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author | Julia Cartwright <julia@ni.com> | 2017-03-09 17:21:56 +0100 |
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committer | Linus Walleij <linus.walleij@linaro.org> | 2017-03-16 21:52:09 +0100 |
commit | 99b9b45de8808994ea9a176241e52bb6fab71cdd (patch) | |
tree | d2c4510f7c993aa6c59bb366860f3bcb67ed37e1 /drivers/gpio/gpio-ws16c48.c | |
parent | gpio: etraxfs: make use of raw_spinlock variants (diff) | |
download | linux-99b9b45de8808994ea9a176241e52bb6fab71cdd.tar.xz linux-99b9b45de8808994ea9a176241e52bb6fab71cdd.zip |
gpio: pl061: make use of raw_spinlock variants
The pl061 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>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio/gpio-ws16c48.c')
0 files changed, 0 insertions, 0 deletions