diff options
author | Manfred Spraul <manfred@colorfullife.com> | 2008-09-07 10:57:22 -0400 |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2008-09-08 13:25:24 -0400 |
commit | e545a6140b698b2494daf0b32107bdcc5e901390 (patch) | |
tree | 63f302e25ba7a0705bbf051f3817fac8f8b98aba /arch/ia64/kernel/smpboot.c | |
parent | 7686ad5606f08d9dfb33a2087a36c8366366015b (diff) |
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/ia64/kernel/smpboot.c')
-rw-r--r-- | arch/ia64/kernel/smpboot.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/ia64/kernel/smpboot.c b/arch/ia64/kernel/smpboot.c index bcea81e432fd..333b58f218d0 100644 --- a/arch/ia64/kernel/smpboot.c +++ b/arch/ia64/kernel/smpboot.c | |||
@@ -401,6 +401,7 @@ smp_callin (void) | |||
401 | spin_lock(&vector_lock); | 401 | spin_lock(&vector_lock); |
402 | /* Setup the per cpu irq handling data structures */ | 402 | /* Setup the per cpu irq handling data structures */ |
403 | __setup_vector_irq(cpuid); | 403 | __setup_vector_irq(cpuid); |
404 | notify_cpu_starting(cpuid); | ||
404 | cpu_set(cpuid, cpu_online_map); | 405 | cpu_set(cpuid, cpu_online_map); |
405 | per_cpu(cpu_state, cpuid) = CPU_ONLINE; | 406 | per_cpu(cpu_state, cpuid) = CPU_ONLINE; |
406 | spin_unlock(&vector_lock); | 407 | spin_unlock(&vector_lock); |