[PATCH] fw_cfg: use __ATTR_RO_MODE to define rev sysfs

[Wei Yang]

Leverage __ATTR_RO_MODE to define rev sysfs instead of using open code
to define the attribute.

Signed-off-by: Wei Yang <richardw.yang@xxxxxxxxxxxxxxx>
---
 drivers/firmware/qemu_fw_cfg.c | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/drivers/firmware/qemu_fw_cfg.c b/drivers/firmware/qemu_fw_cfg.c
index 039e0f91dba8..a1293cbd7adb 100644
--- a/drivers/firmware/qemu_fw_cfg.c
+++ b/drivers/firmware/qemu_fw_cfg.c
@@ -296,18 +296,13 @@ static int fw_cfg_do_platform_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static ssize_t fw_cfg_showrev(struct kobject *k, struct attribute *a, char *buf)
+static ssize_t fw_cfg_rev_show(struct kobject *k, struct kobj_attribute *a,
+			       char *buf)
 {
 	return sprintf(buf, "%u\n", fw_cfg_rev);
 }
-
-static const struct {
-	struct attribute attr;
-	ssize_t (*show)(struct kobject *k, struct attribute *a, char *buf);
-} fw_cfg_rev_attr = {
-	.attr = { .name = "rev", .mode = S_IRUSR },
-	.show = fw_cfg_showrev,
-};
+static const struct kobj_attribute fw_cfg_rev_attr =
+	__ATTR_RO_MODE(fw_cfg_rev, 0400);
 
 /* fw_cfg_sysfs_entry type */
 struct fw_cfg_sysfs_entry {
-- 
2.19.1