From: Benjamin LaHaise <bcrl@kvack.org>
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>
---
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~__read_page_state-pass-unsigned-long-instead-of-unsigned include/linux/page-flags.h
--- 25/include/linux/page-flags.h~__read_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
@@ -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) \
diff -puN mm/page_alloc.c~__read_page_state-pass-unsigned-long-instead-of-unsigned mm/page_alloc.c
--- 25/mm/page_alloc.c~__read_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
@@ -1144,7 +1144,7 @@ void get_full_page_state(struct page_sta
__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;
_