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

By making the offset argument of __mod_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>
hifive-unleashed-5.1
Benjamin LaHaise 2005-06-21 17:14:54 -07:00 committed by Linus Torvalds
parent 1ad539b2bd
commit 83e5d8f725
2 changed files with 2 additions and 2 deletions
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2
include/linux/page-flags.h
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@ -136,7 +136,7 @@ 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 void __mod_page_state(unsigned offset, unsigned long delta);
extern void __mod_page_state(unsigned long offset, unsigned long delta);
#define read_page_state(member) \
__read_page_state(offsetof(struct page_state, member))

2
mm/page_alloc.c
View File

@ -1158,7 +1158,7 @@ unsigned long __read_page_state(unsigned offset)
return ret;
}
void __mod_page_state(unsigned offset, unsigned long delta)
void __mod_page_state(unsigned long offset, unsigned long delta)
{
unsigned long flags;
void* ptr;