From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lee Duncan 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: Return-path: Sender: linux-kernel-owner@vger.kernel.org To: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Lee Duncan , James Bottomley , Tejun Heo , Hannes Reinecke , Johannes Thumshirn , Christoph Hellwig List-Id: linux-scsi@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