lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

sysdev: Add utility functions for simple int/ulong variable sysdev attributes

Browse Source 
This adds a new sysdev_ext_attribute that stores a pointer to the variable
it manages and some utility functions/macro to easily use them.

Previously all users wrote custom macros to generate show/store
functions for each variable, with this it is possible to avoid
that in many cases.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Andi Kleen
2008-07-01 18:48:42 +02:00
committed by Greg Kroah-Hartman
parent 4a0b2b4dbe
commit 9800794ac1
2 changed files with 83 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

34
include/linux/sysdev.h
View File

@ -119,4 +119,38 @@ struct sysdev_attribute {
extern int sysdev_create_file(struct sys_device *, struct sysdev_attribute *);
extern void sysdev_remove_file(struct sys_device *, struct sysdev_attribute *);
struct sysdev_ext_attribute {
struct sysdev_attribute attr;
void *var;
};
/*
* Support for simple variable sysdev attributes.
* The pointer to the variable is stored in a sysdev_ext_attribute
*/
/* Add more types as needed */
extern ssize_t sysdev_show_ulong(struct sys_device *, struct sysdev_attribute *,
char *);
extern ssize_t sysdev_store_ulong(struct sys_device *,
struct sysdev_attribute *, const char *, size_t);
extern ssize_t sysdev_show_int(struct sys_device *, struct sysdev_attribute *,
char *);
extern ssize_t sysdev_store_int(struct sys_device *,
struct sysdev_attribute *, const char *, size_t);
#define _SYSDEV_ULONG_ATTR(_name, _mode, _var) \
{ _SYSDEV_ATTR(_name, _mode, sysdev_show_ulong, sysdev_store_ulong), \
&(_var) }
#define SYSDEV_ULONG_ATTR(_name, _mode, _var) \
struct sysdev_ext_attribute attr_##_name = \
_SYSDEV_ULONG_ATTR(_name, _mode, _var);
#define _SYSDEV_INT_ATTR(_name, _mode, _var) \
{ _SYSDEV_ATTR(_name, _mode, sysdev_show_int, sysdev_store_int), \
&(_var) }
#define SYSDEV_INT_ATTR(_name, _mode, _var) \
struct sysdev_ext_attribute attr_##_name = \
_SYSDEV_INT_ATTR(_name, _mode, _var);
#endif /* _SYSDEV_H_ */