btrfs: optmize listxattr

The ->list handler is really not useful at all, because we always call
btrfs_xattr_generic_list anyway.  After this is done
find_btrfs_xattr_handler becomes unused, and it becomes obvious that the
temporary name buffer allocation isn't needed but we can directly copy
into the supplied buffer.

Tested with various getfattr -d calls on varying xattr lists.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 0 insertions, 2 deletions

diff --git a/fs/btrfs/acl.c b/fs/btrfs/acl.c
index b95147ef1c7..2f865311460 100644
--- a/fs/btrfs/acl.c
+++ b/fs/btrfs/acl.c
@@ -320,14 +320,12 @@ int btrfs_acl_chmod(struct inode *inode)
 
 struct xattr_handler btrfs_xattr_acl_default_handler = {
         .prefix = POSIX_ACL_XATTR_DEFAULT,
-        .list   = btrfs_xattr_generic_list,
         .get    = btrfs_xattr_acl_default_get,
         .set    = btrfs_xattr_acl_default_set,
 };
 
 struct xattr_handler btrfs_xattr_acl_access_handler = {
         .prefix = POSIX_ACL_XATTR_ACCESS,
-        .list   = btrfs_xattr_generic_list,
         .get    = btrfs_xattr_acl_access_get,
         .set    = btrfs_xattr_acl_access_set,
 };