Patch "drm/i915/fence: Mark debug_fence_init_onstack() with __maybe_unused" has been added to the 5.4-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_init_onstack() with __maybe_unused

to the 5.4-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_init_onstack-with-__.patch
and it can be found in the queue-5.4 subdirectory.

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



commit a81b153328ea39c0e5a1691723c2387ba6ea063b
Author: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Date:   Thu Aug 29 18:58:37 2024 +0300

    drm/i915/fence: Mark debug_fence_init_onstack() with __maybe_unused
    
    [ Upstream commit fcd9e8afd546f6ced378d078345a89bf346d065e ]
    
    When debug_fence_init_onstack() is unused (CONFIG_DRM_I915_SELFTEST=n),
    it prevents kernel builds with clang, `make W=1` and CONFIG_WERROR=y:
    
    .../i915_sw_fence.c:97:20: error: unused function 'debug_fence_init_onstack' [-Werror,-Wunused-function]
       97 | static inline void debug_fence_init_onstack(struct i915_sw_fence *fence)
          |                    ^~~~~~~~~~~~~~~~~~~~~~~~
    
    Fix this by marking debug_fence_init_onstack() with __maybe_unused.
    
    See also commit 6863f5643dd7 ("kbuild: allow Clang to find unused static
    inline functions for W=1 build").
    
    Fixes: 214707fc2ce0 ("drm/i915/selftests: Wrap a timer into a i915_sw_fence")
    Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
    Reviewed-by: Jani Nikula <jani.nikula@xxxxxxxxx>
    Link: https://patchwork.freedesktop.org/patch/msgid/20240829155950.1141978-2-andriy.shevchenko@xxxxxxxxxxxxxxx
    Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
    (cherry picked from commit 5bf472058ffb43baf6a4cdfe1d7f58c4c194c688)
    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 b3fd6ff665da..475e4b9485af 100644
--- a/drivers/gpu/drm/i915/i915_sw_fence.c
+++ b/drivers/gpu/drm/i915/i915_sw_fence.c
@@ -38,7 +38,7 @@ static inline void debug_fence_init(struct i915_sw_fence *fence)
 	debug_object_init(fence, &i915_sw_fence_debug_descr);
 }
 
-static inline void debug_fence_init_onstack(struct i915_sw_fence *fence)
+static inline __maybe_unused void debug_fence_init_onstack(struct i915_sw_fence *fence)
 {
 	debug_object_init_on_stack(fence, &i915_sw_fence_debug_descr);
 }
@@ -81,7 +81,7 @@ static inline void debug_fence_init(struct i915_sw_fence *fence)
 {
 }
 
-static inline void debug_fence_init_onstack(struct i915_sw_fence *fence)
+static inline __maybe_unused void debug_fence_init_onstack(struct i915_sw_fence *fence)
 {
 }