• Julia Cartwright's avatar
    gpio: zx: make use of raw_spinlock variants · 8c41ab4f
    Julia Cartwright authored
    The zx 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: default avatarJulia Cartwright <julia@ni.com>
    Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
gpio-zx.c 7.4 KB