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authorAndrew Morton <akpm@osdl.org>2006-12-07 02:14:01 +0100
committerAndi Kleen <andi@basil.nowhere.org>2006-12-07 02:14:01 +0100
commitbb81a09e55eaf7e5f798468ab971469b6f66a259 (patch)
treecf1ed6b0ad75137361228955535044fd4630a57b /include/linux/nmi.h
parente5e3a0428968dcc1f9318ce1c941a918e99f8b84 (diff)
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[PATCH] x86: all cpu backtrace
When a spinlock lockup occurs, arrange for the NMI code to emit an all-cpu backtrace, so we get to see which CPU is holding the lock, and where. Cc: Andi Kleen <ak@muc.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Andi Kleen <ak@suse.de>
Diffstat (limited to 'include/linux/nmi.h')
-rw-r--r--include/linux/nmi.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/nmi.h b/include/linux/nmi.h
index e16904e..acb4ed1 100644
--- a/include/linux/nmi.h
+++ b/include/linux/nmi.h
@@ -15,9 +15,14 @@
* disables interrupts for a long time. This call is stateless.
*/
#ifdef ARCH_HAS_NMI_WATCHDOG
+#include <asm/nmi.h>
extern void touch_nmi_watchdog(void);
#else
# define touch_nmi_watchdog() touch_softlockup_watchdog()
#endif
+#ifndef trigger_all_cpu_backtrace
+#define trigger_all_cpu_backtrace() do { } while (0)
+#endif
+
#endif
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