When CONFIG_PROC_FS is not set, there is a build warning (turned
into an error):
../drivers/hwmon/dell-smm-hwmon.c: In function 'i8k_init_procfs':
../drivers/hwmon/dell-smm-hwmon.c:624:24: error: unused variable 'data' [-Werror=unused-variable]
struct dell_smm_data *data = dev_get_drvdata(dev);
Fix this by making I8K depend on PROC_FS and HWMON (instead of
selecting HWMON -- we prefer and try hard not to select entire
subsystems).
Build tested in all possible combinations of SENSORS_DELL_SMM,
I8K, and PROC_FS.
Fixes: 039ae58503f3 ("hwmon: Allow to compile dell-smm-hwmon driver without /proc/i8k")
Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: Pali Rohár <pali@xxxxxxxxxx>
Cc: Jean Delvare <jdelvare@xxxxxxxx>
Cc: Guenter Roeck <linux@xxxxxxxxxxxx>
Cc: linux-hwmon@xxxxxxxxxxxxxxx
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: x86@xxxxxxxxxx
Cc: Armin Wolf <W_Armin@xxxxxx>
---
arch/x86/Kconfig | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- linux-next-20210910.orig/arch/x86/Kconfig
+++ linux-next-20210910/arch/x86/Kconfig
@@ -1255,7 +1255,8 @@ config TOSHIBA
config I8K
tristate "Dell i8k legacy laptop support"
- select HWMON
+ depends on HWMON
+ depends on PROC_FS
select SENSORS_DELL_SMM
help
This option enables legacy /proc/i8k userspace interface in hwmon
