[PATCH] drm/mm: annotate drm_mm_node_scanned_block() with __maybe_unused

[Jani Nikula <jani.nikula@xxxxxxxxx>]

Clang build with CONFIG_DRM_DEBUG_MM=n, CONFIG_WERROR=y, and W=1 leads
to:

  CC [M]  drivers/gpu/drm/drm_mm.o
../drivers/gpu/drm/drm_mm.c:614:20: error: function 'drm_mm_node_scanned_block' is not needed and will not be emitted [-Werror,-Wunneeded-internal-declaration]
static inline bool drm_mm_node_scanned_block(const struct drm_mm_node *node)
                   ^

Fix this by annotating drm_mm_node_scanned_block() with __maybe_unused.

Cc: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
---
 drivers/gpu/drm/drm_mm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_mm.c b/drivers/gpu/drm/drm_mm.c
index 1ed68d3cd80b..ca254611b382 100644
--- a/drivers/gpu/drm/drm_mm.c
+++ b/drivers/gpu/drm/drm_mm.c
@@ -611,7 +611,7 @@ int drm_mm_insert_node_in_range(struct drm_mm * const mm,
 }
 EXPORT_SYMBOL(drm_mm_insert_node_in_range);
 
-static inline bool drm_mm_node_scanned_block(const struct drm_mm_node *node)
+static inline __maybe_unused bool drm_mm_node_scanned_block(const struct drm_mm_node *node)
 {
 	return test_bit(DRM_MM_NODE_SCANNED_BIT, &node->flags);
 }
-- 
2.39.2