174 	if (!test_and_set_bit(PG_HEADLOCK, &head->wb_flags))  in nfs_page_group_lock()
178 		return wait_on_bit_lock(&head->wb_flags, PG_HEADLOCK,  in nfs_page_group_lock()
197 	wait_on_bit(&head->wb_flags, PG_HEADLOCK,  in nfs_page_group_lock_wait()
213 	clear_bit(PG_HEADLOCK, &head->wb_flags);  in nfs_page_group_unlock()
215 	wake_up_bit(&head->wb_flags, PG_HEADLOCK);  in nfs_page_group_unlock()
229 	WARN_ON_ONCE(!test_bit(PG_HEADLOCK, &head->wb_flags));  in nfs_page_group_sync_on_bit_locked()
230 	WARN_ON_ONCE(test_and_set_bit(bit, &req->wb_flags));  in nfs_page_group_sync_on_bit_locked()
234 		if (!test_bit(bit, &tmp->wb_flags))  in nfs_page_group_sync_on_bit_locked()
242 		clear_bit(bit, &tmp->wb_flags);  in nfs_page_group_sync_on_bit_locked()
285 		WARN_ON_ONCE(!test_bit(PG_HEADLOCK, &prev->wb_head->wb_flags));  in nfs_page_group_init()
297 		if (test_bit(PG_INODE_REF, &prev->wb_head->wb_flags)) {  in nfs_page_group_init()
299 			set_bit(PG_INODE_REF, &req->wb_flags);  in nfs_page_group_init()
401 	clear_bit(PG_BUSY, &req->wb_flags);  in nfs_unlock_request()
403 	wake_up_bit(&req->wb_flags, PG_BUSY);  in nfs_unlock_request()
455 	WARN_ON_ONCE(test_bit(PG_TEARDOWN, &req->wb_flags));  in nfs_free_request()
456 	WARN_ON_ONCE(test_bit(PG_UNLOCKPAGE, &req->wb_flags));  in nfs_free_request()
457 	WARN_ON_ONCE(test_bit(PG_UPTODATE, &req->wb_flags));  in nfs_free_request()
458 	WARN_ON_ONCE(test_bit(PG_WB_END, &req->wb_flags));  in nfs_free_request()
459 	WARN_ON_ONCE(test_bit(PG_REMOVE, &req->wb_flags));  in nfs_free_request()
481 	return wait_on_bit_io(&req->wb_flags, PG_BUSY,  in nfs_wait_on_request()