From: Andi Kleen <ak@suse.de>
Date: Mon, 26 Jun 2006 11:59:47 +0000 (+0200)
Subject: [PATCH] x86_64: Minor string functions optimizations
X-Git-Tag: v2.6.18-rc1~612^2~7
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6bfa9bb5195c68f75bd3937e4d77cb0bfe852d0d;p=linux-2.6

[PATCH] x86_64: Minor string functions optimizations

 - Use tail call from clear_user to __clear_user to save some code size
 - Use standard memcpy for forward memmove

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/arch/x86_64/lib/memmove.c b/arch/x86_64/lib/memmove.c
index 517eb1bd9d..751ebae8ec 100644
--- a/arch/x86_64/lib/memmove.c
+++ b/arch/x86_64/lib/memmove.c
@@ -9,7 +9,7 @@
 void *memmove(void * dest,const void *src,size_t count)
 {
 	if (dest < src) { 
-		__inline_memcpy(dest,src,count);
+		return memcpy(dest,src,count);
 	} else {
 		char *p = (char *) dest + count;
 		char *s = (char *) src + count;
diff --git a/arch/x86_64/lib/usercopy.c b/arch/x86_64/lib/usercopy.c
index a82bfacdb1..893d43f838 100644
--- a/arch/x86_64/lib/usercopy.c
+++ b/arch/x86_64/lib/usercopy.c
@@ -55,7 +55,7 @@ strncpy_from_user(char *dst, const char __user *src, long count)
 {
 	long res = -EFAULT;
 	if (access_ok(VERIFY_READ, src, 1))
-		__do_strncpy_from_user(dst, src, count, res);
+		return __strncpy_from_user(dst, src, count);
 	return res;
 }
 EXPORT_SYMBOL(strncpy_from_user);