On Fri, Jan 06, 2023 at 03:27:57PM +0100, Bartosz Golaszewski wrote: > IMO the complication of using an RW semaphore is insignificant and > maybe a comment next to its declaration in struct spidev would > suffice? The complication is using a semaphore at all, it's a pretty unusual locking construct and the whole up/down thing isn't clear to people who aren't familiar with it. Given that there's no clounting being used rwlock would be a much more obvious choice if the microseconds of extra concurrency is meaningful somehow.
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