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hwmon: Support guard() and scoped_guard for subsystem locks

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Add support for guard() and scoped_guard() for the hwmon subsystem lock
to simplify its use.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck
2026-05-13 07:14:33 -07:00
parent 563d71205f
commit d1e720c732
2 changed files with 7 additions and 3 deletions
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7
Documentation/hwmon/hwmon-kernel-api.rst
View File

@@ -85,9 +85,10 @@ removal.
When using ``[devm_]hwmon_device_register_with_info()`` to register the When using ``[devm_]hwmon_device_register_with_info()`` to register the
hardware monitoring device, accesses using the associated access functions hardware monitoring device, accesses using the associated access functions
are serialised by the hardware monitoring core. If a driver needs locking are serialised by the hardware monitoring core. If a driver needs locking
for other functions such as interrupt handlers or for attributes which are for other functions such as interrupt handlers, attributes which are fully
fully implemented in the driver, hwmon_lock() and hwmon_unlock() can be used implemented in the driver, or debugfs functions, hwmon_lock() and hwmon_unlock()
to ensure that calls to those functions are serialized. can be used to ensure that calls to those functions are serialized. Those
functions also support guard() and scoped_guard() variants.
Using devm_hwmon_device_register_with_info() Using devm_hwmon_device_register_with_info()
-------------------------------------------- --------------------------------------------

3
include/linux/hwmon.h
View File

@@ -13,6 +13,7 @@
#define _HWMON_H_ #define _HWMON_H_
#include <linux/bitops.h> #include <linux/bitops.h>
#include <linux/cleanup.h>
struct device; struct device;
struct attribute_group; struct attribute_group;
@@ -495,6 +496,8 @@ char *devm_hwmon_sanitize_name(struct device *dev, const char *name);
void hwmon_lock(struct device *dev); void hwmon_lock(struct device *dev);
void hwmon_unlock(struct device *dev); void hwmon_unlock(struct device *dev);
DEFINE_GUARD(hwmon_lock, struct device *, hwmon_lock(_T), hwmon_unlock(_T))
/** /**
* hwmon_is_bad_char - Is the char invalid in a hwmon name * hwmon_is_bad_char - Is the char invalid in a hwmon name
* @ch: the char to be considered * @ch: the char to be considered