Commit 83e5d8f7 authored by Benjamin LaHaise's avatar Benjamin LaHaise Committed by Linus Torvalds
Browse files

[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: 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 1ad539b2

include/linux/page-flags.h

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

mm/page_alloc.c

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