[05/13] drm: remove drm_buddy_alloc_range

Commit Message

Paneer Selvam, Arunpravin Oct. 19, 2021, 10:54 p.m. UTC

This function becomes obsolete and may be removed.

Signed-off-by: Arunpravin <[e-mail]>
---
 drivers/gpu/drm/drm_buddy.c | 101 ------------------------------------
 include/drm/drm_buddy.h     |   4 --
 2 files changed, 105 deletions(-)

Patch

diff --git a/drivers/gpu/drm/drm_buddy.c b/drivers/gpu/drm/drm_buddy.c
index f5f299dd9131..138e9f1a7340 100644
--- a/drivers/gpu/drm/drm_buddy.c
+++ b/drivers/gpu/drm/drm_buddy.c
@@ -457,107 +457,6 @@  int drm_buddy_alloc(struct drm_buddy_mm *mm,
 	return err;
 }
 
-/*
- * Allocate range. Note that it's safe to chain together multiple alloc_ranges
- * with the same blocks list.
- *
- * Intended for pre-allocating portions of the address space, for example to
- * reserve a block for the initial framebuffer or similar, hence the expectation
- * here is that drm_buddy_alloc() is still the main vehicle for
- * allocations, so if that's not the case then the drm_mm range allocator is
- * probably a much better fit, and so you should probably go use that instead.
- */
-int drm_buddy_alloc_range(struct drm_buddy_mm *mm,
-			  struct list_head *blocks,
-			  u64 start, u64 size)
-{
-	struct drm_buddy_block *block;
-	struct drm_buddy_block *buddy;
-	LIST_HEAD(allocated);
-	LIST_HEAD(dfs);
-	u64 end;
-	int err;
-	int i;
-
-	if (size < mm->chunk_size)
-		return -EINVAL;
-
-	if (!IS_ALIGNED(size | start, mm->chunk_size))
-		return -EINVAL;
-
-	if (range_overflows(start, size, mm->size))
-		return -EINVAL;
-
-	for (i = 0; i < mm->n_roots; ++i)
-		list_add_tail(&mm->roots[i]->tmp_link, &dfs);
-
-	end = start + size - 1;
-
-	do {
-		u64 block_start;
-		u64 block_end;
-
-		block = list_first_entry_or_null(&dfs,
-						 struct drm_buddy_block,
-						 tmp_link);
-		if (!block)
-			break;
-
-		list_del(&block->tmp_link);
-
-		block_start = drm_buddy_block_offset(block);
-		block_end = block_start + drm_buddy_block_size(mm, block) - 1;
-
-		if (!overlaps(start, end, block_start, block_end))
-			continue;
-
-		if (drm_buddy_block_is_allocated(block)) {
-			err = -ENOSPC;
-			goto err_free;
-		}
-
-		if (contains(start, end, block_start, block_end)) {
-			if (!drm_buddy_block_is_free(block)) {
-				err = -ENOSPC;
-				goto err_free;
-			}
-
-			mark_allocated(block);
-			mm->avail -= drm_buddy_block_size(mm, block);
-			list_add_tail(&block->link, &allocated);
-			continue;
-		}
-
-		if (!drm_buddy_block_is_split(block)) {
-			err = split_block(mm, block);
-			if (unlikely(err))
-				goto err_undo;
-		}
-
-		list_add(&block->right->tmp_link, &dfs);
-		list_add(&block->left->tmp_link, &dfs);
-	} while (1);
-
-	list_splice_tail(&allocated, blocks);
-	return 0;
-
-err_undo:
-	/*
-	 * We really don't want to leave around a bunch of split blocks, since
-	 * bigger is better, so make sure we merge everything back before we
-	 * free the allocated blocks.
-	 */
-	buddy = get_buddy(block);
-	if (buddy &&
-	    (drm_buddy_block_is_free(block) &&
-	     drm_buddy_block_is_free(buddy)))
-		__drm_buddy_free(mm, block);
-
-err_free:
-	drm_buddy_free_list(mm, &allocated);
-	return err;
-}
-
 void drm_buddy_block_print(struct drm_buddy_mm *mm,
 			   struct drm_buddy_block *block,
 			   struct drm_printer *p)
diff --git a/include/drm/drm_buddy.h b/include/drm/drm_buddy.h
index c64fd4062cb6..ebf03d151845 100644
--- a/include/drm/drm_buddy.h
+++ b/include/drm/drm_buddy.h
@@ -144,10 +144,6 @@  int drm_buddy_alloc(struct drm_buddy_mm *mm,
 		    struct list_head *blocks,
 		    unsigned long flags);
 
-int drm_buddy_alloc_range(struct drm_buddy_mm *mm,
-			   struct list_head *blocks,
-			   u64 start, u64 size);
-
 void drm_buddy_free(struct drm_buddy_mm *mm, struct drm_buddy_block *block);
 
 void drm_buddy_free_list(struct drm_buddy_mm *mm, struct list_head *objects);