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authorBen Hutchings <ben@decadent.org.uk>2011-01-02 23:02:42 +0000
committerIngo Molnar <mingo@elte.hu>2011-01-03 05:25:52 +0100
commit551423748a4eba55f2eb0fc250d757986471f187 (patch)
tree401f03f7e5a70de089ef83153ac98096929c6f09 /kernel/watchdog.c
parentb518a64983cbf2ff31aed530898de2d80e4573d5 (diff)
downloadlinux-linaro-stable-551423748a4eba55f2eb0fc250d757986471f187.tar.gz
watchdog: Improve initialisation error message and documentation
The error message 'NMI watchdog failed to create perf event...' does not make it clear that this is a fatal error for the watchdog. It also currently prints the error value as a pointer, rather than extracting the error code with PTR_ERR(). Fix that. Add a note to the description of the 'nowatchdog' kernel parameter to associate it with this message. Reported-by: Cesare Leonardi <celeonar@gmail.com> Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Cc: 599368@bugs.debian.org Cc: 608138@bugs.debian.org Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: <stable@kernel.org> # .37.x and later LKML-Reference: <1294009362.3167.126.camel@localhost> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/watchdog.c')
-rw-r--r--kernel/watchdog.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index 6e3c41a4024c..5b082156cd21 100644
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -364,7 +364,8 @@ static int watchdog_nmi_enable(int cpu)
goto out_save;
}
- printk(KERN_ERR "NMI watchdog failed to create perf event on cpu%i: %p\n", cpu, event);
+ printk(KERN_ERR "NMI watchdog disabled for cpu%i: unable to create perf event: %ld\n",
+ cpu, PTR_ERR(event));
return PTR_ERR(event);
/* success path */