fs/affs: make export work with cold dcache
This adds get_parent function so that nfs client can still work after cache drop (Tested on NFS v4 with echo 3 > /proc/sys/vm/drop_caches) [weiyongjun1@huawei.com: fix return value check in affs_get_parent()] Link: http://lkml.kernel.org/r/20170123141018.2331-1-weiyj.lk@gmail.com Link: http://lkml.kernel.org/r/20170109191208.6085-8-fabf@skynet.beSigned-off-by:Fabian Frederick <fabf@skynet.be> Signed-off-by:
Wei Yongjun <weiyongjun1@huawei.com> Suggested-by:
Alexander Viro <viro@zeniv.linux.org.uk> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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