Cleared blocks that are handed out to users after allocation cannot be presumed to remain cleared. Thus, allocators using drm_buddy need to dirty all blocks on the allocation success path. Provide a helper for them to use.

Fixes: 96950929eb232 ("drm/buddy: Implement tracking clear page feature") Cc: stable@vger.kernel.org

Signed-off-by: Natalie Vock natalie.vock@gmx.de --- include/drm/drm_buddy.h | 6 ++++++ 1 file changed, 6 insertions(+)

diff --git a/include/drm/drm_buddy.h b/include/drm/drm_buddy.h index 9689a7c5dd36..48628ff1c24f 100644 --- a/include/drm/drm_buddy.h +++ b/include/drm/drm_buddy.h @@ -142,6 +142,12 @@ drm_buddy_block_size(struct drm_buddy *mm, return mm->chunk_size << drm_buddy_block_order(block); }

+static inline void +drm_buddy_block_set_dirty(struct drm_buddy_block *block) +{ + block->header &= ~DRM_BUDDY_HEADER_CLEAR; +} + int drm_buddy_init(struct drm_buddy *mm, u64 size, u64 chunk_size);

void drm_buddy_fini(struct drm_buddy *mm);