thermal: make THERMAL_HWMON implementation fully internal

THERMAL_HWMON is implemented inside the thermal_sys driver and has no
effect on drivers implementing thermal zones, so they shouldn't see
anything related to it in <linux/thermal.h>.  Making the THERMAL_HWMON
implementation fully internal has two advantages beyond the cleaner
design:

* This avoids rebuilding all thermal drivers if the THERMAL_HWMON
  implementation changes, or if CONFIG_THERMAL_HWMON gets enabled or
  disabled.

* This avoids breaking the thermal kABI in these cases too, which should
  make distributions happy.

The only drawback I can see is slightly higher memory fragmentation, as
the number of kzalloc() calls will increase by one per thermal zone.  But
I doubt it will be a problem in practice, as I've never seen a system with
more than two thermal zones.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Rene Herman <rene.herman@gmail.com>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 0 insertions, 22 deletions

diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index d3ec89fb4122..47b4a27e6e97 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -85,22 +85,6 @@ struct thermal_cooling_device {
                                 ((long)t-2732+5)/10 : ((long)t-2732-5)/10)
 #define CELSIUS_TO_KELVIN(t)    ((t)*10+2732)
 
-#if defined(CONFIG_THERMAL_HWMON)
-/* thermal zone devices with the same type share one hwmon device */
-struct thermal_hwmon_device {
-        char type[THERMAL_NAME_LENGTH];
-        struct device *device;
-        int count;
-        struct list_head tz_list;
-        struct list_head node;
-};
-
-struct thermal_hwmon_attr {
-        struct device_attribute attr;
-        char name[16];
-};
-#endif
-
 struct thermal_zone_device {
         int id;
         char type[THERMAL_NAME_LENGTH];
@@ -120,12 +104,6 @@ struct thermal_zone_device {
         struct mutex lock;      /* protect cooling devices list */
         struct list_head node;
         struct delayed_work poll_queue;
-#if defined(CONFIG_THERMAL_HWMON)
-        struct list_head hwmon_node;
-        struct thermal_hwmon_device *hwmon;
-        struct thermal_hwmon_attr temp_input;   /* hwmon sys attr */
-        struct thermal_hwmon_attr temp_crit;    /* hwmon sys attr */
-#endif
 };
 /* Adding event notification support elements */
 #define THERMAL_GENL_FAMILY_NAME                "thermal_event"