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>

diff --git a/arch/s390/kernel/vdso32/clock_gettime.S b/arch/s390/kernel/vdso32/clock_gettime.S
index 65fc397..7cf18f8 100644 (file)
--- 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 91940ed..3f34e09 100644 (file)
--- 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 */