[PATCH 1/2] drm/buddy: stop using PAGE_SIZE

[Matthew Auld]

The drm_buddy minimum page-size requirements should be distinct from the
CPU PAGE_SIZE. Only restriction is that the minimum page-size is at
least 4K.

Signed-off-by: Matthew Auld <matthew.auld at intel.com>
Cc: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam at amd.com>
Cc: Christian König <christian.koenig at amd.com>
Cc: Arnd Bergmann <arnd at arndb.de>
---
 drivers/gpu/drm/drm_buddy.c | 2 +-
 include/drm/drm_buddy.h     | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/drm_buddy.c b/drivers/gpu/drm/drm_buddy.c
index 5ebdd6f8f36e..f999568d69c1 100644
--- a/drivers/gpu/drm/drm_buddy.c
+++ b/drivers/gpu/drm/drm_buddy.c
@@ -102,7 +102,7 @@ int drm_buddy_init(struct drm_buddy *mm, u64 size, u64 chunk_size)
 	if (size < chunk_size)
 		return -EINVAL;
 
-	if (chunk_size < PAGE_SIZE)
+	if (chunk_size < SZ_4K)
 		return -EINVAL;
 
 	if (!is_power_of_2(chunk_size))
diff --git a/include/drm/drm_buddy.h b/include/drm/drm_buddy.h
index a5b39fc01003..19ed661a32f3 100644
--- a/include/drm/drm_buddy.h
+++ b/include/drm/drm_buddy.h
@@ -53,8 +53,8 @@ struct drm_buddy_block {
 	struct list_head tmp_link;
 };
 
-/* Order-zero must be at least PAGE_SIZE */
-#define DRM_BUDDY_MAX_ORDER (63 - PAGE_SHIFT)
+/* Order-zero must be at least SZ_4K */
+#define DRM_BUDDY_MAX_ORDER (63 - 12)
 
 /*
  * Binary Buddy System.
@@ -82,7 +82,7 @@ struct drm_buddy {
 	unsigned int n_roots;
 	unsigned int max_order;
 
-	/* Must be at least PAGE_SIZE */
+	/* Must be at least SZ_4K */
 	u64 chunk_size;
 	u64 size;
 	u64 avail;
-- 
2.43.2