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[93.34.91.161]) by smtp.googlemail.com with ESMTPSA id ffacd0b85a97d-37ee0b9bcfdsm4295329f8f.103.2024.10.21.06.02.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 21 Oct 2024 06:02:39 -0700 (PDT) From: Christian Marangi To: Christian Marangi , Andrew Lunn , Florian Fainelli , Vladimir Oltean , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Heiner Kallweit , Russell King , Matthias Brugger , AngeloGioacchino Del Regno , linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [net-next RFC PATCH 1/4] net: mdio: implement mdio_mutex_nested guard() variant Date: Mon, 21 Oct 2024 15:01:56 +0200 Message-ID: <20241021130209.15660-2-ansuelsmth@gmail.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20241021130209.15660-1-ansuelsmth@gmail.com> References: <20241021130209.15660-1-ansuelsmth@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241021_060242_495678_56A30325 X-CRM114-Status: GOOD ( 12.55 ) 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 Implement mdio_mutex_nested guard() variant. guard() comes from the cleanup.h API that defines handy class to handle the lifecycle of a critical section. Several drivers use of the mutex_lock_nested()/mutex_unlock() function call pair hence it is sensible to provide a variant of the generic guard(mutex), guard(mdio_mutex_nested) so that drivers can be better supported with the call variant "mutex_lock_nested(..., MDIO_MUTEX_NESTED)" Example usage: guard(mutex_lock_nested)(&bus->mdio_lock) scoped_guard(mutex_lock_nested, &bus->mdio_lock) { ... } Signed-off-by: Christian Marangi --- include/linux/mdio.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/include/linux/mdio.h b/include/linux/mdio.h index efeca5bd7600..3f0691dee46a 100644 --- a/include/linux/mdio.h +++ b/include/linux/mdio.h @@ -8,6 +8,7 @@ #include #include +#include #include struct gpio_desc; @@ -25,6 +26,9 @@ enum mdio_mutex_lock_class { MDIO_MUTEX_NESTED, }; +DEFINE_GUARD(mdio_mutex_nested, struct mutex *, + mutex_lock_nested(_T, MDIO_MUTEX_NESTED), mutex_unlock(_T)) + struct mdio_device { struct device dev;