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microblaze: Fix strncpy_from_user macro

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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>
This commit is contained in:
Michal Simek 2013-01-16 18:53:22 +01:00
parent 836dc9e3fb
commit 1de9e46c21
1 changed files with 4 additions and 5 deletions
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9
arch/microblaze/lib/uaccess_old.S
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@ -38,15 +38,14 @@ __strncpy_user:
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: