From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Subject: Re: [dm-devel] [RFC PATCH 00/32] separate operations from flags in the bio/request structs Date: Sat, 7 Nov 2015 02:23:09 -0800 Message-ID: <20151107102309.GE12117@infradead.org> References: <1446654807-6935-1-git-send-email-mchristi@redhat.com> <563A36FC.6010001@sandisk.com> <563A3813.5010604@cs.wisc.edu> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: linux-scsi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-raid-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, device-mapper development , linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, drbd-dev-cunTk1MwBs8qoQakbn7OcQ@public.gmane.org To: Mike Christie Return-path: Content-Disposition: inline In-Reply-To: <563A3813.5010604-hcNo3dDEHLuVc3sceRu5cw@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: drbd-dev-bounces-cunTk1MwBs8qoQakbn7OcQ@public.gmane.org Errors-To: drbd-dev-bounces-cunTk1MwBs8qoQakbn7OcQ@public.gmane.org List-Id: linux-fsdevel.vger.kernel.org On Wed, Nov 04, 2015 at 10:53:39AM -0600, Mike Christie wrote: > > If you have to touch submit_bio() and submit_bio_wait(), how about > > requiring the callers of these functions to set the cmd and flags > > arguments in the bio structure and to leave out the cmd and flags > > arguments from the submit_bio() and submit_bio_wait() functions ? A > > (compile tested only) patch that implements this idea is available at > > https://lkml.org/lkml/2014/6/2/173. > > > > Yeah, I can do that. I think this would be useful to do at the beginning of the series. While this will have a huge trickle effect through the series it should make thing a bit simpler overall. By leaving op 0 undefined it should also help to create a nice error trap for unconverted code.