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ovl: using posix_acl_xattr_size() to get size instead of posix_acl_to_xattr()

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There is no functional change but it seems better to get size by calling
posix_acl_xattr_size() instead of calling posix_acl_to_xattr() with
NULL buffer argument. Additionally, remove unnecessary assignments.

Signed-off-by: Chengguang Xu <cgxu519@gmx.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
This commit is contained in:
Chengguang Xu 2018-06-22 09:49:36 +08:00 committed by Miklos Szeredi
parent 1e92e3072c
commit 14fa085640
1 changed files with 2 additions and 3 deletions
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5
fs/overlayfs/dir.c
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@ -414,13 +414,12 @@ static int ovl_set_upper_acl(struct dentry *upperdentry, const char *name,
if (!IS_ENABLED(CONFIG_FS_POSIX_ACL) || !acl)
return 0;
size = posix_acl_to_xattr(NULL, acl, NULL, 0);
size = posix_acl_xattr_size(acl->a_count);
buffer = kmalloc(size, GFP_KERNEL);
if (!buffer)
return -ENOMEM;
size = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
err = size;
err = posix_acl_to_xattr(&init_user_ns, acl, buffer, size);
if (err < 0)
goto out_free;