diff options
| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2015-11-20 15:57:24 -0800 |
|---|---|---|
| committer | Luis Henriques <luis.henriques@canonical.com> | 2016-02-02 19:09:51 +0000 |
| commit | 0acd351f712514df5e1dbd0f3b71d33694a4f43c (patch) | |
| tree | 200d5aa74e03ca71f964aad2406aa3f9253ba48f /kernel/panic.c | |
| parent | c7afd462eae6d9541369e6a2370aec6dc62672ca (diff) | |
kernel/panic.c: turn off locks debug before releasing console lock
commit 7625b3a0007decf2b135cb47ca67abc78a7b1bc1 upstream.
Commit 08d78658f393 ("panic: release stale console lock to always get the
logbuf printed out") introduced an unwanted bad unlock balance report when
panic() is called directly and not from OOPS (e.g. from out_of_memory()).
The difference is that in case of OOPS we disable locks debug in
oops_enter() and on direct panic call nobody does that.
Fixes: 08d78658f393 ("panic: release stale console lock to always get the logbuf printed out")
Reported-by: kernel test robot <ying.huang@linux.intel.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Baoquan He <bhe@redhat.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Xie XiuQi <xiexiuqi@huawei.com>
Cc: Seth Jennings <sjenning@redhat.com>
Cc: "K. Y. Srinivasan" <kys@microsoft.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Petr Mladek <pmladek@suse.cz>
Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
Diffstat (limited to 'kernel/panic.c')
| -rw-r--r-- | kernel/panic.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/kernel/panic.c b/kernel/panic.c index df1d13ee481c..b3c877653d9c 100644 --- a/kernel/panic.c +++ b/kernel/panic.c @@ -150,8 +150,11 @@ void panic(const char *fmt, ...) * We may have ended up stopping the CPU holding the lock (in * smp_send_stop()) while still having some valuable data in the console * buffer. Try to acquire the lock then release it regardless of the - * result. The release will also print the buffers out. + * result. The release will also print the buffers out. Locks debug + * should be disabled to avoid reporting bad unlock balance when + * panic() is not being callled from OOPS. */ + debug_locks_off(); console_trylock(); console_unlock(); |