Commit c2f29ea1 authored by Benjamin LaHaise's avatar Benjamin LaHaise Committed by Linus Torvalds
Browse files

[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: default avatarBenjamin LaHaise <benjamin.c.lahaise@intel.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 83e5d8f7

include/linux/page-flags.h

+1 −1
Original line number Diff line number Diff line
@@ -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) \

mm/page_alloc.c

+1 −1
Original line number Diff line number Diff line
@@ -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;