Clang warns: drivers/hwmon/smpro-hwmon.c:378:2: error: unannotated fall-through between switch labels [-Werror,-Wimplicit-fallthrough] default: ^ drivers/hwmon/smpro-hwmon.c:378:2: note: insert 'break;' to avoid fall-through default: ^ break; 1 error generated. Clang is a little more pedantic than GCC, which does not warn when falling through to a case that is just break or return. Clang's version is more in line with the kernel's own stance in deprecated.rst, which states that all switch/case blocks must end in either break, fallthrough, continue, goto, or return. Add the missing break to silence the warning. Fixes: a87456864cbb ("hwmon: Add Ampere's Altra smpro-hwmon driver") Link: https://github.com/ClangBuiltLinux/linux/issues/1751 Signed-off-by: Nathan Chancellor <nathan@xxxxxxxxxx> --- drivers/hwmon/smpro-hwmon.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/hwmon/smpro-hwmon.c b/drivers/hwmon/smpro-hwmon.c index ee54e21c2c12..667e88b6bae5 100644 --- a/drivers/hwmon/smpro-hwmon.c +++ b/drivers/hwmon/smpro-hwmon.c @@ -375,6 +375,7 @@ static umode_t smpro_is_visible(const void *data, enum hwmon_sensor_types type, return 0; break; } + break; default: break; } base-commit: 0ffb687b6508c36a17b99bdaf014b38532404182 -- 2.38.1