From 5da76157a4b7d5f595c846cf5e95f6d085b350e2 Mon Sep 17 00:00:00 2001 From: Martin Schwidefsky Date: Fri, 29 Aug 2014 10:16:03 +0200 Subject: 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 --- arch/s390/kernel/vdso32/clock_gettime.S | 10 +++------- arch/s390/kernel/vdso64/clock_gettime.S | 10 +++------- 2 files changed, 6 insertions(+), 14 deletions(-) (limited to 'arch') 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 */ diff --git a/arch/s390/kernel/vdso64/clock_gettime.S b/arch/s390/kernel/vdso64/clock_gettime.S index 91940ed33a4a..3f34e09db5f4 100644 --- a/arch/s390/kernel/vdso64/clock_gettime.S +++ b/arch/s390/kernel/vdso64/clock_gettime.S @@ -21,7 +21,7 @@ __kernel_clock_gettime: .cfi_startproc larl %r5,_vdso_data cghi %r2,__CLOCK_REALTIME - je 4f + je 5f cghi %r2,__CLOCK_THREAD_CPUTIME_ID je 9f cghi %r2,-2 /* Per-thread CPUCLOCK with PID=0, VIRT=1 */ @@ -30,8 +30,6 @@ __kernel_clock_gettime: jne 12f /* CLOCK_MONOTONIC */ - ltgr %r3,%r3 - jz 3f /* tp == NULL */ 0: lg %r4,__VDSO_UPD_COUNT(%r5) /* load update counter */ tmll %r4,0x0001 /* pending update ? loop */ jnz 0b @@ -53,12 +51,10 @@ __kernel_clock_gettime: j 1b 2: stg %r0,0(%r3) /* store tp->tv_sec */ stg %r1,8(%r3) /* store tp->tv_nsec */ -3: lghi %r2,0 + lghi %r2,0 br %r14 /* CLOCK_REALTIME */ -4: ltr %r3,%r3 /* tp == NULL */ - jz 8f 5: lg %r4,__VDSO_UPD_COUNT(%r5) /* load update counter */ tmll %r4,0x0001 /* pending update ? loop */ jnz 5b @@ -80,7 +76,7 @@ __kernel_clock_gettime: j 6b 7: stg %r0,0(%r3) /* store tp->tv_sec */ stg %r1,8(%r3) /* store tp->tv_nsec */ -8: lghi %r2,0 + lghi %r2,0 br %r14 /* CLOCK_THREAD_CPUTIME_ID for this thread */ -- cgit v1.2.3