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| author | Andi Kleen <andi@firstfloor.org> | 2010-01-05 12:48:08 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-03-07 17:04:48 -0800 |
| commit | 869dfc875e32fd832385fd52ce54525a10401ed6 (patch) | |
| tree | 39885759145d7f7c5137fd5e5259181c064ba34c /include | |
| parent | 28812fe11a21826ba4c97c6c7971a619987cd912 (diff) | |
| download | linux-3.10-869dfc875e32fd832385fd52ce54525a10401ed6.tar.gz linux-3.10-869dfc875e32fd832385fd52ce54525a10401ed6.tar.bz2 linux-3.10-869dfc875e32fd832385fd52ce54525a10401ed6.zip | |
driver core: Add class_attr_string for simple read-only string
Several drivers just export a static string as class attributes.
Use the new extensible attribute support to define a simple
CLASS_ATTR_STRING() macro for this.
This will allow to remove code from drivers in followon patches.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/device.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/linux/device.h b/include/linux/device.h index 190f8d30d1d..f95d5bfe824 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -265,6 +265,23 @@ extern int __must_check class_create_file(struct class *class, extern void class_remove_file(struct class *class, const struct class_attribute *attr); +/* Simple class attribute that is just a static string */ + +struct class_attribute_string { + struct class_attribute attr; + char *str; +}; + +/* Currently read-only only */ +#define _CLASS_ATTR_STRING(_name, _mode, _str) \ + { __ATTR(_name, _mode, show_class_attr_string, NULL), _str } +#define CLASS_ATTR_STRING(_name, _mode, _str) \ + struct class_attribute_string class_attr_##_name = \ + _CLASS_ATTR_STRING(_name, _mode, _str) + +extern ssize_t show_class_attr_string(struct class *class, struct class_attribute *attr, + char *buf); + struct class_interface { struct list_head node; struct class *class; |