more vfs stuff

Rafael's fix + RCU freeing of posix_acl. Please, pull from
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6.git/ for-linus

Shortlog:
Al Viro (2):
get rid of boilerplate switches in posix_acl.h
RCUify freeing acls, let check_acl() go ahead in RCU mode if acl is cached

Rafael J. Wysocki (1):

      fix block device fallout from ->fsync() changes

Diffstat:

 fs/block_dev.c            |    4 ++
 fs/namei.c                |   17 ++++-------
 include/linux/posix_acl.h |   74 ++++++++++++++++-----------------------------
 3 files changed, 36 insertions(+), 59 deletions(-)