linux-kernel - Re: [PATCH 03/33] gadget: remove only user of aio retry

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Message-ID: <x49ppxzu558.fsf@segfault.boston.devel.redhat.com>
Date:	Fri, 12 Apr 2013 11:42:43 -0400
From:	Jeff Moyer <jmoyer@...hat.com>
To:	Kent Overstreet <koverstreet@...gle.com>
Cc:	linux-kernel@...r.kernel.org, linux-aio@...ck.org,
	akpm@...ux-foundation.org, Zach Brown <zab@...hat.com>,
	Felipe Balbi <balbi@...com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Mark Fasheh <mfasheh@...e.com>,
	Joel Becker <jlbec@...lplan.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Jens Axboe <axboe@...nel.dk>,
	Asai Thambi S P <asamymuthupa@...ron.com>,
	Selvan Mani <smani@...ron.com>,
	Sam Bradshaw <sbradshaw@...ron.com>,
	Al Viro <viro@...iv.linux.org.uk>,
	Benjamin LaHaise <bcrl@...ck.org>,
	"Theodore Ts'o" <tytso@....edu>
Subject: Re: [PATCH 03/33] gadget: remove only user of aio retry

Kent Overstreet <koverstreet@...gle.com> writes:

> From: Zach Brown <zab@...hat.com>
>
> This removes the only in-tree user of aio retry.  This will let us remove
> the retry code from the aio core.
>
> Removing retry is relatively easy as the USB gadget wasn't using it to
> retry IOs at all.  It always fully submitted the IO in the context of the
> initial io_submit() call.  It only used the AIO retry facility to get the
> submitter's mm context for copying the result of a read back to user
> space.  This is easy to implement with use_mm() and a work struct, much
> like kvm does with async_pf_execute() for get_user_pages().
>
> Signed-off-by: Zach Brown <zab@...hat.com>
> Signed-off-by: Kent Overstreet <koverstreet@...gle.com>
> Cc: Felipe Balbi <balbi@...com>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Cc: Mark Fasheh <mfasheh@...e.com>
> Cc: Joel Becker <jlbec@...lplan.org>
> Cc: Rusty Russell <rusty@...tcorp.com.au>
> Cc: Jens Axboe <axboe@...nel.dk>
> Cc: Asai Thambi S P <asamymuthupa@...ron.com>
> Cc: Selvan Mani <smani@...ron.com>
> Cc: Sam Bradshaw <sbradshaw@...ron.com>
> Cc: Jeff Moyer <jmoyer@...hat.com>
> Cc: Al Viro <viro@...iv.linux.org.uk>
> Cc: Benjamin LaHaise <bcrl@...ck.org>
> Cc: Theodore Ts'o <tytso@....edu>
> Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>

Acked-by: Jeff Moyer <jmoyer@...hat.com>
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