sysfs: create __ATTR_WO()

This creates the macro __ATTR_WO() for write-only attributes, instead of
having to "open define" them.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index b5a9d9b26bd4..69c1ff003628 100644
--- a/include/linux/sysfs.h
+++ b/include/linux/sysfs.h
@@ -80,6 +80,11 @@ struct attribute_group {
         .show   = _name##_show,                                         \
 }
 
+#define __ATTR_WO(_name) {                                              \
+        .attr   = { .name = __stringify(_name), .mode = S_IWUSR },      \
+        .store  = _name##_store,                                        \
+}
+
 #define __ATTR_RW(_name) __ATTR(_name, (S_IWUSR | S_IRUGO),             \
                          _name##_show, _name##_store)