[PATCH] stack overflow safe kdump: safe smp_send_nmi_allbutself()
Re-implement smp_send_nmi_allbutself() so that calls to smp_processor_id (through send_IPI_allbutself) can be replaced with safe_smp_processor_id without affecting other parts of the kernel (as suggested by Eric Biederman). Signed-off-by: Fernando Vazquez <fernando@intellilink.co.jp> Looks-reasonable-to: Andi Kleen <ak@muc.de> Acked-by: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Vivek Goyal <vgoyal@in.ibm.com> Cc: James Bottomley <James.Bottomley@steeleye.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -134,7 +134,10 @@ static int crash_nmi_callback(struct notifier_block *self,
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static void smp_send_nmi_allbutself(void)
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{
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send_IPI_allbutself(NMI_VECTOR);
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cpumask_t mask = cpu_online_map;
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cpu_clear(safe_smp_processor_id(), mask);
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if (!cpus_empty(mask))
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send_IPI_mask(mask, NMI_VECTOR);
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}
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static struct notifier_block crash_nmi_nb = {
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