btrfs: use BTRFS_ATTR instead of btrfs_no_store()

we have BTRFS_ATTR define to create sysfs RO file, use that.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Chris Mason <clm@fb.com>

diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
index 82a968fdfd8059a0c819fc0625915bd5f8f6a727..e6a851b9ae348d2bf15c6ae0a2aedc14ac5dd939 100644 (file)
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -403,13 +403,6 @@ static ssize_t btrfs_label_store(struct kobject *kobj,
 }
 BTRFS_ATTR_RW(label, 0644, btrfs_label_show, btrfs_label_store);
 
-static ssize_t btrfs_no_store(struct kobject *kobj,
-                                struct kobj_attribute *a,
-                                const char *buf, size_t len)
-{
-       return -EPERM;
-}
-
 static ssize_t btrfs_nodesize_show(struct kobject *kobj,
                                struct kobj_attribute *a, char *buf)
 {
@@ -418,7 +411,7 @@ static ssize_t btrfs_nodesize_show(struct kobject *kobj,
        return snprintf(buf, PAGE_SIZE, "%u\n", fs_info->super_copy->nodesize);
 }
 
-BTRFS_ATTR_RW(nodesize, 0444, btrfs_nodesize_show, btrfs_no_store);
+BTRFS_ATTR(nodesize, 0444, btrfs_nodesize_show);
 
 static ssize_t btrfs_sectorsize_show(struct kobject *kobj,
                                struct kobj_attribute *a, char *buf)
@@ -428,7 +421,7 @@ static ssize_t btrfs_sectorsize_show(struct kobject *kobj,
        return snprintf(buf, PAGE_SIZE, "%u\n", fs_info->super_copy->sectorsize);
 }
 
-BTRFS_ATTR_RW(sectorsize, 0444, btrfs_sectorsize_show, btrfs_no_store);
+BTRFS_ATTR(sectorsize, 0444, btrfs_sectorsize_show);
 
 static ssize_t btrfs_clone_alignment_show(struct kobject *kobj,
                                struct kobj_attribute *a, char *buf)
@@ -438,7 +431,7 @@ static ssize_t btrfs_clone_alignment_show(struct kobject *kobj,
        return snprintf(buf, PAGE_SIZE, "%u\n", fs_info->super_copy->sectorsize);
 }
 
-BTRFS_ATTR_RW(clone_alignment, 0444, btrfs_clone_alignment_show, btrfs_no_store);
+BTRFS_ATTR(clone_alignment, 0444, btrfs_clone_alignment_show);
 
 static struct attribute *btrfs_attrs[] = {
        BTRFS_ATTR_PTR(label),