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Commit 1130c55c authored by Greg Kroah-Hartman's avatar Greg Kroah-Hartman
Browse files

driver core: create write-only attribute macros for devices and drivers 



This creates the macros DRIVER_ATTR_WO() and DEVICE_ATTR_WO() for
write-only attributes for drivers and devices.

Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent a65fcce7

include/linux/device.h

+4 −0
Original line number Diff line number Diff line
@@ -277,6 +277,8 @@ struct driver_attribute { 
	struct driver_attribute driver_attr_##_name = __ATTR_RW(_name)

#define DRIVER_ATTR_RO(_name) \

	struct driver_attribute driver_attr_##_name = __ATTR_RO(_name)

#define DRIVER_ATTR_WO(_name) \

	struct driver_attribute driver_attr_##_name = __ATTR_WO(_name)



extern int __must_check driver_create_file(struct device_driver *driver,

					const struct driver_attribute *attr);
@@ -534,6 +536,8 @@ ssize_t device_store_bool(struct device *dev, struct device_attribute *attr, 
	struct device_attribute dev_attr_##_name = __ATTR_RW(_name)

#define DEVICE_ATTR_RO(_name) \

	struct device_attribute dev_attr_##_name = __ATTR_RO(_name)

#define DEVICE_ATTR_WO(_name) \

	struct device_attribute dev_attr_##_name = __ATTR_WO(_name)

#define DEVICE_ULONG_ATTR(_name, _mode, _var) \

	struct dev_ext_attribute dev_attr_##_name = \

		{ __ATTR(_name, _mode, device_show_ulong, device_store_ulong), &(_var) }