This is a note to let you know that I've just added the patch titled
drm/mm: Mark drm_mm_interval_tree*() functions with __maybe_unused
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-mm-mark-drm_mm_interval_tree-functions-with-__ma.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f66c800ff539f193d6f457d79cfd8903b68a3b3d
Author: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Date: Thu Aug 29 18:46:40 2024 +0300
drm/mm: Mark drm_mm_interval_tree*() functions with __maybe_unused
[ Upstream commit 53bd7c1c0077db533472ae32799157758302ef48 ]
The INTERVAL_TREE_DEFINE() uncoditionally provides a bunch of helper
functions which in some cases may be not used. This, in particular,
prevents kernel builds with clang, `make W=1` and CONFIG_WERROR=y:
.../drm/drm_mm.c:152:1: error: unused function 'drm_mm_interval_tree_insert' [-Werror,-Wunused-function]
152 | INTERVAL_TREE_DEFINE(struct drm_mm_node, rb,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
153 | u64, __subtree_last,
| ~~~~~~~~~~~~~~~~~~~~
154 | START, LAST, static inline, drm_mm_interval_tree)
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Fix this by marking drm_mm_interval_tree*() functions with __maybe_unused.
See also commit 6863f5643dd7 ("kbuild: allow Clang to find unused static
inline functions for W=1 build").
Fixes: 202b52b7fbf7 ("drm: Track drm_mm nodes with an interval tree")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Reviewed-by: Jani Nikula <jani.nikula@xxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20240829154640.1120050-1-andriy.shevchenko@xxxxxxxxxxxxxxx
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/drm_mm.c b/drivers/gpu/drm/drm_mm.c
index 3cc5fbd78ee20..d7d9fc093c30f 100644
--- a/drivers/gpu/drm/drm_mm.c
+++ b/drivers/gpu/drm/drm_mm.c
@@ -164,7 +164,7 @@ static void show_leaks(struct drm_mm *mm) { }
INTERVAL_TREE_DEFINE(struct drm_mm_node, rb,
u64, __subtree_last,
- START, LAST, static inline, drm_mm_interval_tree)
+ START, LAST, static inline __maybe_unused, drm_mm_interval_tree)
struct drm_mm_node *
__drm_mm_interval_first(const struct drm_mm *mm, u64 start, u64 last)
