tree 1d84e440f92f3483ee1320cc5e22d9678cc3dd9c
parent 0835a1903dd39d86e213fab079469e2dd6c207a7
author David Howells <dhowells@redhat.com> 1429179564 +0100
committer David Howells <dhowells@redhat.com> 1429195241 +0100

Overlayfs: Wrap RCU-mode accesses to ->d_inode on subordinate filesystems

There is a place in overlayfs where it may touch a lower-layer inode during
RCU-mode pathwalk.  In this situation the combination of d_backing_inode() and
ACCESS_ONCE() does not compile, so institute and use a d_backing_inode_rcu()
function that combines these.

Signed-off-by: David Howells <dhowells@redhat.com>