linux-kernel - [PATCH v2 9/9] iio: adc: ad7173: Reduce device info struct size

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Message-Id: <20240514-ad4111-v2-9-29be6a55efb5@analog.com>
Date: Tue, 14 May 2024 10:22:54 +0300
From: Dumitru Ceclan via B4 Relay <devnull+dumitru.ceclan.analog.com@...nel.org>
To: Ceclan Dumitru <dumitru.ceclan@...log.com>
Cc: Lars-Peter Clausen <lars@...afoo.de>, 
 Michael Hennerich <Michael.Hennerich@...log.com>, 
 Jonathan Cameron <jic23@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
 Conor Dooley <conor+dt@...nel.org>, David Lechner <dlechner@...libre.com>, 
 linux-iio@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Dumitru Ceclan <mitrutzceclan@...il.com>
Subject: [PATCH v2 9/9] iio: adc: ad7173: Reduce device info struct size

From: Dumitru Ceclan <dumitru.ceclan@...log.com>

Reduce the size used by the device info struct by packing the bool
 fields within the same byte. This reduces the struct size from 52 bytes
 to 44 bytes.

Signed-off-by: Dumitru Ceclan <dumitru.ceclan@...log.com>
---
 drivers/iio/adc/ad7173.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/iio/adc/ad7173.c b/drivers/iio/adc/ad7173.c
index f049d79380ac..f963c731cae3 100644
--- a/drivers/iio/adc/ad7173.c
+++ b/drivers/iio/adc/ad7173.c
@@ -180,15 +180,15 @@ struct ad7173_device_info {
 	unsigned int clock;
 	unsigned int id;
 	char *name;
-	bool has_current_inputs;
-	bool has_vcom_input;
-	bool has_temp;
+	bool has_current_inputs		:1;
+	bool has_vcom_input		:1;
+	bool has_temp			:1;
 	/* ((AVDD1 − AVSS)/5) */
-	bool has_common_input;
-	bool has_input_buf;
-	bool has_int_ref;
-	bool has_ref2;
-	bool higher_gpio_bits;
+	bool has_common_input		:1;
+	bool has_input_buf		:1;
+	bool has_int_ref		:1;
+	bool has_ref2			:1;
+	bool higher_gpio_bits		:1;
 	u8 num_gpios;
 };
 

-- 
2.43.0