On 5/28/2025 1:13 AM, Natalie Vock wrote:
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:sta...@vger.kernel.org
Signed-off-by: Natalie Vock<natalie.v...@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;
The users should not modify this DRM_BUDDY_HEADER_CLEAR flag directly;
instead, please use the DRM_BUDDY_CLEARED flag in the driver.
The buddy manager will take care of this DRM_BUDDY_HEADER_CLEAR flag.
+}
+
int drm_buddy_init(struct drm_buddy *mm, u64 size, u64 chunk_size);
void drm_buddy_fini(struct drm_buddy *mm);
