[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 517eb1b..751ebae 100644 (file)
--- 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 a82bfac..893d43f 100644 (file)
--- 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);