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sysfs: add BIN_ATTR_WO() macro

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This variant was missing from sysfs.h, I guess no one noticed it before.

Turns out the powerpc secure variable code can use it, so add it to the
tree for it, and potentially others to take advantage of, instead of
open-coding it.

Reported-by: Nayna Jain <nayna@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20190826150153.GD18418@kroah.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2019-08-26 17:01:53 +02:00
parent d9430f96c0
commit 7f905761e1
1 changed files with 9 additions and 0 deletions
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9
include/linux/sysfs.h
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@ -196,6 +196,12 @@ struct bin_attribute {
.size = _size, \
}
#define __BIN_ATTR_WO(_name) { \
.attr = { .name = __stringify(_name), .mode = 0200 }, \
.store = _name##_store, \
.size = _size, \
}
#define __BIN_ATTR_RW(_name, _size) \
__BIN_ATTR(_name, 0644, _name##_read, _name##_write, _size)
@ -208,6 +214,9 @@ struct bin_attribute bin_attr_##_name = __BIN_ATTR(_name, _mode, _read, \
#define BIN_ATTR_RO(_name, _size) \
struct bin_attribute bin_attr_##_name = __BIN_ATTR_RO(_name, _size)
#define BIN_ATTR_WO(_name, _size) \
struct bin_attribute bin_attr_##_name = __BIN_ATTR_WO(_name, _size)
#define BIN_ATTR_RW(_name, _size) \
struct bin_attribute bin_attr_##_name = __BIN_ATTR_RW(_name, _size)