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| author | Nathan Lynch <ntl@pobox.com> | 2012-11-05 06:20:31 -0800 |
|---|---|---|
| committer | Bryan Wu <roc@roc-samos.(none)> | 2012-11-11 12:09:43 -0800 |
| commit | 0b8728d6f140dc20690384286ade47c956edc999 (patch) | |
| tree | 52a1c8a4e0b3b39396f2967e8478acf9464ca0c5 /scripts/kconfig/expr.h | |
| parent | 77b67063bb6bce6d475e910d3b886a606d0d91f7 (diff) | |
| download | linux-0b8728d6f140dc20690384286ade47c956edc999.tar.bz2 | |
ledtrig-cpu: kill useless mutex to fix sleep in atomic context
Seeing the following every time the CPU enters or leaves idle on a
Beagleboard:
BUG: sleeping function called from invalid context at kernel/mutex.c:269
in_atomic(): 1, irqs_disabled(): 0, pid: 0, name: swapper/0
no locks held by swapper/0/0.
[<c001659c>] (unwind_backtrace+0x0/0xf8) from [<c05aaa7c>] (mutex_lock_nested+0x24/0x380)
[<c05aaa7c>] (mutex_lock_nested+0x24/0x380) from [<c043bd1c>] (ledtrig_cpu+0x38/0x88)
[<c043bd1c>] (ledtrig_cpu+0x38/0x88) from [<c000f4b0>] (cpu_idle+0xf4/0x120)
[<c000f4b0>] (cpu_idle+0xf4/0x120) from [<c07e47c8>] (start_kernel+0x2bc/0x30c)
Miles Lane has reported seeing similar splats during system suspend.
The mutex in struct led_trigger_cpu appears to have no function: it
resides in a per-cpu data structure which never changes after the
trigger is registered. So just remove it.
Reported-by: Miles Lane <miles.lane@gmail.com>
Signed-off-by: Nathan Lynch <ntl@pobox.com>
Signed-off-by: Bryan Wu <roc@roc-samos.(none)>
Diffstat (limited to 'scripts/kconfig/expr.h')
0 files changed, 0 insertions, 0 deletions