Kill CL_PROPAGATION, sanitize fs/pnode.c:get_source()

First of all, get_source() never results in CL_PROPAGATION
alone.  We either get CL_MAKE_SHARED (for the continuation
of peer group) or CL_SLAVE (slave that is not shared) or both
(beginning of peer group among slaves).  Massage the code to
make that explicit, kill CL_PROPAGATION test in clone_mnt()
(nothing sets CL_MAKE_SHARED without CL_PROPAGATION and in
clone_mnt() we are checking CL_PROPAGATION after we'd found
that there's no CL_SLAVE, so the check for CL_MAKE_SHARED
would do just as well).

Fix comments, while we are at it...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 1 insertions, 2 deletions

diff --git a/fs/pnode.h b/fs/pnode.h
index 958665d662a..6c7ef3252a2 100644
--- a/fs/pnode.h
+++ b/fs/pnode.h
@@ -21,8 +21,7 @@
 #define CL_SLAVE                0x02
 #define CL_COPY_ALL             0x04
 #define CL_MAKE_SHARED          0x08
-#define CL_PROPAGATION          0x10
-#define CL_PRIVATE              0x20
+#define CL_PRIVATE              0x10
 
 static inline void set_mnt_shared(struct vfsmount *mnt)
 {