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Wed, 11 Jun 2025 15:43:02 -0700 (PDT) Received: from [127.0.1.1] ([2600:8803:e7e4:1d00:4753:719f:673f:547c]) by smtp.gmail.com with ESMTPSA id 5614622812f47-40a682fbf05sm24684b6e.32.2025.06.11.15.43.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 11 Jun 2025 15:43:02 -0700 (PDT) From: David Lechner Date: Wed, 11 Jun 2025 17:39:16 -0500 Subject: [PATCH 24/28] iio: pressure: mpl3115: use = { } instead of memset() MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20250611-iio-zero-init-stack-with-instead-of-memset-v1-24-ebb2d0a24302@baylibre.com> References: <20250611-iio-zero-init-stack-with-instead-of-memset-v1-0-ebb2d0a24302@baylibre.com> In-Reply-To: <20250611-iio-zero-init-stack-with-instead-of-memset-v1-0-ebb2d0a24302@baylibre.com> To: Michael Hennerich , Lars-Peter Clausen , Jonathan Cameron , =?utf-8?q?Nuno_S=C3=A1?= , Andy Shevchenko , Matthias Brugger , AngeloGioacchino Del Regno , Heiko Stuebner , Maxime Coquelin , Alexandre Torgue , Francesco Dolcini , =?utf-8?q?Jo=C3=A3o_Paulo_Gon=C3=A7alves?= , =?utf-8?q?Leonard_G=C3=B6hrs?= , kernel@pengutronix.de, Oleksij Rempel , Roan van Dijk , Tomasz Duszynski , Jacopo Mondi , Jean-Baptiste Maneyrol , Mudit Sharma , Javier Carrasco , =?utf-8?q?Ond=C5=99ej_Jirman?= , Andreas Klinger , Petre Rodan Cc: linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-stm32@st-md-mailman.stormreply.com, David Lechner X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1139; i=dlechner@baylibre.com; h=from:subject:message-id; bh=F7t+iKhqynKqsGA0Dj6cleYDfnxlvUihp6+d7Cd3LFc=; b=owEBbQGS/pANAwAKAcLMIAH/AY/AAcsmYgBoSgYkRI+gTkzxZcqPjcDI24PviRY3280AM10XW Soj9nQ54b+JATMEAAEKAB0WIQTsGNmeYg6D1pzYaJjCzCAB/wGPwAUCaEoGJAAKCRDCzCAB/wGP wJavB/49bwHnqdL6jGGKc0R+tNBC8oWNqAgzFcpqGTNVFp+z2yNK0M3aP1hqPHGL2QBr2TA2lr3 eaNmz5m1EZlIb1/czf8EL21m6pLnB/38XHfTEkuUfIR69m6fw3BS3Fc7dMyIcsr8vdRdjMxUgEx amFPpQ4mKamDXx1TLLaF0FtED8EH22FcU0HwsL98z1KR/0+4fZ6CTqvl2MRVikEAFvjbQdfenTc pegbUCdP51Apv3/KFpJJk3XTP46eI1vJ9vHFWabzWZyk42ooaanCWQC61vYb2d1I3+Qq7771tUx 7nB5lSZddiuam+AwBUXxlh+iq8FqViKV9rtz43g/ULV3QsZ0 X-Developer-Key: i=dlechner@baylibre.com; a=openpgp; fpr=8A73D82A6A1F509907F373881F8AF88C82F77C03 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250611_154303_651347_F7E0C72E X-CRM114-Status: GOOD ( 13.69 ) 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 Use { } instead of memset() to zero-initialize stack memory to simplify the code. Signed-off-by: David Lechner --- drivers/iio/pressure/mpl3115.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/iio/pressure/mpl3115.c b/drivers/iio/pressure/mpl3115.c index d6715997f13727e22346a76819cb7dc58a96614e..579da60ef441482a82f3bdf4f67436a13ab3e09d 100644 --- a/drivers/iio/pressure/mpl3115.c +++ b/drivers/iio/pressure/mpl3115.c @@ -160,7 +160,7 @@ static irqreturn_t mpl3115_trigger_handler(int irq, void *p) * of the buffer may be either 16 or 32-bits. As such we cannot * use a simple structure definition to express this data layout. */ - u8 buffer[16] __aligned(8); + u8 buffer[16] __aligned(8) = { }; int ret, pos = 0; mutex_lock(&data->lock); @@ -170,7 +170,6 @@ static irqreturn_t mpl3115_trigger_handler(int irq, void *p) goto done; } - memset(buffer, 0, sizeof(buffer)); if (test_bit(0, indio_dev->active_scan_mask)) { ret = i2c_smbus_read_i2c_block_data(data->client, MPL3115_OUT_PRESS, 3, &buffer[pos]); -- 2.43.0