linux-kernel - [PATCH] mfd: rsmu: split core code into separate module

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Date: Wed, 29 May 2024 11:48:47 +0200
From: Arnd Bergmann <arnd@...nel.org>
To: Lee Jones <lee@...nel.org>,
	Min Li <min.li.xe@...esas.com>
Cc: Arnd Bergmann <arnd@...db.de>,
	Charles Keepax <ckeepax@...nsource.cirrus.com>,
	Okan Sahin <okan.sahin@...log.com>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] mfd: rsmu: split core code into separate module

From: Arnd Bergmann <arnd@...db.de>

Linking a file into two modules can have unintended side-effects
and produces a W=1 warning:

scripts/Makefile.build:236: drivers/mfd/Makefile: rsmu_core.o is added to multiple modules: rsmu-i2c rsmu-spi

Make this one a separate module instead.

Fixes: a1867f85e06e ("mfd: Add Renesas Synchronization Management Unit (SMU) support")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/mfd/Makefile    | 6 ++----
 drivers/mfd/rsmu_core.c | 2 ++
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index c66f07edcd0e..db1ba39de3b5 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -280,7 +280,5 @@ obj-$(CONFIG_MFD_INTEL_M10_BMC_PMCI)   += intel-m10-bmc-pmci.o
 obj-$(CONFIG_MFD_ATC260X)	+= atc260x-core.o
 obj-$(CONFIG_MFD_ATC260X_I2C)	+= atc260x-i2c.o
 
-rsmu-i2c-objs			:= rsmu_core.o rsmu_i2c.o
-rsmu-spi-objs			:= rsmu_core.o rsmu_spi.o
-obj-$(CONFIG_MFD_RSMU_I2C)	+= rsmu-i2c.o
-obj-$(CONFIG_MFD_RSMU_SPI)	+= rsmu-spi.o
+obj-$(CONFIG_MFD_RSMU_I2C)	+= rsmu_i2c.o rsmu_core.o
+obj-$(CONFIG_MFD_RSMU_SPI)	+= rsmu_spi.o rsmu_core.o
diff --git a/drivers/mfd/rsmu_core.c b/drivers/mfd/rsmu_core.c
index 29437fd0bd5b..fd04a6e5dfa3 100644
--- a/drivers/mfd/rsmu_core.c
+++ b/drivers/mfd/rsmu_core.c
@@ -78,11 +78,13 @@ int rsmu_core_init(struct rsmu_ddata *rsmu)
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(rsmu_core_init);
 
 void rsmu_core_exit(struct rsmu_ddata *rsmu)
 {
 	mutex_destroy(&rsmu->lock);
 }
+EXPORT_SYMBOL_GPL(rsmu_core_exit);
 
 MODULE_DESCRIPTION("Renesas SMU core driver");
 MODULE_LICENSE("GPL");
-- 
2.39.2