Patch "drm/i915/fence: Mark debug_fence_free() with __maybe_unused" has been added to the 5.10-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    drm/i915/fence: Mark debug_fence_free() with __maybe_unused

to the 5.10-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-i915-fence-mark-debug_fence_free-with-__maybe_un.patch
and it can be found in the queue-5.10 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 12991072a4be9698eb51f9dadf5ce9a618477ae8
Author: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Date:   Thu Aug 29 18:58:38 2024 +0300

    drm/i915/fence: Mark debug_fence_free() with __maybe_unused
    
    [ Upstream commit f99999536128b14b5d765a9982763b5134efdd79 ]
    
    When debug_fence_free() is unused
    (CONFIG_DRM_I915_SW_FENCE_DEBUG_OBJECTS=n), it prevents kernel builds
    with clang, `make W=1` and CONFIG_WERROR=y:
    
    .../i915_sw_fence.c:118:20: error: unused function 'debug_fence_free' [-Werror,-Wunused-function]
      118 | static inline void debug_fence_free(struct i915_sw_fence *fence)
          |                    ^~~~~~~~~~~~~~~~
    
    Fix this by marking debug_fence_free() with __maybe_unused.
    
    See also commit 6863f5643dd7 ("kbuild: allow Clang to find unused static
    inline functions for W=1 build").
    
    Fixes: fc1584059d6c ("drm/i915: Integrate i915_sw_fence with debugobjects")
    Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
    Reviewed-by: Jani Nikula <jani.nikula@xxxxxxxxx>
    Link: https://patchwork.freedesktop.org/patch/msgid/20240829155950.1141978-3-andriy.shevchenko@xxxxxxxxxxxxxxx
    Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
    (cherry picked from commit 8be4dce5ea6f2368cc25edc71989c4690fa66964)
    Signed-off-by: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/gpu/drm/i915/i915_sw_fence.c b/drivers/gpu/drm/i915/i915_sw_fence.c
index 1c4498c29f25..136a7163477d 100644
--- a/drivers/gpu/drm/i915/i915_sw_fence.c
+++ b/drivers/gpu/drm/i915/i915_sw_fence.c
@@ -70,7 +70,7 @@ static inline void debug_fence_destroy(struct i915_sw_fence *fence)
 	debug_object_destroy(fence, &i915_sw_fence_debug_descr);
 }
 
-static inline void debug_fence_free(struct i915_sw_fence *fence)
+static inline __maybe_unused void debug_fence_free(struct i915_sw_fence *fence)
 {
 	debug_object_free(fence, &i915_sw_fence_debug_descr);
 	smp_wmb(); /* flush the change in state before reallocation */
@@ -108,7 +108,7 @@ static inline void debug_fence_destroy(struct i915_sw_fence *fence)
 {
 }
 
-static inline void debug_fence_free(struct i915_sw_fence *fence)
+static inline __maybe_unused void debug_fence_free(struct i915_sw_fence *fence)
 {
 }