diff options
| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2011-02-18 17:59:15 +0100 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2011-02-23 10:32:57 +1000 |
| commit | ae0cec2880a4dc6d90c7f8392bdc6705988389ca (patch) | |
| tree | 02a36c6ff5eb3e9f0554d9b5134ab374929c61fb | |
| parent | b0b7af1884b7d807a3504804f9825d472de78708 (diff) | |
drm: mm: add helper to unwind scan state
With the switch to implicit free space accounting one pointer
got unused when scanning. Use it to create a single-linked list
to ensure correct unwinding of the scan state.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
| -rw-r--r-- | drivers/gpu/drm/drm_mm.c | 4 | ||||
| -rw-r--r-- | include/drm/drm_mm.h | 8 |
2 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_mm.c b/drivers/gpu/drm/drm_mm.c index d6432f9e49c..add1737dae0 100644 --- a/drivers/gpu/drm/drm_mm.c +++ b/drivers/gpu/drm/drm_mm.c @@ -460,6 +460,7 @@ void drm_mm_init_scan(struct drm_mm *mm, unsigned long size, mm->scan_hit_start = 0; mm->scan_hit_size = 0; mm->scan_check_range = 0; + mm->prev_scanned_node = NULL; } EXPORT_SYMBOL(drm_mm_init_scan); @@ -485,6 +486,7 @@ void drm_mm_init_scan_with_range(struct drm_mm *mm, unsigned long size, mm->scan_start = start; mm->scan_end = end; mm->scan_check_range = 1; + mm->prev_scanned_node = NULL; } EXPORT_SYMBOL(drm_mm_init_scan_with_range); @@ -514,6 +516,8 @@ int drm_mm_scan_add_block(struct drm_mm_node *node) prev_node->hole_follows = 1; list_del(&node->node_list); node->node_list.prev = &prev_node->node_list; + node->node_list.next = &mm->prev_scanned_node->node_list; + mm->prev_scanned_node = node; hole_start = drm_mm_hole_node_start(prev_node); hole_end = drm_mm_hole_node_end(prev_node); diff --git a/include/drm/drm_mm.h b/include/drm/drm_mm.h index 17a070e11d3..b1e7809e5e1 100644 --- a/include/drm/drm_mm.h +++ b/include/drm/drm_mm.h @@ -72,6 +72,7 @@ struct drm_mm { unsigned scanned_blocks; unsigned long scan_start; unsigned long scan_end; + struct drm_mm_node *prev_scanned_node; }; static inline bool drm_mm_node_allocated(struct drm_mm_node *node) @@ -86,6 +87,13 @@ static inline bool drm_mm_initialized(struct drm_mm *mm) #define drm_mm_for_each_node(entry, mm) list_for_each_entry(entry, \ &(mm)->head_node.node_list, \ node_list); +#define drm_mm_for_each_scanned_node_reverse(entry, n, mm) \ + for (entry = (mm)->prev_scanned_node, \ + next = entry ? list_entry(entry->node_list.next, \ + struct drm_mm_node, node_list) : NULL; \ + entry != NULL; entry = next, \ + next = entry ? list_entry(entry->node_list.next, \ + struct drm_mm_node, node_list) : NULL) \ /* * Basic range manager support (drm_mm.c) */ |