Linux IIO development
 help / color / mirror / Atom feed
From: Yusuf Alper Bilgin <y.alperbilgin@gmail.com>
To: "Lars-Peter Clausen" <lars@metafoo.de>,
	"Michael Hennerich" <Michael.Hennerich@analog.com>,
	"Jonathan Cameron" <jic23@kernel.org>,
	"David Lechner" <dlechner@baylibre.com>,
	"Nuno Sá" <nuno.sa@analog.com>,
	"Andy Shevchenko" <andy@kernel.org>,
	"Rob Herring" <robh@kernel.org>,
	"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
	"Conor Dooley" <conor+dt@kernel.org>,
	"Liam Beguin" <liambeguin@gmail.com>
Cc: Michael Hennerich <michael.hennerich@analog.com>,
	 linux-iio@vger.kernel.org, devicetree@vger.kernel.org,
	 linux-kernel@vger.kernel.org,
	Yusuf Alper Bilgin <y.alperbilgin@gmail.com>
Subject: [PATCH v3 4/4] iio: adc: ltc2497: reorder struct members to fix memory holes
Date: Thu, 14 Aug 2025 13:00:20 +0200	[thread overview]
Message-ID: <20250814-ltc2495-v3-4-c2a6cecd6b99@gmail.com> (raw)
In-Reply-To: <20250814-ltc2495-v3-0-c2a6cecd6b99@gmail.com>

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 <y.alperbilgin@gmail.com>
---
 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..578f55efc5c400980fe8bbd2b220aafb222d6f33 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)
 
 struct ltc2497_chip_info {
-	u32 resolution;
 	const char *name;
+	u32 resolution;
 	/*
 	 * Represents the datasheet constant from the temperature formula:
 	 * T_Kelvin = (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;
 };
 
 int ltc2497core_probe(struct device *dev, struct iio_dev *indio_dev);

-- 
2.43.0


      parent reply	other threads:[~2025-08-14 11:00 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-08-14 11:00 [PATCH v3 0/4] Add LTC2495 support Yusuf Alper Bilgin
2025-08-14 11:00 ` [PATCH v3 1/4] dt-bindings: iio: adc: ltc2497: add lltc,ltc2495 bindings Yusuf Alper Bilgin
2025-08-15  8:57   ` Krzysztof Kozlowski
2025-08-16 10:23     ` Jonathan Cameron
2025-08-14 11:00 ` [PATCH v3 2/4] iio: adc: ltc2497: add support for LTC2495 Yusuf Alper Bilgin
2025-08-14 11:00 ` [PATCH v3 3/4] iio: adc: ltc2497: add temperature sensor support Yusuf Alper Bilgin
2025-08-14 19:19   ` David Lechner
2025-08-15  8:56   ` Krzysztof Kozlowski
2025-08-14 11:00 ` Yusuf Alper Bilgin [this message]

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20250814-ltc2495-v3-4-c2a6cecd6b99@gmail.com \
    --to=y.alperbilgin@gmail.com \
    --cc=Michael.Hennerich@analog.com \
    --cc=andy@kernel.org \
    --cc=conor+dt@kernel.org \
    --cc=devicetree@vger.kernel.org \
    --cc=dlechner@baylibre.com \
    --cc=jic23@kernel.org \
    --cc=krzk+dt@kernel.org \
    --cc=lars@metafoo.de \
    --cc=liambeguin@gmail.com \
    --cc=linux-iio@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=nuno.sa@analog.com \
    --cc=robh@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox