diff options
| author | Manfred Spraul | 2008-09-07 16:57:22 +0200 |
|---|---|---|
| committer | Ingo Molnar | 2008-09-08 19:25:24 +0200 |
| commit | e545a6140b698b2494daf0b32107bdcc5e901390 (patch) | |
| tree | 63f302e25ba7a0705bbf051f3817fac8f8b98aba /arch/powerpc/kernel/smp.c | |
| parent | Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dto... (diff) | |
| download | kernel-qcow2-linux-e545a6140b698b2494daf0b32107bdcc5e901390.tar.gz kernel-qcow2-linux-e545a6140b698b2494daf0b32107bdcc5e901390.tar.xz kernel-qcow2-linux-e545a6140b698b2494daf0b32107bdcc5e901390.zip | |
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/powerpc/kernel/smp.c')
| -rw-r--r-- | arch/powerpc/kernel/smp.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c index 5337ca7bb649..c27b10a1bd79 100644 --- a/arch/powerpc/kernel/smp.c +++ b/arch/powerpc/kernel/smp.c @@ -453,6 +453,7 @@ int __devinit start_secondary(void *unused) secondary_cpu_time_init(); ipi_call_lock(); + notify_cpu_starting(cpu); cpu_set(cpu, cpu_online_map); /* Update sibling maps */ base = cpu_first_thread_in_core(cpu); |