[PATCHES] fs_context stuff

[Al Viro <viro@zeniv.linux.org.uk>]

	That stuff had been discussed last cycle, didn't make it into
-next back then.  If nobody objects, I'm throwing that branch into
#for-next.

	vfs_parse_fs_string() calling conventions are inconvenient;
it takes string and length, and just about every caller (with only two
exceptions) passes string, strlen(string).

	Proposal: introduce vfs_parse_fs_qstr() for those that want
the generic form (and pass &QSTR_LEN(string, length) as its argument)
and lose the length argument of vfs_parse_fs_string().

	Callers are happier that way.  The first commit in the series does
the calling convention change and converts existing users; the second one
converts a couple of open-coded vfs_parse_fs_string() in do_nfs4_mount()
to that primitive.  A lot more readable that way, IMO...

	Branch (-rc1-based) lives in
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git #work.fs_context
Individual patches in followups.

	Please, review.  If there's no objections, into -next it goes...

Shortlog:
Al Viro (2):
      change the calling conventions for vfs_parse_fs_string()
      do_nfs4_mount(): switch to vfs_parse_fs_string()

Diffstat:
 Documentation/filesystems/mount_api.rst | 10 +++++++-
 Documentation/filesystems/porting.rst   | 10 ++++++++
 drivers/gpu/drm/i915/gem/i915_gemfs.c   |  9 ++-----
 drivers/gpu/drm/v3d/v3d_gemfs.c         |  9 ++-----
 fs/afs/mntpt.c                          |  3 ++-
 fs/fs_context.c                         | 17 ++++++-------
 fs/namespace.c                          |  8 +++---
 fs/nfs/fs_context.c                     |  3 +--
 fs/nfs/namespace.c                      |  3 ++-
 fs/nfs/nfs4super.c                      | 44 +++++++++------------------------
 fs/smb/client/fs_context.c              |  4 +--
 include/linux/fs_context.h              |  9 +++++--
 kernel/trace/trace.c                    |  3 +--
 13 files changed, 58 insertions(+), 74 deletions(-)