From: Benjamin LaHaise <bcrl@kvack.org>
Date: Wed, 22 Jun 2005 00:14:55 +0000 (-0700)
Subject: [PATCH] __read_page_state(): pass unsigned long instead of unsigned
X-Git-Tag: v2.6.13-rc1~68^2~582^2~146
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c2f29ea111e3344ed48257c2a142c3db514e1529;p=linux-2.6

[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>
---

diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index f2ee9b2332..f5a6695d4d 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 c976628f9d..10446a6463 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;