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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>
This commit is contained in:
Andrew Halaney 2022-02-24 15:23:12 -06:00 committed by Jonathan Corbet
parent 247097e2bb
commit 0d2be10b30
1 changed files with 1 additions and 1 deletions
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Documentation/locking/locktypes.rst
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@ -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: