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Thu, 14 Aug 2025 04:00:33 -0700 (PDT) Received: from [127.0.1.1] ([185.177.137.147]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-af91dfd4b31sm2542980066b.85.2025.08.14.04.00.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 14 Aug 2025 04:00:32 -0700 (PDT) From: Yusuf Alper Bilgin Date: Thu, 14 Aug 2025 13:00:20 +0200 Subject: [PATCH v3 4/4] iio: adc: ltc2497: reorder struct members to fix memory holes Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250814-ltc2495-v3-4-c2a6cecd6b99@gmail.com> References: <20250814-ltc2495-v3-0-c2a6cecd6b99@gmail.com> In-Reply-To: <20250814-ltc2495-v3-0-c2a6cecd6b99@gmail.com> To: Lars-Peter Clausen , Michael Hennerich , Jonathan Cameron , David Lechner , =?utf-8?q?Nuno_S=C3=A1?= , Andy Shevchenko , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Liam Beguin Cc: Michael Hennerich , linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Yusuf Alper Bilgin X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1755169221; l=1743; i=y.alperbilgin@gmail.com; s=20250811; h=from:subject:message-id; bh=ha3TYWbV+huAwQsCRTUDSrSg0nq7+oWMtWJZ76ApaJI=; b=AAUFkHhsavrGE02LDakST86q8xbNc5p47qQxtm45rVCCHo0N+t1JNejhdY+/4DuJPXDJbui/D OW2xs1Rczi/BgFqc/a2zKjM//RR2j8u2LNCKtz9VkkydLJO3bfEwWY3 X-Developer-Key: i=y.alperbilgin@gmail.com; a=ed25519; pk=FtW2oyQ0+xlYU0XmhYiJYC3lNPtPrgeE6i4WXPwaFnY= Reorder members in the `ltc2497_chip_info` and `ltc2497core_driverdata` structs to eliminate memory holes identified by the `pahole` tool. Confirm via the `bloat-o-meter` that this change has no significant impact on the final code size: | Object File | Total Size Change | |-----------------|-------------------| | ltc2497-core.o | 0 (0.00%) | | ltc2497.o | +2 (+0.10%) | | ltc2496.o | 0 (0.00%) | Signed-off-by: Yusuf Alper Bilgin --- drivers/iio/adc/ltc2497.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/iio/adc/ltc2497.h b/drivers/iio/adc/ltc2497.h index 65f406bc61c24b912de4beed604a074b3ea9df91..578f55efc5c400980fe8bbd2b22= 0aafb222d6f33 100644 --- a/drivers/iio/adc/ltc2497.h +++ b/drivers/iio/adc/ltc2497.h @@ -10,8 +10,8 @@ #define LTC2497_ENABLE_TEMPERATURE_CONV (LTC2497_EN2 | LTC2497_IM) =20 struct ltc2497_chip_info { - u32 resolution; const char *name; + u32 resolution; /* * Represents the datasheet constant from the temperature formula: * T_Kelvin =3D (DATAOUT * Vref) / temp_scale, where Vref is in Volts. @@ -27,12 +27,12 @@ struct ltc2497_chip_info { struct ltc2497core_driverdata { struct regulator *ref; ktime_t time_prev; - /* lock to protect against multiple access to the device */ - struct mutex lock; const struct ltc2497_chip_info *chip_info; - u8 addr_prev; int (*result_and_measure)(struct ltc2497core_driverdata *ddata, u8 address, int *val); + /* lock to protect against multiple access to the device */ + struct mutex lock; + u8 addr_prev; }; =20 int ltc2497core_probe(struct device *dev, struct iio_dev *indio_dev); --=20 2.43.0