gfs2: using posix_acl_xattr_size instead of posix_acl_to_xattr

It seems better to get size by calling posix_acl_xattr_size() instead of
calling posix_acl_to_xattr() with NULL buffer argument.

posix_acl_xattr_size() never returns 0, so remove the unnecessary check.

Signed-off-by: Chengguang Xu <cgxu519@gmx.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

1 files changed, 2 insertions, 4 deletions

diff --git a/fs/gfs2/acl.c b/fs/gfs2/acl.c
index 776717f1eeea..af5f87a493d9 100644
--- a/fs/gfs2/acl.c
+++ b/fs/gfs2/acl.c
@@ -82,14 +82,12 @@ struct posix_acl *gfs2_get_acl(struct inode *inode, int type)
 int __gfs2_set_acl(struct inode *inode, struct posix_acl *acl, int type)
 {
         int error;
-        int len;
+        size_t len;
         char *data;
         const char *name = gfs2_acl_name(type);
 
         if (acl) {
-                len = posix_acl_to_xattr(&init_user_ns, acl, NULL, 0);
-                if (len == 0)
-                        return 0;
+                len = posix_acl_xattr_size(acl->a_count);
                 data = kmalloc(len, GFP_NOFS);
                 if (data == NULL)
                         return -ENOMEM;