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[PATCH] mm: consolidate get_order

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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 <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Stephen Rothwell 2005-09-03 15:54:30 -07:00 • committed by Linus Torvalds
commit fd4fd5aac1
22 changed files with 69 additions and 312 deletions
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16
include/asm-s390/page.h
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@ -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 */