drm/shmem-helper: Use refcount_t for pages_use_count

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Use atomic refcount_t helper for pages_use_count to optimize pin/unpin
functions by skipping reservation locking while GEM's pin refcount > 1.

Acked-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Suggested-by: Boris Brezillon <boris.brezillon@collabora.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.d>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250322212608.40511-9-dmitry.osipenko@collabora.com

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This commit is contained in:

Dmitry Osipenko 2025-03-23 00:26:06 +03:00

parent d586b535f1

commit 051b6646d3

5 changed files with 22 additions and 25 deletions

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33

drivers/gpu/drm/drm_gem_shmem_helper.c

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2

drivers/gpu/drm/lima/lima_gem.c

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2

drivers/gpu/drm/panfrost/panfrost_mmu.c

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8

drivers/gpu/drm/tests/drm_gem_shmem_test.c

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2

include/drm/drm_gem_shmem_helper.h

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