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authorFernando Vazquez <fernando@intellilink.co.jp>2006-10-01 02:29:10 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-01 03:39:31 -0400
commitbc03613decef0cc4d2f3a24f19fa5a868745715f (patch)
tree7c3343b100ae399df29815d709e4ab01768141ca /arch/i386
parentce53af9496c625a8ae33526713be34a23756db19 (diff)
[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>
Diffstat (limited to 'arch/i386')
-rw-r--r--arch/i386/kernel/crash.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/i386/kernel/crash.c b/arch/i386/kernel/crash.c
index 2dfc049dafa3..144b43288965 100644
--- a/arch/i386/kernel/crash.c
+++ b/arch/i386/kernel/crash.c
@@ -134,7 +134,10 @@ static int crash_nmi_callback(struct notifier_block *self,
134 134
135static void smp_send_nmi_allbutself(void) 135static void smp_send_nmi_allbutself(void)
136{ 136{
137 send_IPI_allbutself(NMI_VECTOR); 137 cpumask_t mask = cpu_online_map;
138 cpu_clear(safe_smp_processor_id(), mask);
139 if (!cpus_empty(mask))
140 send_IPI_mask(mask, NMI_VECTOR);
138} 141}
139 142
140static struct notifier_block crash_nmi_nb = { 143static struct notifier_block crash_nmi_nb = {