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Mon, 01 Sep 2025 09:12:12 -0700 (PDT) Received: from NB-6746.corp.yadro.com ([88.201.206.176]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-55f6771b237sm3028827e87.54.2025.09.01.09.12.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 01 Sep 2025 09:12:12 -0700 (PDT) From: Artem Shimko To: Sudeep Holla , Cristian Marussi Cc: Artem Shimko , arm-scmi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/2] firmware: arm_scmi: add missing spinlock documentation Date: Mon, 1 Sep 2025 19:12:04 +0300 Message-ID: <20250901161207.2501078-3-artyom.shimko@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250901161207.2501078-1-artyom.shimko@gmail.com> References: <20250901161207.2501078-1-artyom.shimko@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250901_091214_663588_425C6195 X-CRM114-Status: GOOD ( 11.10 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Adds a missing comment for xfer_lock spinlock in struct scmi_xfers_info. The spinlock protects access to the xfer buffers and transfer allocation mechanism, preventing race conditions in concurrent access scenarios. Signed-off-by: Artem Shimko --- drivers/firmware/arm_scmi/driver.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c index bd56a877fdfc..6828392152f4 100644 --- a/drivers/firmware/arm_scmi/driver.c +++ b/drivers/firmware/arm_scmi/driver.c @@ -76,6 +76,7 @@ static struct dentry *scmi_top_dentry; */ struct scmi_xfers_info { unsigned long *xfer_alloc_table; + /* Protects access to the xfer buffers */ spinlock_t xfer_lock; int max_msg; struct hlist_head free_xfers; -- 2.43.0