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authorTejun Heo <tj@kernel.org>2010-12-09 11:47:21 +0100
committerThomas Gleixner <tglx@linutronix.de>2010-12-10 13:46:26 +0100
commit0aa002fe602939370e9476e5ec32b562000a0425 (patch)
tree9328b22674ec6eab144e464274f9f635fef37666 /arch/x86/platform/sfi
parent0e3fa13f4ee110de007bca3bf395b77997319fc8 (diff)
x86: apic: Cleanup and simplify setup_local_APIC()
setup_local_APIC() is used to setup local APIC early during CPU initialization and already assumes that preemption is disabled on entry. However, The function unnecessarily disables and enables preemption and uses smp_processor_id() multiple times in and out of the nested preemption disabled section. This gives the wrong impression that the function might be able to handle being called with preemption enabled and/or migrated to another processor in the middle. Make it clear that the function is always called with preemption disabled, drop the confusing preemption disable block and call smp_processor_id() once at the beginning of the function. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Cyrill Gorcunov <gorcunov@gmail.com> Reviewed-by: Pekka Enberg <penberg@kernel.org> Cc: Yinghai Lu <yinghai@kernel.org> Cc: brgerst@gmail.com LKML-Reference: <4D00B3B9.7060702@kernel.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/platform/sfi')
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