diff options
author | Vegard Nossum <vegard.nossum@gmail.com> | 2009-06-15 15:50:49 +0200 |
---|---|---|
committer | Vegard Nossum <vegard.nossum@gmail.com> | 2009-06-15 15:50:49 +0200 |
commit | 722f2a6c87f34ee0fd0130a8cf45f81e0705594a (patch) | |
tree | 50b054df34d2731eb0ba0cf1a6c27e43e7eed428 /arch/x86/kernel/smp.c | |
parent | 7a0aeb14e18ad59394bd9bbc6e57fb345819e748 (diff) | |
parent | 45e3e1935e2857c54783291107d33323b3ef33c8 (diff) |
Merge commit 'linus/master' into HEAD
Conflicts:
MAINTAINERS
Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>
Diffstat (limited to 'arch/x86/kernel/smp.c')
-rw-r--r-- | arch/x86/kernel/smp.c | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/arch/x86/kernel/smp.c b/arch/x86/kernel/smp.c index 28f5fb495a6..ec1de97600e 100644 --- a/arch/x86/kernel/smp.c +++ b/arch/x86/kernel/smp.c @@ -150,14 +150,40 @@ void native_send_call_func_ipi(const struct cpumask *mask) * this function calls the 'stop' function on all other CPUs in the system. */ +asmlinkage void smp_reboot_interrupt(void) +{ + ack_APIC_irq(); + irq_enter(); + stop_this_cpu(NULL); + irq_exit(); +} + static void native_smp_send_stop(void) { unsigned long flags; + unsigned long wait; if (reboot_force) return; - smp_call_function(stop_this_cpu, NULL, 0); + /* + * Use an own vector here because smp_call_function + * does lots of things not suitable in a panic situation. + * On most systems we could also use an NMI here, + * but there are a few systems around where NMI + * is problematic so stay with an non NMI for now + * (this implies we cannot stop CPUs spinning with irq off + * currently) + */ + if (num_online_cpus() > 1) { + apic->send_IPI_allbutself(REBOOT_VECTOR); + + /* Don't wait longer than a second */ + wait = USEC_PER_SEC; + while (num_online_cpus() > 1 && wait--) + udelay(1); + } + local_irq_save(flags); disable_local_APIC(); local_irq_restore(flags); |