From: Benjamin LaHaise 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 Signed-off-by: Andrew Morton --- include/linux/page-flags.h | 2 +- mm/page_alloc.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff -puN include/linux/page-flags.h~__mod_page_state-pass-unsigned-long-instead-of-unsigned include/linux/page-flags.h --- 25/include/linux/page-flags.h~__mod_page_state-pass-unsigned-long-instead-of-unsigned 2005-06-06 00:13:55.000000000 -0700 +++ 25-akpm/include/linux/page-flags.h 2005-06-06 00:13:55.000000000 -0700 @@ -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)) diff -puN mm/page_alloc.c~__mod_page_state-pass-unsigned-long-instead-of-unsigned mm/page_alloc.c --- 25/mm/page_alloc.c~__mod_page_state-pass-unsigned-long-instead-of-unsigned 2005-06-06 00:13:55.000000000 -0700 +++ 25-akpm/mm/page_alloc.c 2005-06-06 00:13:55.000000000 -0700 @@ -1158,7 +1158,7 @@ unsigned long __read_page_state(unsigned 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; _