linux-kernel - [PATCH] Documentation/locking/locktypes: Fix PREEMPT_RT

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Date:   Thu, 24 Feb 2022 15:23:12 -0600
From:   Andrew Halaney <ahalaney@...hat.com>
To:     corbet@....net
Cc:     peterz@...radead.org, mingo@...hat.com, will@...nel.org,
        longman@...hat.com, boqun.feng@...il.com,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        Andrew Halaney <ahalaney@...hat.com>,
        Leah Leshchinsky <lleshchi@...hat.com>
Subject: [PATCH] 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@...hat.com>
Signed-off-by: Andrew Halaney <ahalaney@...hat.com>
---
 Documentation/locking/locktypes.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/locking/locktypes.rst b/Documentation/locking/locktypes.rst
index 4fd7b70fcde1..bfa75ea1b66a 100644
--- a/Documentation/locking/locktypes.rst
+++ b/Documentation/locking/locktypes.rst
@@ -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:
-- 
2.35.1