drm/i915/gem: annotate maybe unused but set variable c

Prepare for re-enabling -Wunused-but-set-variable.

The variable 'c' appears unused, but I'm not sure what should be done
with it. Annotate it with __maybe_unused.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Reviewed-by: Jouni Högander <jouni.hogander@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/9ee9e7d7a0a7ad4ff03c14e64b95d3fbcb7885a4.1685119007.git.jani.nikula@intel.com

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_shmem.c b/drivers/gpu/drm/i915/gem/i915_gem_shmem.c
index cad4a6017f4b52e5ce5abc8379e1c07c7f6cf520..33d5d5178103b78f8d6a6cd3287f65ef59480bf5 100644 (file)
--- a/drivers/gpu/drm/i915/gem/i915_gem_shmem.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_shmem.c
@@ -455,7 +455,7 @@ shmem_pwrite(struct drm_i915_gem_object *obj,
                struct page *page;
                void *data, *vaddr;
                int err;
-               char c;
+               char __maybe_unused c;
 
                len = PAGE_SIZE - pg;
                if (len > remain)