From: Aaron Tomlin <atomlin@xxxxxxxxxx>
Some times it is preferred not to use the
trigger_all_cpu_backtrace() routine when one wants
to avoid capturing a back trace for current.
For instance if one was previously captured
recently.
This patch provides a new routine namely
trigger_allbutself_cpu_backtrace() which offers
the flexibility to issue an NMI to every cpu but
current and capture a back trace accordingly.
[Added stub in #else clause - dcz]
Signed-off-by: Aaron Tomlin <atomlin@xxxxxxxxxx>
Signed-off-by: Don Zickus <dzickus@xxxxxxxxxx>
---
include/linux/nmi.h | 11 ++++++++++-
1 files changed, 10 insertions(+), 1 deletions(-)
diff --git a/include/linux/nmi.h b/include/linux/nmi.h
index 6a45fb5..a17ab63 100644
--- a/include/linux/nmi.h
+++ b/include/linux/nmi.h
@@ -32,15 +32,24 @@ static inline void touch_nmi_watchdog(void)
#ifdef arch_trigger_all_cpu_backtrace
static inline bool trigger_all_cpu_backtrace(void)
{
- arch_trigger_all_cpu_backtrace();
+ arch_trigger_all_cpu_backtrace(true);
return true;
}
+static inline bool trigger_allbutself_cpu_backtrace(void)
+{
+ arch_trigger_all_cpu_backtrace(false);
+ return true;
+}
#else
static inline bool trigger_all_cpu_backtrace(void)
{
return false;
}
+static inline bool trigger_allbutself_cpu_backtrace(void)
+{
+ return false;
+}
#endif
#ifdef CONFIG_LOCKUP_DETECTOR
--
1.7.1
--
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