microblaze: Fix strncpy_from_user macro
Problem happens when len in strncpy_from_user is setup
and passing string has len-1 chars + \0 terminated
character. In this case was returned incorrect length
of the string.
It should always retunrs the length of the string
(not including the trailing NULL).
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/arch/microblaze/lib/uaccess_old.S b/arch/microblaze/lib/uaccess_old.S
index f085995..0e8cc27 100644
--- a/arch/microblaze/lib/uaccess_old.S
+++ b/arch/microblaze/lib/uaccess_old.S
@@ -38,15 +38,14 @@
addik r3,r7,0 /* temp_count = len */
1:
lbu r4,r6,r0
+ beqid r4,2f
sb r4,r5,r0
- addik r3,r3,-1
- beqi r3,2f /* break on len */
-
addik r5,r5,1
- bneid r4,1b
addik r6,r6,1 /* delay slot */
- addik r3,r3,1 /* undo "temp_count--" */
+
+ addik r3,r3,-1
+ bnei r3,1b /* break on len */
2:
rsubk r3,r3,r7 /* temp_count = len - temp_count */
3: