Re: [v2,3/9] powerpc: mpc52xx_gpt: make use of raw_spinlock variants

Michael Ellerman
2018-01-29T04:13:45Z

On Tue, 2017-03-21 at 22:43:03 UTC, Julia Cartwright wrote:
> The mpc52xx_gpt code 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>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/77720c82915a8b7797e0041af95707

cheers