linux-kernel - [PATCH 19/30] drm/amd/display/dc/core/dc_link_dp: Mark 'result_write_min_hblank' as __maybe

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Date:   Wed, 13 Jan 2021 08:07:41 +0000
From:   Lee Jones <lee.jones@...aro.org>
To:     lee.jones@...aro.org
Cc:     linux-kernel@...r.kernel.org,
        Harry Wentland <harry.wentland@....com>,
        Leo Li <sunpeng.li@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, amd-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org
Subject: [PATCH 19/30] drm/amd/display/dc/core/dc_link_dp: Mark 'result_write_min_hblank' as __maybe_unused

It looks like it could be used inside the DC_TRACE_LEVEL_MESSAGE() macro.

Fixes the following W=1 kernel build warning(s):

 drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link_dp.c: In function ‘dpcd_set_source_specific_data’:
 drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_link_dp.c:4403:18: warning: variable ‘result_write_min_hblank’ set but not used [-Wunused-but-set-variable]

Cc: Harry Wentland <harry.wentland@....com>
Cc: Leo Li <sunpeng.li@....com>
Cc: Alex Deucher <alexander.deucher@....com>
Cc: "Christian König" <christian.koenig@....com>
Cc: David Airlie <airlied@...ux.ie>
Cc: Daniel Vetter <daniel@...ll.ch>
Cc: amd-gfx@...ts.freedesktop.org
Cc: dri-devel@...ts.freedesktop.org
Signed-off-by: Lee Jones <lee.jones@...aro.org>
---
 drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
index 3c33b8fe218e5..b9e5e0eee3d24 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
@@ -4400,7 +4400,7 @@ void dp_set_fec_enable(struct dc_link *link, bool enable)
 void dpcd_set_source_specific_data(struct dc_link *link)
 {
 	if (!link->dc->vendor_signature.is_valid) {
-		enum dc_status result_write_min_hblank = DC_NOT_SUPPORTED;
+		enum dc_status __maybe_unused result_write_min_hblank = DC_NOT_SUPPORTED;
 		struct dpcd_amd_signature amd_signature;
 		amd_signature.AMD_IEEE_TxSignature_byte1 = 0x0;
 		amd_signature.AMD_IEEE_TxSignature_byte2 = 0x0;
-- 
2.25.1