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| author |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-12-02 14:54:56 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-12-02 15:31:10 +0100 |
| commit | b5e64b3de7fdd1db0a12871f7114fc1da899df8e (patch) | |
| tree | f6c7dae3006a8f16ecfea0d8f6b2ae0c83ea69df /arch/s390/kernel/vdso64/clock_getres.S | |
| parent | s390/vdso: fix access-list entry initialization (diff) | |
| download | linux-dev-b5e64b3de7fdd1db0a12871f7114fc1da899df8e.tar.xz linux-dev-b5e64b3de7fdd1db0a12871f7114fc1da899df8e.zip | |
s390/vdso: ectg gettime support for CLOCK_THREAD_CPUTIME_ID
The code to use the ECTG instruction to calculate the cputime for the
current thread is currently used only for the per-thread CPU-clock
with the clockid -2 (PID=0, VIRT=1). Use the same code for the clockid
CLOCK_THREAD_CPUTIME_ID to speed up the more common clockid as well.
Reported-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/vdso64/clock_getres.S')
| -rw-r--r-- | arch/s390/kernel/vdso64/clock_getres.S | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/s390/kernel/vdso64/clock_getres.S b/arch/s390/kernel/vdso64/clock_getres.S index 176e1f75f9aa..34deba7c7ed1 100644 --- a/arch/s390/kernel/vdso64/clock_getres.S +++ b/arch/s390/kernel/vdso64/clock_getres.S @@ -23,7 +23,9 @@ __kernel_clock_getres: je 0f cghi %r2,__CLOCK_MONOTONIC je 0f - cghi %r2,-2 /* CLOCK_THREAD_CPUTIME_ID for this thread */ + cghi %r2,__CLOCK_THREAD_CPUTIME_ID + je 0f + cghi %r2,-2 /* Per-thread CPUCLOCK with PID=0, VIRT=1 */ jne 2f larl %r5,_vdso_data icm %r0,15,__LC_ECTG_OK(%r5) |