linux-kernel - [patch 0/7] drm, highmem: Cleanup io/kmap

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Date:   Wed, 03 Mar 2021 14:20:23 +0100
From:   Thomas Gleixner <tglx@...utronix.de>
To:     LKML <linux-kernel@...r.kernel.org>
cc:     Christian Koenig <christian.koenig@....com>,
        Huang Rui <ray.huang@....com>, David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org,
        VMware Graphics <linux-graphics-maintainer@...are.com>,
        Roland Scheidegger <sroland@...are.com>,
        Zack Rusin <zackr@...are.com>,
        Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        Gerd Hoffmann <kraxel@...hat.com>,
        virtualization@...ts.linux-foundation.org,
        spice-devel@...ts.freedesktop.org, Ben Skeggs <bskeggs@...hat.com>,
        nouveau@...ts.freedesktop.org,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Chris Wilson <chris@...is-wilson.co.uk>,
        intel-gfx@...ts.freedesktop.org
Subject: [patch 0/7] drm, highmem: Cleanup io/kmap_atomic*() usage

None of the DRM usage sites of temporary mappings requires the side
effects of io/kmap_atomic(), i.e. preemption and pagefault disable.

Replace them with the io/kmap_local() variants, simplify the
copy_to/from_user() error handling and remove the atomic variants.

Thanks,

	tglx
---
 Documentation/driver-api/io-mapping.rst             |   22 +++-------
 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c      |    7 +--
 drivers/gpu/drm/i915/i915_gem.c                     |   40 ++++++-------------
 drivers/gpu/drm/i915/selftests/i915_gem.c           |    4 -
 drivers/gpu/drm/i915/selftests/i915_gem_gtt.c       |    8 +--
 drivers/gpu/drm/nouveau/nvkm/subdev/devinit/fbmem.h |    8 +--
 drivers/gpu/drm/qxl/qxl_image.c                     |   18 ++++----
 drivers/gpu/drm/qxl/qxl_ioctl.c                     |   27 ++++++------
 drivers/gpu/drm/qxl/qxl_object.c                    |   12 ++---
 drivers/gpu/drm/qxl/qxl_object.h                    |    4 -
 drivers/gpu/drm/qxl/qxl_release.c                   |    4 -
 drivers/gpu/drm/ttm/ttm_bo_util.c                   |   20 +++++----
 drivers/gpu/drm/vmwgfx/vmwgfx_blit.c                |   30 +++++---------
 include/linux/highmem-internal.h                    |   14 ------
 include/linux/io-mapping.h                          |   42 --------------------
 15 files changed, 93 insertions(+), 167 deletions(-)