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| author | Anna-Maria Gleixner <anna-maria@linutronix.de> | 2018-06-12 18:16:20 +0200 |
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| committer | Thomas Gleixner <tglx@linutronix.de> | 2018-06-12 23:33:24 +0200 |
| commit | ccfbb5bed407053b27492a9adc06064d949a9aa6 (patch) | |
| tree | 1d12a1c6ba9e081d8af26dee5e60f8ed89bcdff2 /lib/refcount.c | |
| parent | f2ae67941138a1e53cb1bc6a1b5878a8bdc74d26 (diff) | |
| download | linux-ccfbb5bed407053b27492a9adc06064d949a9aa6.tar.gz | |
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 <anna-maria@linutronix.de> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r20180612161621.22645-3-bigeasy@linutronix.de
Diffstat (limited to 'lib/refcount.c')
0 files changed, 0 insertions, 0 deletions