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| author | Eduardo Habkost <ehabkost@redhat.com> | 2008-11-12 14:34:43 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-11-12 18:55:48 +0100 |
| commit | bb8dd270e62217e2d2172094c6c352c4ddc0a127 (patch) | |
| tree | b57d4afb0b36564b0af62fd5306837e26f326595 /arch/x86/kernel/reboot.c | |
| parent | x86: move nmi_shootdown_cpus() to reboot.c (diff) | |
| download | linux-bb8dd270e62217e2d2172094c6c352c4ddc0a127.tar.xz linux-bb8dd270e62217e2d2172094c6c352c4ddc0a127.zip | |
x86: make nmi_shootdown_cpus() available on !SMP and !X86_LOCAL_APIC
Impact: widen nmi_shootdown_cpus() availability
The X86_LOCAL_APIC #ifdef was for kdump. For !SMP, the function simply
does nothing.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/reboot.c')
| -rw-r--r-- | arch/x86/kernel/reboot.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c index 364edeecc235..17a41e055565 100644 --- a/arch/x86/kernel/reboot.c +++ b/arch/x86/kernel/reboot.c @@ -519,7 +519,7 @@ void machine_crash_shutdown(struct pt_regs *regs) #endif -#if defined(CONFIG_SMP) && defined(CONFIG_X86_LOCAL_APIC) +#if defined(CONFIG_SMP) /* This keeps a track of which one is crashing cpu. */ static int crashing_cpu; @@ -568,6 +568,12 @@ static struct notifier_block crash_nmi_nb = { .notifier_call = crash_nmi_callback, }; +/* Halt all other CPUs, calling the specified function on each of them + * + * This function can be used to halt all other CPUs on crash + * or emergency reboot time. The function passed as parameter + * will be called inside a NMI handler on all CPUs. + */ void nmi_shootdown_cpus(nmi_shootdown_cb callback) { unsigned long msecs; @@ -596,4 +602,9 @@ void nmi_shootdown_cpus(nmi_shootdown_cb callback) /* Leave the nmi callback set */ } +#else /* !CONFIG_SMP */ +void nmi_shootdown_cpus(nmi_shootdown_cb callback) +{ + /* No other CPUs to shoot down */ +} #endif |