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authorJulia Cartwright <julia@ni.com>2017-03-09 17:21:56 +0100
committerLinus Walleij <linus.walleij@linaro.org>2017-03-16 21:52:09 +0100
commit99b9b45de8808994ea9a176241e52bb6fab71cdd (patch)
treed2c4510f7c993aa6c59bb366860f3bcb67ed37e1 /drivers/gpio/gpio-ws16c48.c
parentgpio: etraxfs: make use of raw_spinlock variants (diff)
downloadlinux-99b9b45de8808994ea9a176241e52bb6fab71cdd.tar.xz
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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')
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