From: Yong Zhang Date: Tue, 29 May 2012 08:27:33 +0000 (+0800) Subject: SPARC: SMP: Remove call to ipi_call_lock_irq()/ipi_call_unlock_irq() X-Git-Tag: v3.6-rc1~166^2~4 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bc6833009583bd5b096ef7aa2bb006854a5a2dce;p=pandora-kernel.git 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 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" Acked-by: Srivatsa S. Bhat Acked-by: Peter Zijlstra Signed-off-by: Thomas Gleixner --- Reading git-diff-tree failed