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| author |   Yong Zhang <yong.zhang0@gmail.com> | 2012-05-29 16:27:33 +0800 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2012-06-05 17:27:13 +0200 |
| commit | bc6833009583bd5b096ef7aa2bb006854a5a2dce (patch) | |
| tree | e4499ab9851f6f24d748e58889cc3c76dc57e420 /kernel/smp.c | |
| parent | ia64: SMP: Remove call to ipi_call_lock_irq()/ipi_call_unlock_irq() (diff) | |
| download | linux-dev-bc6833009583bd5b096ef7aa2bb006854a5a2dce.tar.xz linux-dev-bc6833009583bd5b096ef7aa2bb006854a5a2dce.zip | |
SPARC: SMP: Remove call to ipi_call_lock_irq()/ipi_call_unlock_irq()
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.
Delay irq enable to after set_cpu_online().
[ 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: sparclinux@vger.kernel.org
Link: http://lkml.kernel.org/r/20120529082732.GA4250@zhy
Acked-by: "David S. Miller" <davem@davemloft.net>
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 'kernel/smp.c')
0 files changed, 0 insertions, 0 deletions