[PATCH 18/19] pinctrl: sirf: atlas7: make use of raw_spinlock variants
Linus Walleij
linus.walleij at linaro.org
Wed Mar 15 03:13:27 PDT 2017
On Thu, Mar 9, 2017 at 5:22 PM, Julia Cartwright <julia at ni.com> wrote:
> The sirf atlas7 pinctrl drivers currently implement 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 at ni.com>
Patch applied.
Yours,
Linus Walleij
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