linux-kernel - Re: [PATCH v4 0/5] bitmap: Introduce alloc/free helpers

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Date:   Tue, 24 Jul 2018 14:35:53 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Alasdair Kergon <agk@...hat.com>,
        Mike Snitzer <snitzer@...hat.com>,
        device-mapper development <dm-devel@...hat.com>,
        Shaohua Li <shli@...nel.org>, linux-raid@...r.kernel.org,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        linux-input <linux-input@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Yury Norov <ynorov@...iumnetworks.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Joe Perches <joe@...ches.com>
Subject: Re: [PATCH v4 0/5] bitmap: Introduce alloc/free helpers

On Thu, 2018-07-05 at 00:30 +0300, Andy Shevchenko wrote:
> On Sat, Jun 30, 2018 at 11:17 PM, Andy Shevchenko
> <andriy.shevchenko@...ux.intel.com> wrote:
> > A lot of code is using allocation of bitmaps using BITS_PER_LONG()
> > macro and
> > sizeof(unsigned long) operator. The readability suffers because of
> > this.
> > 
> > The series introduces three helpers, i.e. bitmap_alloc(),
> > bitmap_zalloc() and
> > bitmap_free(), to make it more cleaner.
> > 
> 
> Dmitry, it seems we are all set now and if you have no objections
> against this version, it would be nice to see it in your tree followed
> by upstream.

Gentle ping!

> 
> > Patches 1 and 2 are preparatory to avoid namespace collisions
> > between
> > bitmap API and DM / MD bitmap. No functional changes intended.
> > 
> > Patch 3 introduces new helpers.
> > 
> > Patches 4 and 5 is just an example how to use new helpers. Locally I
> > have
> > like dozen of them against different subsystems and drivers.
> > 
> > Taking above into consideration it might make sense to have
> > an immutable branch for this cycle.
> > 
> > Ideally it would go through Input subsystem, thus, needs an Ack
> > from MD / DM maintainer(s).
> > 
> > Since v3:
> > - split DM part and do rename accordingly (Mike)
> > - explain better in the commit message why we can't make helpers as
> >   inliners (Dmitry, Andrew)
> > - drop applied orphaned patch
> > 
> > Since v2:
> > - fix compilation issue in MD bitmap code
> > - elaborate changes in commit message of patch 5
> > 
> > Since v1:
> > - added namespace fix patch against MD bitmap API
> > - moved functions to lib/bitmap.c to avoid circular dependencies
> > - appended Dmitry's tags
> > 
> > Andy Shevchenko (5):
> >   dm: Avoid namespace collision with bitmap API
> >   md: Avoid namespace collision with bitmap API
> >   bitmap: Add bitmap_alloc(), bitmap_zalloc() and bitmap_free()
> >   Input: gpio-keys - Switch to bitmap_zalloc()
> >   Input: evdev - Switch to bitmap API
> > 
> >  drivers/input/evdev.c                         |  16 +-
> >  drivers/input/keyboard/gpio_keys.c            |   8 +-
> >  drivers/md/dm-raid.c                          |   6 +-
> >  drivers/md/md-bitmap.c                        | 305 +++++++++----
> > -----
> >  drivers/md/md-bitmap.h                        |  60 ++--
> >  drivers/md/md-cluster.c                       |  18 +-
> >  drivers/md/md.c                               |  44 +--
> >  .../md/persistent-data/dm-space-map-common.c  |  20 +-
> >  drivers/md/raid1.c                            |  35 +-
> >  drivers/md/raid10.c                           |  52 ++-
> >  drivers/md/raid5-cache.c                      |   8 +-
> >  drivers/md/raid5.c                            |  44 +--
> >  include/linux/bitmap.h                        |   8 +
> >  lib/bitmap.c                                  |  19 ++
> >  14 files changed, 326 insertions(+), 317 deletions(-)
> > 
> > --
> > 2.18.0
> > 
> 
> 
> 

-- 
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Intel Finland Oy