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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2014-08-29 12:16:03 +0400
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2014-09-01 11:56:29 +0400
commit5da76157a4b7d5f595c846cf5e95f6d085b350e2 (patch)
tree2d9e927c86f531de405c8181ecc0835c04959b9e /arch/s390/kernel/vdso32
parent69928601676ff6f51ff71ba943f749afe7b1cbb2 (diff)
downloadlinux-5da76157a4b7d5f595c846cf5e95f6d085b350e2.tar.xz
s390/vdso: remove NULL pointer check from clock_gettime
The explicit NULL pointer check on the timespec argument is only required for clock_getres but not for clock_gettime. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/vdso32')
-rw-r--r--arch/s390/kernel/vdso32/clock_gettime.S10
1 files changed, 3 insertions, 7 deletions
diff --git a/arch/s390/kernel/vdso32/clock_gettime.S b/arch/s390/kernel/vdso32/clock_gettime.S
index 65fc3979c2f1..7cf18f8d4cb4 100644
--- a/arch/s390/kernel/vdso32/clock_gettime.S
+++ b/arch/s390/kernel/vdso32/clock_gettime.S
@@ -22,13 +22,11 @@ __kernel_clock_gettime:
basr %r5,0
0: al %r5,21f-0b(%r5) /* get &_vdso_data */
chi %r2,__CLOCK_REALTIME
- je 10f
+ je 11f
chi %r2,__CLOCK_MONOTONIC
jne 19f
/* CLOCK_MONOTONIC */
- ltr %r3,%r3
- jz 9f /* tp == NULL */
1: l %r4,__VDSO_UPD_COUNT+4(%r5) /* load update counter */
tml %r4,0x0001 /* pending update ? loop */
jnz 1b
@@ -67,12 +65,10 @@ __kernel_clock_gettime:
j 6b
8: st %r2,0(%r3) /* store tp->tv_sec */
st %r1,4(%r3) /* store tp->tv_nsec */
-9: lhi %r2,0
+ lhi %r2,0
br %r14
/* CLOCK_REALTIME */
-10: ltr %r3,%r3 /* tp == NULL */
- jz 18f
11: l %r4,__VDSO_UPD_COUNT+4(%r5) /* load update counter */
tml %r4,0x0001 /* pending update ? loop */
jnz 11b
@@ -111,7 +107,7 @@ __kernel_clock_gettime:
j 15b
17: st %r2,0(%r3) /* store tp->tv_sec */
st %r1,4(%r3) /* store tp->tv_nsec */
-18: lhi %r2,0
+ lhi %r2,0
br %r14
/* Fallback to system call */