drm: Constify the drm_mm API
Mark up the pointers as constant through the API where appropriate.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20161216074718.32500-5-chris@chris-wilson.co.uk
diff --git a/drivers/gpu/drm/drm_mm.c b/drivers/gpu/drm/drm_mm.c
index 6e07355..7573661 100644
--- a/drivers/gpu/drm/drm_mm.c
+++ b/drivers/gpu/drm/drm_mm.c
@@ -174,9 +174,9 @@ INTERVAL_TREE_DEFINE(struct drm_mm_node, rb,
START, LAST, static inline, drm_mm_interval_tree)
struct drm_mm_node *
-__drm_mm_interval_first(struct drm_mm *mm, u64 start, u64 last)
+__drm_mm_interval_first(const struct drm_mm *mm, u64 start, u64 last)
{
- return drm_mm_interval_tree_iter_first(&mm->interval_tree,
+ return drm_mm_interval_tree_iter_first((struct rb_root *)&mm->interval_tree,
start, last);
}
EXPORT_SYMBOL(__drm_mm_interval_first);
@@ -881,9 +881,9 @@ EXPORT_SYMBOL(drm_mm_scan_remove_block);
* True if the allocator is completely free, false if there's still a node
* allocated in it.
*/
-bool drm_mm_clean(struct drm_mm * mm)
+bool drm_mm_clean(const struct drm_mm *mm)
{
- struct list_head *head = __drm_mm_nodes(mm);
+ const struct list_head *head = __drm_mm_nodes(mm);
return (head->next->next == head);
}
@@ -897,7 +897,7 @@ EXPORT_SYMBOL(drm_mm_clean);
*
* Note that @mm must be cleared to 0 before calling this function.
*/
-void drm_mm_init(struct drm_mm * mm, u64 start, u64 size)
+void drm_mm_init(struct drm_mm *mm, u64 start, u64 size)
{
INIT_LIST_HEAD(&mm->hole_stack);
mm->scanned_blocks = 0;
@@ -936,8 +936,8 @@ void drm_mm_takedown(struct drm_mm *mm)
}
EXPORT_SYMBOL(drm_mm_takedown);
-static u64 drm_mm_debug_hole(struct drm_mm_node *entry,
- const char *prefix)
+static u64 drm_mm_debug_hole(const struct drm_mm_node *entry,
+ const char *prefix)
{
u64 hole_start, hole_end, hole_size;
@@ -958,9 +958,9 @@ static u64 drm_mm_debug_hole(struct drm_mm_node *entry,
* @mm: drm_mm allocator to dump
* @prefix: prefix to use for dumping to dmesg
*/
-void drm_mm_debug_table(struct drm_mm *mm, const char *prefix)
+void drm_mm_debug_table(const struct drm_mm *mm, const char *prefix)
{
- struct drm_mm_node *entry;
+ const struct drm_mm_node *entry;
u64 total_used = 0, total_free = 0, total = 0;
total_free += drm_mm_debug_hole(&mm->head_node, prefix);
@@ -979,7 +979,7 @@ void drm_mm_debug_table(struct drm_mm *mm, const char *prefix)
EXPORT_SYMBOL(drm_mm_debug_table);
#if defined(CONFIG_DEBUG_FS)
-static u64 drm_mm_dump_hole(struct seq_file *m, struct drm_mm_node *entry)
+static u64 drm_mm_dump_hole(struct seq_file *m, const struct drm_mm_node *entry)
{
u64 hole_start, hole_end, hole_size;
@@ -1000,9 +1000,9 @@ static u64 drm_mm_dump_hole(struct seq_file *m, struct drm_mm_node *entry)
* @m: seq_file to dump to
* @mm: drm_mm allocator to dump
*/
-int drm_mm_dump_table(struct seq_file *m, struct drm_mm *mm)
+int drm_mm_dump_table(struct seq_file *m, const struct drm_mm *mm)
{
- struct drm_mm_node *entry;
+ const struct drm_mm_node *entry;
u64 total_used = 0, total_free = 0, total = 0;
total_free += drm_mm_dump_hole(m, &mm->head_node);