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| author | Anna-Maria Gleixner <anna-maria@linutronix.de> | 2018-06-12 18:16:21 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2018-06-12 23:33:25 +0200 |
| commit | 7ea959c45769612aa92557fb6464679f5fec7d9e (patch) | |
| tree | 59727b6ac6c32a2addb41cab2c875ab7caee1b75 /lib/xz/xz_dec_test.c | |
| parent | ccfbb5bed407053b27492a9adc06064d949a9aa6 (diff) | |
| download | linux-7ea959c45769612aa92557fb6464679f5fec7d9e.tar.gz linux-7ea959c45769612aa92557fb6464679f5fec7d9e.tar.bz2 linux-7ea959c45769612aa92557fb6464679f5fec7d9e.zip | |
locking/refcounts: Implement refcount_dec_and_lock_irqsave()
There are in-tree users of refcount_dec_and_lock() which must acquire the
spin lock with interrupts disabled. To workaround the lack of an irqsave
variant of refcount_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/r20180612161621.22645-4-bigeasy@linutronix.de
[bigeasy: s@atomic_dec_and_lock@refcount_dec_and_lock@g]
Diffstat (limited to 'lib/xz/xz_dec_test.c')
0 files changed, 0 insertions, 0 deletions