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| author | Yong Zhang <yong.zhang0@gmail.com> | 2012-05-29 09:16:01 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2012-06-05 17:27:12 +0200 |
| commit | 3b6f70fd7dd4e19fc674ec99e389bf0da5589525 (patch) | |
| tree | 3e588946cf2a2448e0a59c02e46bdb1a7afaba82 /arch/ia64/kernel/smpboot.c | |
| parent | tile: SMP: Remove call to ipi_call_lock()/ipi_call_unlock() (diff) | |
| download | linux-3b6f70fd7dd4e19fc674ec99e389bf0da5589525.tar.xz linux-3b6f70fd7dd4e19fc674ec99e389bf0da5589525.zip | |
x86-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: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Link: http://lkml.kernel.org/r/1338275765-3217-7-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/ia64/kernel/smpboot.c')
0 files changed, 0 insertions, 0 deletions