lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Allow d_manage() to be used in RCU-walk mode

Browse Source 
Allow d_manage() to be called from pathwalk when it is in RCU-walk mode as well
as when it is in Ref-walk mode.  This permits __follow_mount_rcu() to call
d_manage() directly.  d_manage() needs a parameter to indicate that it is in
RCU-walk mode as it isn't allowed to sleep if in that mode (but should return
-ECHILD instead).

autofs4_d_manage() can then be set to retain RCU-walk mode if the daemon
accesses it and otherwise request dropping back to ref-walk mode.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
David Howells
2011-01-14 18:46:51 +00:00
committed by Al Viro
parent 87556ef199
commit ab90911ff9
5 changed files with 22 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/filesystems/Locking
View File

@@ -32,7 +32,7 @@ d_release: no no yes no
d_iput: no no yes no
d_dname: no no no no
d_automount: no no yes no
d_manage: no no yes no
d_manage: no no yes (ref-walk) maybe
--------------------------- inode_operations ---------------------------
prototypes: