linux-kernel - [PATCH -next v5 10/23] iio: imu: smi330: #undef field

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Message-ID: <97549838f28a1bb7861cfb42ee687f832942b13a.1761588465.git.geert+renesas@glider.be>
Date: Mon, 27 Oct 2025 19:41:44 +0100
From: Geert Uytterhoeven <geert+renesas@...der.be>
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Cc: linux-clk@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-renesas-soc@...r.kernel.org,
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	linux-kernel@...r.kernel.org,
	Geert Uytterhoeven <geert+renesas@...der.be>
Subject: [PATCH -next v5 10/23] iio: imu: smi330: #undef field_{get,prep}() before definition

Prepare for the advent of globally available common field_get() and
field_prep() macros by undefining the symbols before defining local
variants.  This prevents redefinition warnings from the C preprocessor
when introducing the common macros later.

Suggested-by: Yury Norov <yury.norov@...il.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
--
v5:
  - New.
---
 drivers/iio/imu/smi330/smi330_core.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/iio/imu/smi330/smi330_core.c b/drivers/iio/imu/smi330/smi330_core.c
index d9178725ade3da83..a79964fe68fadf47 100644
--- a/drivers/iio/imu/smi330/smi330_core.c
+++ b/drivers/iio/imu/smi330/smi330_core.c
@@ -68,7 +68,9 @@
 #define SMI330_SOFT_RESET_DELAY 2000
 
 /* Non-constant mask variant of FIELD_GET() and FIELD_PREP() */
+#undef field_get
 #define field_get(_mask, _reg) (((_reg) & (_mask)) >> (ffs(_mask) - 1))
+#undef field_prep
 #define field_prep(_mask, _val) (((_val) << (ffs(_mask) - 1)) & (_mask))
 
 #define SMI330_ACCEL_CHANNEL(_axis) {					\
-- 
2.43.0