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| author | Guenter Roeck <linux@roeck-us.net> | 2016-08-12 06:28:15 -0700 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2016-09-08 21:34:16 -0700 |
| commit | 86430c1a66fe490fc97b0970575c223e27dee49d (patch) | |
| tree | 3a9cfc330173a7114a5a9b5896a4d3e33f115164 /drivers/hwmon | |
| parent | aa18cc911ae2f172429d59169e95726b8e63525c (diff) | |
| download | lwn-86430c1a66fe490fc97b0970575c223e27dee49d.tar.gz lwn-86430c1a66fe490fc97b0970575c223e27dee49d.zip | |
hwmon: (core) Avoid cyclic dependency between hwmon and thermal_sys
If both hwmon and thermal_sys are built as modules, and
CONFIG_THERMAL_HWMON is enabled, the following cyclic module dependency
is reported.
depmod: ERROR: Found 2 modules in dependency cycles!
depmod: ERROR: Cycle detected: hwmon -> thermal_sys -> hwmon
Fixes: e4bce763adb2 ("hwmon: (core) New hwmon registration API")
Reported-by: Vignesh R <vigneshr@ti.com>
Cc: Keerthy J <j-keerthy@ti.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon')
| -rw-r--r-- | drivers/hwmon/hwmon.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/hwmon/hwmon.c b/drivers/hwmon/hwmon.c index fade170977e8..adae6848ffb2 100644 --- a/drivers/hwmon/hwmon.c +++ b/drivers/hwmon/hwmon.c @@ -108,7 +108,13 @@ static DEFINE_IDA(hwmon_ida); /* Thermal zone handling */ -#if IS_REACHABLE(CONFIG_THERMAL) && defined(CONFIG_THERMAL_OF) +/* + * The complex conditional is necessary to avoid a cyclic dependency + * between hwmon and thermal_sys modules. + */ +#if IS_REACHABLE(CONFIG_THERMAL) && defined(CONFIG_THERMAL_OF) && \ + (!defined(CONFIG_THERMAL_HWMON) || \ + !(defined(MODULE) && IS_MODULE(CONFIG_THERMAL))) static int hwmon_thermal_get_temp(void *data, int *temp) { struct hwmon_thermal_data *tdata = data; @@ -153,7 +159,7 @@ static int hwmon_thermal_add_sensor(struct device *dev, { return 0; } -#endif /* IS_REACHABLE(CONFIG_THERMAL) && defined(CONFIG_THERMAL_OF) */ +#endif /* IS_REACHABLE(CONFIG_THERMAL) && ... */ /* sysfs attribute management */ |