linux-kernel - [PATCH 0/2] locking/rwsem: Add down_write

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Date:   Mon, 8 Mar 2021 15:54:54 -0500
From:   Zack Rusin <zackr@...are.com>
To:     <linux-kernel@...r.kernel.org>
CC:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>, Will Deacon <will@...nel.org>,
        Martin Krastev <krastevm@...are.com>,
        Roland Scheidegger <sroland@...are.com>,
        <dri-devel@...ts.freedesktop.org>
Subject: [PATCH 0/2] locking/rwsem: Add down_write_interruptible and use it

vmwgfx has really ugly implemention of an interruptible lock trying
to match rw sem semantics. By adding a small bit of code implementing
down_write_interruptible to rwsem which already supported
down_read_interruptible we can completely remove all of the custom
code from vmwgfx.

Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Will Deacon <will@...nel.org>
Cc: Martin Krastev <krastevm@...are.com>
Cc: Roland Scheidegger <sroland@...are.com>
Cc: linux-kernel@...r.kernel.org
Cc: dri-devel@...ts.freedesktop.org

Zack Rusin (2):
  locking/rwsem: Add down_write_interruptible
  drm/vmwgfx: Remove custom locking code

 drivers/gpu/drm/vmwgfx/Makefile               |   2 +-
 drivers/gpu/drm/vmwgfx/ttm_lock.c             | 194 ----------------
 drivers/gpu/drm/vmwgfx/ttm_lock.h             | 218 ------------------
 drivers/gpu/drm/vmwgfx/vmwgfx_bo.c            |  24 +-
 drivers/gpu/drm/vmwgfx/vmwgfx_context.c       |   4 +-
 drivers/gpu/drm/vmwgfx/vmwgfx_drv.c           |  57 +----
 drivers/gpu/drm/vmwgfx/vmwgfx_drv.h           |  32 ++-
 drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c       |   4 +-
 drivers/gpu/drm/vmwgfx/vmwgfx_fb.c            |  10 +-
 drivers/gpu/drm/vmwgfx/vmwgfx_ioctl.c         |   8 +-
 drivers/gpu/drm/vmwgfx/vmwgfx_kms.c           |   4 +-
 drivers/gpu/drm/vmwgfx/vmwgfx_resource.c      |   8 +-
 drivers/gpu/drm/vmwgfx/vmwgfx_shader.c        |   4 +-
 .../gpu/drm/vmwgfx/vmwgfx_simple_resource.c   |   4 +-
 drivers/gpu/drm/vmwgfx/vmwgfx_surface.c       |  16 +-
 include/linux/rwsem.h                         |   1 +
 kernel/locking/rwsem.c                        |  23 ++
 17 files changed, 98 insertions(+), 515 deletions(-)
 delete mode 100644 drivers/gpu/drm/vmwgfx/ttm_lock.c
 delete mode 100644 drivers/gpu/drm/vmwgfx/ttm_lock.h

-- 
2.27.0