Blackfin: strncpy: fix handling of zero lengths

realmz · vapier · commit 5ff6197f828d · 2011-06-03T11:05:36.000-04:00
The jump to 4f will cause the NUL padding loop to run at least one time,
so if string length is zero just jump to the end.  Otherwise we wrongly
write one NUL byte when size==0.

Signed-off-by: Steven Miao &lt;realmz6@gmail.com&gt;
Signed-off-by: Mike Frysinger &lt;vapier@gentoo.org&gt;
diff --git a/arch/blackfin/lib/strncpy.S b/arch/blackfin/lib/strncpy.S
@@ -25,7 +25,7 @@
 
 ENTRY(_strncpy)
 	CC = R2 == 0;
-	if CC JUMP 4f;
+	if CC JUMP 6f;
 
 	P2 = R2 ;       /* size */
 	P0 = R0 ;       /* dst*/
