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| author | Yong Zhang <yong.zhang0@gmail.com> | 2012-05-29 15:16:02 +0800 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2012-06-05 17:27:13 +0200 |
| commit | 459165e25030c0023cb54f73c14261a3d2f4a244 (patch) | |
| tree | 26c7574f553f2aaf8fb18cb2efdb324bc092890a /arch/ia64 | |
| parent | 3b6f70fd7dd4e19fc674ec99e389bf0da5589525 (diff) | |
| download | blackbird-op-linux-459165e25030c0023cb54f73c14261a3d2f4a244.tar.gz blackbird-op-linux-459165e25030c0023cb54f73c14261a3d2f4a244.zip | |
ia64: 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.
[ 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: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: linux-ia64@vger.kernel.org
Link: http://lkml.kernel.org/r/1338275765-3217-8-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')
| -rw-r--r-- | arch/ia64/kernel/smpboot.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/ia64/kernel/smpboot.c b/arch/ia64/kernel/smpboot.c index 1113b8aba07f..963d2db53bfa 100644 --- a/arch/ia64/kernel/smpboot.c +++ b/arch/ia64/kernel/smpboot.c @@ -382,7 +382,6 @@ smp_callin (void) set_numa_node(cpu_to_node_map[cpuid]); set_numa_mem(local_memory_node(cpu_to_node_map[cpuid])); - ipi_call_lock_irq(); spin_lock(&vector_lock); /* Setup the per cpu irq handling data structures */ __setup_vector_irq(cpuid); @@ -390,7 +389,6 @@ smp_callin (void) set_cpu_online(cpuid, true); per_cpu(cpu_state, cpuid) = CPU_ONLINE; spin_unlock(&vector_lock); - ipi_call_unlock_irq(); smp_setup_percpu_timer(); |
