On 2018-12-01 09:42:38 [+0100], Arnd Bergmann wrote: > You are right that you can't take (or release) a mutex from interrupt > context. However, I don't think converting a spinlock to a semaphore > is going to help here either. you can acquire a semaphore with a try_lock from interrupts context but you can't do that with a mutex. You can also a acquire a semaphore in one context and release in another. Not that I'm a fan of those things but those two are often the reasons why people stick with a semaphore. I haven't looked a general picture yet, will try to do so later today or tomorrow. > Arnd Sebastian
