diff options
| author | Anna-Maria Gleixner <[email protected]> | 2018-06-12 16:16:20 +0000 |
|---|---|---|
| committer | Thomas Gleixner <[email protected]> | 2018-06-12 21:33:24 +0000 |
| commit | ccfbb5bed407053b27492a9adc06064d949a9aa6 (patch) | |
| tree | 1d12a1c6ba9e081d8af26dee5e60f8ed89bcdff2 /tools/perf/scripts/python/syscall-counts-by-pid.py | |
| parent | alpha: Remove custom dec_and_lock() implementation (diff) | |
| download | kernel-ccfbb5bed407053b27492a9adc06064d949a9aa6.tar.gz kernel-ccfbb5bed407053b27492a9adc06064d949a9aa6.zip | |
atomic: Add irqsave variant of atomic_dec_and_lock()
There are in-tree users of atomic_dec_and_lock() which must acquire the
spin lock with interrupts disabled. To workaround the lack of an irqsave
variant of atomic_dec_and_lock() they use local_irq_save() at the call
site. This causes extra code and creates in some places unneeded long
interrupt disabled times. These places need also extra treatment for
PREEMPT_RT due to the disconnect of the irq disabling and the lock
function.
Implement the missing irqsave variant of the function.
Signed-off-by: Anna-Maria Gleixner <[email protected]>
Signed-off-by: Sebastian Andrzej Siewior <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Acked-by: Peter Zijlstra (Intel) <[email protected]>
Link: https://lkml.kernel.org/[email protected]
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts-by-pid.py')
0 files changed, 0 insertions, 0 deletions