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Thu, 11 Jun 2026 19:51:30 -0700 (PDT) Received: from m2max ([198.8.77.157]) by smtp.gmail.com with ESMTPSA id 46e09a7af769-7e781734190sm862128a34.19.2026.06.11.19.51.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 11 Jun 2026 19:51:29 -0700 (PDT) From: Jens Axboe To: io-uring@vger.kernel.org Cc: dvyukov@google.com, csander@purestorage.com, krisman@suse.de, Jens Axboe Subject: [PATCH 1/6] io_uring: grab RCU read lock marking task run Date: Thu, 11 Jun 2026 20:48:27 -0600 Message-ID: <20260612025125.1690253-2-axboe@kernel.dk> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260612025125.1690253-1-axboe@kernel.dk> References: <20260612025125.1690253-1-axboe@kernel.dk> Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Not required right now, as io_req_local_work_add() already calls this helper with the RCU read lock held. But in preparation for that not being the case, grab it locally. Signed-off-by: Jens Axboe --- io_uring/tw.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/io_uring/tw.c b/io_uring/tw.c index 023d5e6bc491..f4335c8d50d9 100644 --- a/io_uring/tw.c +++ b/io_uring/tw.c @@ -158,11 +158,11 @@ void tctx_task_work(struct callback_head *cb) */ static void io_ctx_mark_taskrun(struct io_ring_ctx *ctx) { - lockdep_assert_in_rcu_read_lock(); - if (ctx->flags & IORING_SETUP_TASKRUN_FLAG) { - struct io_rings *rings = rcu_dereference(ctx->rings_rcu); + struct io_rings *rings; + guard(rcu)(); + rings = rcu_dereference(ctx->rings_rcu); atomic_or(IORING_SQ_TASKRUN, &rings->sq_flags); } } -- 2.53.0