diff options
| author | Yong Zhang <yong.zhang0@gmail.com> | 2012-05-29 09:15:59 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2012-06-05 17:27:12 +0200 |
| commit | 46ce7fbfdbe0be6aaf0e816331aac08a74a00e5a (patch) | |
| tree | a6017d310a9c049e3613533c0c45694d93701bba /arch/s390 | |
| parent | parisc: Smp: remove call to ipi_call_lock()/ipi_call_unlock() (diff) | |
| download | linux-46ce7fbfdbe0be6aaf0e816331aac08a74a00e5a.tar.xz linux-46ce7fbfdbe0be6aaf0e816331aac08a74a00e5a.zip | |
S390: Smp: remove call to ipi_call_lock()/ipi_call_unlock()
ipi_call_lock/unlock() lock resp. unlock call_function.lock. This lock
protects only the call_function data structure itself, but it's
completely unrelated to cpu_online_mask. The mask to which the IPIs
are sent is calculated before call_function.lock is taken in
smp_call_function_many(), so the locking around set_cpu_online() is
pointless and can be removed.
[ tglx: Massaged changelog ]
Signed-off-by: Yong Zhang <yong.zhang0@gmail.com>
Cc: ralf@linux-mips.org
Cc: sshtylyov@mvista.com
Cc: david.daney@cavium.com
Cc: nikunj@linux.vnet.ibm.com
Cc: paulmck@linux.vnet.ibm.com
Cc: axboe@kernel.dk
Cc: peterz@infradead.org
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: linux390@de.ibm.com
Cc: linux-s390@vger.kernel.org
Link: http://lkml.kernel.org/r/1338275765-3217-5-git-send-email-yong.zhang0@gmail.com
Acked-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/kernel/smp.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c index 15cca26ccb6c..8dca9c248ac7 100644 --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -717,9 +717,7 @@ static void __cpuinit smp_start_secondary(void *cpuvoid) init_cpu_vtimer(); pfault_init(); notify_cpu_starting(smp_processor_id()); - ipi_call_lock(); set_cpu_online(smp_processor_id(), true); - ipi_call_unlock(); local_irq_enable(); /* cpu_idle will call schedule for us */ cpu_idle(); |