lockref cleanups

[Christoph Hellwig]

Hi all,

this series has a bunch of cosmetic cleanups for the lockref code I came up
with when reading the code in preparation of adding a new user of it.

Diffstat:
 fs/dcache.c             |    3 --
 fs/erofs/zdata.c        |    3 --
 fs/gfs2/quota.c         |    3 --
 include/linux/lockref.h |   26 ++++++++++++++------
 lib/lockref.c           |   60 ++++++++++++------------------------------------
 5 files changed, 36 insertions(+), 59 deletions(-)