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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/m32r | |
| parent | 7686ad5606f08d9dfb33a2087a36c8366366015b (diff) | |
| download | linux-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/m32r')
| -rw-r--r-- | arch/m32r/kernel/smpboot.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/m32r/kernel/smpboot.c b/arch/m32r/kernel/smpboot.c index 2c03ac1d005f..fc2994811f15 100644 --- a/arch/m32r/kernel/smpboot.c +++ b/arch/m32r/kernel/smpboot.c @@ -498,6 +498,8 @@ static void __init smp_online(void) { int cpu_id = smp_processor_id(); + notify_cpu_starting(cpu_id); + local_irq_enable(); /* Get our bogomips. */ |