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[68.184.200.203]) by smtp.gmail.com with ESMTPSA id l7-20020a37f507000000b0047b528ef416sm340999qkk.93.2022.02.24.13.23.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 24 Feb 2022 13:23:41 -0800 (PST) From: Andrew Halaney To: corbet@lwn.net Cc: peterz@infradead.org, mingo@redhat.com, will@kernel.org, longman@redhat.com, boqun.feng@gmail.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Andrew Halaney , Leah Leshchinsky Subject: [PATCH] Documentation/locking/locktypes: Fix PREEMPT_RT _bh() description Date: Thu, 24 Feb 2022 15:23:12 -0600 Message-Id: <20220224212312.2601153-1-ahalaney@redhat.com> X-Mailer: git-send-email 2.35.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-2.8 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H5,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_NONE, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 Signed-off-by: Andrew Halaney --- 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