superrob1500
/
mirror-linux
mirror of https://github.com/torvalds/linux
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

sysfs: simplify attribute definition macros 

Define the macros in terms of each other.
This makes them easier to understand and also will make it easier to
implement the transition machinery for 'const struct attribute'.

__ATTR_RO_MODE() can't be implemented in terms of __ATTR() as not all
attributes have a .store callback. The same issue theoretically exists
for __ATTR_WO(), but practically that does not occur today.

Reorder __ATTR_RO() below __ATTR_RO_MODE() to keep the order of the
macro definition consistent with respect to each other.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://patch.msgid.link/20251029-sysfs-const-attr-prep-v5-7-ea7d745acff4@weissschuh.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/1354/merge
Thomas Weißschuh 2025-10-29 09:12:16 +01:00 committed by Greg Kroah-Hartman
parent 2d76fdc1c9
commit 71464949b1
1 changed files with 7 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
include/linux/sysfs.h
View File

@ -251,28 +251,20 @@ struct attribute_group {
.store = _store, \
}
#define __ATTR_RO(_name) { \
.attr = { .name = __stringify(_name), .mode = 0444 }, \
.show = _name##_show, \
}
#define __ATTR_RO_MODE(_name, _mode) { \
.attr = { .name = __stringify(_name), \
.mode = VERIFY_OCTAL_PERMISSIONS(_mode) }, \
.show = _name##_show, \
}
#define __ATTR_RW_MODE(_name, _mode) { \
.attr = { .name = __stringify(_name), \
.mode = VERIFY_OCTAL_PERMISSIONS(_mode) }, \
.show = _name##_show, \
.store = _name##_store, \
}
#define __ATTR_RO(_name) \
__ATTR_RO_MODE(_name, 0444)
#define __ATTR_WO(_name) { \
.attr = { .name = __stringify(_name), .mode = 0200 }, \
.store = _name##_store, \
}
#define __ATTR_RW_MODE(_name, _mode) \
__ATTR(_name, _mode, _name##_show, _name##_store)
#define __ATTR_WO(_name) \
__ATTR(_name, 0200, NULL, _name##_store)
#define __ATTR_RW(_name) __ATTR(_name, 0644, _name##_show, _name##_store)