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(parent: d2532dd) | patch
Don't 'printk()' while holding xtime lock for writing
authorLinus Torvalds <torvalds@linux-foundation.org>
Mon, 24 Mar 2008 18:07:15 +0000 (11:07 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Mon, 24 Mar 2008 18:07:15 +0000 (11:07 -0700)
commit92896bd9fd75b1c993b92874d339a8088bb75560
tree2bd8bc5a8c8ee10a4b1fd62804281d2b486067f0tree | snapshot (tar.gz zip)
parentd2532dd20a126020de407c1c2476a75b53fce7accommit | diff
Don't 'printk()' while holding xtime lock for writing

The printk() can deadlock because it can wake up klogd(), and
task enqueueing will try to read the time in order to set a hrtimer.

Reported-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Debugged-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
kernel/time/timekeeping.c diff | blob | blame | history