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authorYong Zhang <yong.zhang0@gmail.com>2012-05-29 15:16:04 +0800
committerThomas Gleixner <tglx@linutronix.de>2012-06-05 17:27:13 +0200
commit72ec61a9e8347375e37c05e23511173d8451c3d4 (patch)
treec9f17291be8d21c7a1b419a56f289cfa53aaf457 /kernel/smp.c
parentbc6833009583bd5b096ef7aa2bb006854a5a2dce (diff)
downloadlinux-72ec61a9e8347375e37c05e23511173d8451c3d4.tar.bz2
POWERPC: 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: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: linuxppc-dev@lists.ozlabs.org Link: http://lkml.kernel.org/r/1338275765-3217-10-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 'kernel/smp.c')
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