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 <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent 83e5d8f7
......@@ -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) \
......@@ -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;
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment