nfsd41: add OPEN4_SHARE_ACCESS_WANT nfs4_stateid bmap

Separate the access bits from the want bits and enable __set_bit to
work correctly with st_access_bmap.

Signed-off-by: Andy Adamson<andros@netapp.com>
Signed-off-by: NBenny Halevy <bhalevy@panasas.com>
Signed-off-by: NJ. Bruce Fields <bfields@citi.umich.edu>

fs/nfsd/nfs4state.c

@@ -1889,7 +1889,8 @@ init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *
 	stp->st_stateid.si_generation = 0;
 	stp->st_access_bmap = 0;
 	stp->st_deny_bmap = 0;
-	__set_bit(open->op_share_access, &stp->st_access_bmap);
+	__set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK,
+		  &stp->st_access_bmap);
 	__set_bit(open->op_share_deny, &stp->st_deny_bmap);
 	stp->st_openstp = NULL;
 }