLAGS64)
#endif /* __KERNEL__ */
#include <asm-generic/page.h>
#endif /* _PPC64_PAGE_H */

16
include/asm-s390/page.h
View File

@ -111,20 +111,6 @@ static inline void copy_page(void *to, void *from)
#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 @@ page_get_storage_key(unsigned long addr)
#endif /* __KERNEL__ */
#include <asm-generic/page.h>
#endif /* _S390_PAGE_H */

20
include/asm-sh/page.h
View File

@ -122,24 +122,8 @@ typedef struct { unsigned long pgprot; } pgprot_t;
#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 */

20
include/asm-sh64/page.h
View File

@ -115,24 +115,8 @@ typedef struct { unsigned long pgprot; } pgprot_t;
#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 */

16
include/asm-sparc/page.h
View File

@ -132,20 +132,6 @@ BTFIXUPDEF_SETHI(sparc_unmapped_base)
#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 @@ extern unsigned long pfn_base;
#endif /* __KERNEL__ */
#include <asm-generic/page.h>
#endif /* _SPARC_PAGE_H */

16
include/asm-sparc64/page.h
View File

@ -150,20 +150,6 @@ struct sparc_phys_banks {
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 @@ static __inline__ int get_order(unsigned long size)
#endif /* !(__KERNEL__) */
#include <asm-generic/page.h>
#endif /* !(_SPARC64_PAGE_H) */

16
include/asm-um/page.h
View File

@ -116,24 +116,12 @@ extern void *to_virt(unsigned long phys);
#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

21
include/asm-v850/page.h
View File

@ -98,25 +98,6 @@ typedef unsigned long pgprot_t;
#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 @@ extern __inline__ int get_order (unsigned long size)
#endif /* KERNEL */
#include <asm-generic/page.h>
#endif /* __V850_PAGE_H__ */

16
include/asm-x86_64/page.h
View File

@ -92,20 +92,6 @@ typedef struct { unsigned long pgprot; } pgprot_t;
#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 @@ extern __inline__ int get_order(unsigned long size)
#endif /* __KERNEL__ */
#include <asm-generic/page.h>
#endif /* _X86_64_PAGE_H */