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authorLinus Torvalds <torvalds@linux-foundation.org>2009-09-11 13:15:55 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-11 13:15:55 -0700
commit989aa44a5f215427085ccfe65c1e378e3399c9eb (patch)
treecd1993f2187e17e0e8d46d4fe12848e7be21fe96 /include/linux
parent4004f02d7af9bb1f5fd993fba60ed5bd0f5397a9 (diff)
parent47cab6a722d44c71c4f8224017ef548522243cf4 (diff)
Merge branch 'core-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'core-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: debug lockups: Improve lockup detection, fix generic arch fallback debug lockups: Improve lockup detection
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/nmi.h19
1 files changed, 17 insertions, 2 deletions
diff --git a/include/linux/nmi.h b/include/linux/nmi.h
index 29af2d5df09..b752e807add 100644
--- a/include/linux/nmi.h
+++ b/include/linux/nmi.h
@@ -28,8 +28,23 @@ static inline void acpi_nmi_disable(void) { }
static inline void acpi_nmi_enable(void) { }
#endif
-#ifndef trigger_all_cpu_backtrace
-#define trigger_all_cpu_backtrace() do { } while (0)
+/*
+ * Create trigger_all_cpu_backtrace() out of the arch-provided
+ * base function. Return whether such support was available,
+ * to allow calling code to fall back to some other mechanism:
+ */
+#ifdef arch_trigger_all_cpu_backtrace
+static inline bool trigger_all_cpu_backtrace(void)
+{
+ arch_trigger_all_cpu_backtrace();
+
+ return true;
+}
+#else
+static inline bool trigger_all_cpu_backtrace(void)
+{
+ return false;
+}
#endif
#endif