linux-kernel - [PATCH] Make panic_on

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Message-ID: <20120411121529.GH26688@redacted.bos.redhat.com>
Date:	Wed, 11 Apr 2012 08:15:29 -0400
From:	Kyle McMartin <kmcmarti@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	x86@...nel.org
Subject: [PATCH] Make panic_on_oops configurable

Several distros set this by default by patching panic_on_oops. It seems
to fit with the BOOTPARAM_{HARD,SOFT}_PANIC options though, so let's add
a Kconfig entry and reduce some more upstream delta.

Signed-off-by: Kyle McMartin <kyle@...hat.com>

--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -27,7 +27,7 @@
 #define PANIC_TIMER_STEP 100
 #define PANIC_BLINK_SPD 18
 
-int panic_on_oops;
+int panic_on_oops = CONFIG_PANIC_ON_OOPS_VALUE;
 static unsigned long tainted_mask;
 static int pause_on_oops;
 static int pause_on_oops_flag;
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 6777153..91858cd 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -228,6 +228,26 @@ config BOOTPARAM_SOFTLOCKUP_PANIC_VALUE
 	default 0 if !BOOTPARAM_SOFTLOCKUP_PANIC
 	default 1 if BOOTPARAM_SOFTLOCKUP_PANIC
 
+config PANIC_ON_OOPS
+	bool "Panic on Oops" if EXPERT
+	default n
+	help
+	  Say Y here to enable the kernel to panic when it oopses. This
+	  has the same effect as setting oops=panic on the kernel command
+	  line.
+
+	  This feature is useful to ensure that the kernel does not do
+	  anything erroneous after an oops which could result in data
+	  corruption or other issues.
+
+	  Say N if unsure.
+
+config PANIC_ON_OOPS_VALUE
+	int
+	range 0 1
+	default 0 if !PANIC_ON_OOPS
+	default 1 if PANIC_ON_OOPS
+
 config DETECT_HUNG_TASK
 	bool "Detect Hung Tasks"
 	depends on DEBUG_KERNEL
--
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