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Commit 6bfa9bb5 authored by Andi Kleen's avatar Andi Kleen Committed by Linus Torvalds
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[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: default avatarAndi Kleen <ak@suse.de>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 2ee60e17

arch/x86_64/lib/memmove.c

+1 −1
Original line number Diff line number Diff line
@@ -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;

arch/x86_64/lib/usercopy.c

+1 −1
Original line number Diff line number Diff line
@@ -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);