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 <redacted>

Applied to powerpc next, thanks.

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

cheers