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Commit e545a614 authored by Manfred Spraul's avatar Manfred Spraul Committed by Ingo Molnar
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kernel/cpu.c: create a CPU_STARTING cpu_chain notifier



Right now, there is no notifier that is called on a new cpu, before the new
cpu begins processing interrupts/softirqs.
Various kernel function would need that notification, e.g. kvm works around
by calling smp_call_function_single(), rcu polls cpu_online_map.

The patch adds a CPU_STARTING notification. It also adds a helper function
that sends the message to all cpu_chain handlers.

Tested on x86-64.
All other archs are untested. Especially on sparc, I'm not sure if I got
it right.

Signed-off-by: default avatarManfred Spraul <manfred@colorfullife.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 7686ad56
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