[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/usercopy.c b/arch/x86_64/lib/usercopy.c
index a82bfac..893d43f 100644
--- a/arch/x86_64/lib/usercopy.c
+++ b/arch/x86_64/lib/usercopy.c
@@ -55,7 +55,7 @@
{
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);