From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753458AbbJGXvm (ORCPT ); Wed, 7 Oct 2015 19:51:42 -0400 Received: from mx2.suse.de ([195.135.220.15]:56464 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751512AbbJGXvl (ORCPT ); Wed, 7 Oct 2015 19:51:41 -0400 From: Lee Duncan To: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Lee Duncan , James Bottomley , Tejun Heo , Hannes Reinecke , Johannes Thumshirn , Christoph Hellwig Subject: [PATCHv4 0/1] Update SCSI hosts to use ida for host number mgmt Date: Wed, 7 Oct 2015 16:51:33 -0700 Message-Id: X-Mailer: git-send-email 2.1.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch updates the SCSI hosts module to use the ida index-management routines to manage its host_no index instead of using an ATOMIC integer. This means that host numbers can now be reclaimed and re-used. NOTE: it was not feasible to use idr_*() functions instead of ida_*() functions, since using idr_find() without additional locking to find our Scsi_Host structure left a window between idr lookup and host structure deletion that would have required additional locking to close. Changes from v3: - Switched from idr to ida since managing our instance pointer required extra locking Changes from v2 and v1: - First two version used idr instead of ida Lee Duncan (1): SCSI: hosts: update to use ida_simple for host_no management drivers/scsi/hosts.c | 22 ++++++++++++++-------- 1 file changed, 14 insertions(+), 8 deletions(-) -- 2.1.4