The delegation is protected by RCU now, so we need to replace the nfsi->rwsem protection with an rcu protected section. Reported-by: Fred Isaman <iisaman@xxxxxxxxxx> Signed-off-by: Trond Myklebust <Trond.Myklebust@xxxxxxxxxx> --- fs/nfs/callback_proc.c | 6 +++--- 1 files changed, 3 insertions(+), 3 deletions(-) diff --git a/fs/nfs/callback_proc.c b/fs/nfs/callback_proc.c index 7445dd0..930d10f 100644 --- a/fs/nfs/callback_proc.c +++ b/fs/nfs/callback_proc.c @@ -37,8 +37,8 @@ __be32 nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres * if (inode == NULL) goto out_putclient; nfsi = NFS_I(inode); - down_read(&nfsi->rwsem); - delegation = nfsi->delegation; + rcu_read_lock(); + delegation = rcu_dereference(nfsi->delegation); if (delegation == NULL || (delegation->type & FMODE_WRITE) == 0) goto out_iput; res->size = i_size_read(inode); @@ -53,7 +53,7 @@ __be32 nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres * args->bitmap[1]; res->status = 0; out_iput: - up_read(&nfsi->rwsem); + rcu_read_unlock(); iput(inode); out_putclient: nfs_put_client(clp); -- 1.7.2 -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
