AFS: AFS fixups

Make some miscellaneous changes to the AFS filesystem:

 (1) Assert RCU barriers on module exit to make sure RCU has finished with
     callbacks in this module.

 (2) Correctly handle the AFS server returning a zero-length read.

 (3) Split out data zapping calls into one function (afs_zap_data).

 (4) Rename some afs_file_*() functions to afs_*() where they apply to
     non-regular files too.

 (5) Be consistent about the presentation of volume ID:vnode ID in debugging
     output.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/afs/main.c b/fs/afs/main.c
index 80ec6fd19a73..f1f71ff7d5c6 100644
--- a/fs/afs/main.c
+++ b/fs/afs/main.c
@@ -149,6 +149,7 @@ error_cache:
         afs_vlocation_purge();
         afs_cell_purge();
         afs_proc_cleanup();
+        rcu_barrier();
         printk(KERN_ERR "kAFS: failed to register: %d\n", ret);
         return ret;
 }
@@ -176,6 +177,7 @@ static void __exit afs_exit(void)
         cachefs_unregister_netfs(&afs_cache_netfs);
 #endif
         afs_proc_cleanup();
+        rcu_barrier();
 }
 
 module_exit(afs_exit);