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| author |   Julia Cartwright <julia@ni.com> | 2017-03-21 17:43:08 -0500 |
|---|---|---|
| committer |   Linus Walleij <linus.walleij@linaro.org> | 2017-03-28 11:12:36 +0200 |
| commit | 3906e8089af3225a0a22c12cc3cf10be4630976e (patch) | |
| tree | 136ef6a007e0f1e1ee99c14829036780b1ba0b4c /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | gpio: gpio-reg: add irq mapping for gpio-reg users (diff) | |
| download | linux-dev-3906e8089af3225a0a22c12cc3cf10be4630976e.tar.xz linux-dev-3906e8089af3225a0a22c12cc3cf10be4630976e.zip | |
gpio: 104-idio-16: make use of raw_spinlock variants
The 104-idio-16 gpio driver currently implements an irq_chip for handling
interrupts; due to how irq_chip handling is done, it's necessary for the
irq_chip methods to be invoked from hardirq context, even on a a
real-time kernel. Because the spinlock_t type becomes a "sleeping"
spinlock w/ RT kernels, it is not suitable to be used with irq_chips.
A quick audit of the operations under the lock reveal that they do only
minimal, bounded work, and are therefore safe to do under a raw spinlock.
Signed-off-by: Julia Cartwright <julia@ni.com>
Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions