From c2f29ea111e3344ed48257c2a142c3db514e1529 Mon Sep 17 00:00:00 2001
From: Benjamin LaHaise <bcrl@kvack.org>
Date: Tue, 21 Jun 2005 17:14:55 -0700
Subject: [PATCH] [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: Benjamin LaHaise <benjamin.c.lahaise@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
include/linux/page-flags.h | 2 +-
mm/page_alloc.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index f2ee9b2332e3da..f5a6695d4d2133 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -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 --git a/mm/page_alloc.c b/mm/page_alloc.c
index c976628f9d9507..10446a6463743f 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -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;
--
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