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[PATCH] __read_page_state(): pass unsigned long instead of unsigned 

By making the offset argument of __read_page_state an unsigned long instead of
unsigned, we can avoid forcing the compiler to sign extend a usually constant
argument.  This saves 1 instruction on x86-64.

Signed-off-by: Benjamin LaHaise <benjamin.c.lahaise@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Benjamin LaHaise 2005-06-21 17:14:55 -07:00 committed by Linus Torvalds
parent 83e5d8f725
commit c2f29ea111
2 changed files with 2 additions and 2 deletions
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2
include/linux/page-flags.h
View File

@ -135,7 +135,7 @@ struct page_state {
extern void get_page_state(struct page_state *ret);
extern void get_full_page_state(struct page_state *ret);
extern unsigned long __read_page_state(unsigned offset);
extern unsigned long __read_page_state(unsigned long offset);
extern void __mod_page_state(unsigned long offset, unsigned long delta);
#define read_page_state(member) \

2
mm/page_alloc.c
View File

@ -1144,7 +1144,7 @@ void get_full_page_state(struct page_state *ret)
__get_page_state(ret, sizeof(*ret) / sizeof(unsigned long));
}
unsigned long __read_page_state(unsigned offset)
unsigned long __read_page_state(unsigned long offset)
{
unsigned long ret = 0;
int cpu;