linux-kernel - [PATCH 0/9] drm/i915: Replace kmap_atomic() with kmap_local

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Date:   Mon, 17 Oct 2022 17:37:16 +0800
From:   Zhao Liu <zhao1.liu@...ux.intel.com>
To:     Jani Nikula <jani.nikula@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Matthew Auld <matthew.auld@...el.com>,
        Thomas Hellström 
        <thomas.hellstrom@...ux.intel.com>,
        Nirmoy Das <nirmoy.das@...el.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Chris Wilson <chris@...is-wilson.co.uk>,
        Christian König <christian.koenig@....com>,
        intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Cc:     Ira Weiny <ira.weiny@...el.com>,
        "Fabio M . De Francesco" <fmdefrancesco@...il.com>,
        Zhenyu Wang <zhenyu.z.wang@...el.com>,
        Zhao Liu <zhao1.liu@...el.com>
Subject: [PATCH 0/9] drm/i915: Replace kmap_atomic() with kmap_local_page()

From: Zhao Liu <zhao1.liu@...el.com>

The use of kmap_atomic() is being deprecated in favor of
kmap_local_page()[1].

In the following patches, we can convert the calls of kmap_atomic() /
kunmap_atomic() to kmap_local_page() / kunmap_local(), which can
instead do the mapping / unmapping regardless of the context.

With kmap_local_page(), the mapping is per thread, CPU local and not
globally visible.

[1]: https://lore.kernel.org/all/20220813220034.806698-1-ira.weiny@intel.com
---
Zhao Liu (9):
  drm/i915: Use kmap_local_page() in gem/i915_gem_object.c
  drm/i915: Use kmap_local_page() in gem/i915_gem_pyhs.c
  drm/i915: Use kmap_local_page() in gem/i915_gem_shmem.c
  drm/i915: Use kmap_local_page() in gem/selftests/huge_pages.c
  drm/i915: Use kmap_local_page() in gem/selftests/i915_gem_coherency.c
  drm/i915: Use kmap_local_page() in gem/selftests/i915_gem_context.c
  drm/i915: Use memcpy_from_page() in gt/uc/intel_uc_fw.c
  drm/i915: Use kmap_local_page() in i915_cmd_parser.c
  drm/i915: Use kmap_local_page() in gem/i915_gem_execbuffer.c

 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c       | 10 +++++-----
 drivers/gpu/drm/i915/gem/i915_gem_object.c           |  8 +++-----
 drivers/gpu/drm/i915/gem/i915_gem_phys.c             |  8 ++++----
 drivers/gpu/drm/i915/gem/i915_gem_shmem.c            |  6 ++++--
 drivers/gpu/drm/i915/gem/selftests/huge_pages.c      |  6 +++---
 .../gpu/drm/i915/gem/selftests/i915_gem_coherency.c  | 12 ++++--------
 .../gpu/drm/i915/gem/selftests/i915_gem_context.c    |  8 ++++----
 drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c             |  5 +----
 drivers/gpu/drm/i915/i915_cmd_parser.c               |  4 ++--
 9 files changed, 30 insertions(+), 37 deletions(-)

-- 
2.34.1