Commit 0d2be10b authored Feb 24, 2022 by Andrew Halaney Committed by Jonathan Corbet Mar 04, 2022

Documentation/locking/locktypes: Fix PREEMPT_RT _bh() description



With PREEMPT_RT the _bh() version of a spinlock leaves preemption
enabled, align the doc to say that instead of the opposite.

Reported-by: Leah Leshchinsky <lleshchi@redhat.com>
Signed-off-by: Andrew Halaney <ahalaney@redhat.com>
Reviewed-by: Boqun Feng <boqun.feng@gmail.com>
Link: https://lore.kernel.org/r/20220224212312.2601153-1-ahalaney@redhat.com


Signed-off-by: Jonathan Corbet <corbet@lwn.net>

parent 247097e2

Documentation/locking/locktypes.rst

+1 −1

Original line number	Diff line number	Diff line
		@@ -247,7 +247,7 @@ based on rt_mutex which changes the semantics:
		Non-PREEMPT_RT kernels disable preemption to get this effect.

		PREEMPT_RT kernels use a per-CPU lock for serialization which keeps
		preemption disabled. The lock disables softirq handlers and also
		preemption enabled. The lock disables softirq handlers and also
		prevents reentrancy due to task preemption.

		PREEMPT_RT kernels preserve all other spinlock_t semantics: