[PATCH v4 3/3] iio: adc: ltc2497: reorder struct members to fix memory holes
From: Yusuf Alper Bilgin <hidden>
Date: 2025-08-15 10:02:10
Also in:
linux-iio, lkml
Subsystem:
analog devices inc iio drivers, iio subsystem and drivers, the rest · Maintainers:
Nuno Sá, Michael Hennerich, Jonathan Cameron, Linus Torvalds
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 <redacted> --- 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 dfe2d5c30017adeb3f17e57fc5bf1e0e792ff30f..48e9f74870ab489b5df6e69a39446610c6a72b93 100644
--- a/drivers/iio/adc/ltc2497.h
+++ b/drivers/iio/adc/ltc2497.h@@ -5,8 +5,8 @@ #define LTC2497_CONVERSION_TIME_MS 150ULL 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.
@@ -20,15 +20,15 @@ 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; + struct regulator *ref; + ktime_t time_prev; const struct ltc2497_chip_info *chip_info; - u8 addr_prev; int (*result_and_measure)(struct ltc2497core_driverdata *ddata, u8 address, int *val); enum iio_chan_type chan_type_prev; + u8 addr_prev; }; int ltc2497core_probe(struct device *dev, struct iio_dev *indio_dev);
--
2.43.0