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| author | Manfred Spraul <manfred@colorfullife.com> | 2008-09-07 16:57:22 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-09-08 19:25:24 +0200 |
| commit | e545a6140b698b2494daf0b32107bdcc5e901390 (patch) | |
| tree | 63f302e25ba7a0705bbf051f3817fac8f8b98aba /arch/arm/kernel | |
| parent | 7686ad5606f08d9dfb33a2087a36c8366366015b (diff) | |
| download | op-kernel-dev-e545a6140b698b2494daf0b32107bdcc5e901390.zip op-kernel-dev-e545a6140b698b2494daf0b32107bdcc5e901390.tar.gz | |
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: Manfred Spraul <manfred@colorfullife.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/arm/kernel')
| -rw-r--r-- | arch/arm/kernel/smp.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c index e9842f6..e42a749 100644 --- a/arch/arm/kernel/smp.c +++ b/arch/arm/kernel/smp.c @@ -277,6 +277,7 @@ asmlinkage void __cpuinit secondary_start_kernel(void) /* * Enable local interrupts. */ + notify_cpu_starting(cpu); local_irq_enable(); local_fiq_enable(); |
