From: Andrew Halaney <ahalaney@xxxxxxxxxx> v5.4.143-rt64-rc1 stable review patch. If anyone has any objections, please let me know. ----------- [ Upstream commit b2ed0a4302faf2bb09e97529dd274233c082689b ] 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> Signed-off-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx> Signed-off-by: Tom Zanussi <zanussi@xxxxxxxxxx> --- 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 19ea20be3fd7..966946454ced 100644 --- a/kernel/locking/rwsem-rt.c +++ b/kernel/locking/rwsem-rt.c @@ -200,7 +200,6 @@ 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 -- 2.17.1
