[PATCH 1/2] drm/buddy: Add public helper to dirty blocks

[Natalie Vock]

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 at vger.kernel.org

Signed-off-by: Natalie Vock <natalie.vock at 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);
-- 
2.49.0