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| author | John Stultz <john.stultz@linaro.org> | 2014-03-27 16:30:49 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-03-28 08:07:07 +0100 |
| commit | cab5e127eef040399902caa8e1510795583fa03a (patch) | |
| tree | 9e9a5713d4d58ffafea24354537e8207bd013c7e | |
| parent | 75c5a52da3fc2a06abb6c6192bdf5d680e56d37d (diff) | |
| download | linux-cab5e127eef040399902caa8e1510795583fa03a.tar.bz2 | |
time: Revert to calling clock_was_set_delayed() while in irq context
In commit 47a1b796306356f35 ("tick/timekeeping: Call
update_wall_time outside the jiffies lock"), we moved to calling
clock_was_set() due to the fact that we were no longer holding
the timekeeping or jiffies lock.
However, there is still the problem that clock_was_set()
triggers an IPI, which cannot be done from the timer's hard irq
context, and will generate WARN_ON warnings.
Apparently in my earlier testing, I'm guessing I didn't bump the
dmesg log level, so I somehow missed the WARN_ONs.
Thus we need to revert back to calling clock_was_set_delayed().
Signed-off-by: John Stultz <john.stultz@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1395963049-11923-1-git-send-email-john.stultz@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
| -rw-r--r-- | kernel/time/timekeeping.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index 0aa4ce81bc16..5b40279ecd71 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -1435,7 +1435,8 @@ void update_wall_time(void) out: raw_spin_unlock_irqrestore(&timekeeper_lock, flags); if (clock_set) - clock_was_set(); + /* Have to call _delayed version, since in irq context*/ + clock_was_set_delayed(); } /** |