There's no chance of sleeping here, the reader is giving up the lock and possibly waking up the writer who is waiting on it. Reported-by: Chunyu Hu <chuhu@xxxxxxxxxx> Signed-off-by: Andrew Halaney <ahalaney@xxxxxxxxxx> --- Hello, I ran into a warning caused by this, and I think the warning is incorrect. Please let me know if I'm wrong! I'm working off of linux-5.12.y-rt, but this applies cleanly to older stable branches as well. Thanks, Andrew kernel/locking/rwsem-rt.c | 1 - 1 file changed, 1 deletion(-) diff --git a/kernel/locking/rwsem-rt.c b/kernel/locking/rwsem-rt.c index 274172d5bb3a..b61edc4dcb73 100644 --- a/kernel/locking/rwsem-rt.c +++ b/kernel/locking/rwsem-rt.c @@ -198,7 +198,6 @@ void __up_read(struct rw_semaphore *sem) if (!atomic_dec_and_test(&sem->readers)) return; - might_sleep(); raw_spin_lock_irq(&m->wait_lock); /* * Wake the writer, i.e. the rtmutex owner. It might release the -- 2.30.2
