diff options
| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2014-09-19 14:29:31 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2014-09-25 10:52:05 +0200 |
| commit | d59b93da5e572703e1a7311c13dd3472a4e56e30 (patch) | |
| tree | 4c75073780f54bc9785433256eee3d6d70eaf868 /arch/s390/kernel/smp.c | |
| parent | 46b05c7bd51edafb8c8da088b49bddf7f78d48f9 (diff) | |
s390/rwlock: use directed yield for write-locked rwlocks
Add an owner field to the arch_rwlock_t to be able to pass the timeslice
of a virtual CPU with diagnose 0x9c to the lock owner in case the rwlock
is write-locked. The undirected yield in case the rwlock is acquired
writable but the lock is read-locked is removed.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/smp.c')
| -rw-r--r-- | arch/s390/kernel/smp.c | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c index 243c7e512600..abec97b4ddbf 100644 --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -333,12 +333,6 @@ int smp_vcpu_scheduled(int cpu) return pcpu_running(pcpu_devices + cpu); } -void smp_yield(void) -{ - if (MACHINE_HAS_DIAG44) - asm volatile("diag 0,0,0x44"); -} - void smp_yield_cpu(int cpu) { if (MACHINE_HAS_DIAG9C) |