linux-kernel - [PATCH] drm/msm: mark PM functions as __maybe

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Date:   Tue, 24 Jul 2018 17:35:37 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Rob Clark <robdclark@...il.com>
Cc:     Arnd Bergmann <arnd@...db.de>, David Airlie <airlied@...ux.ie>,
        Chandan Uddaraju <chandanu@...eaurora.org>,
        Abhinav Kumar <abhinavk@...eaurora.org>,
        Sean Paul <seanpaul@...omium.org>,
        Jeykumar Sankaran <jsanka@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH] drm/msm: mark PM functions as __maybe_unused

The suspend/resume functions are not referenced when power
management is disabled:

drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c:1288:12: error: 'dpu_runtime_resume' defined but not used [-Werror=unused-function]
drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c:1261:12: error: 'dpu_runtime_suspend' defined but not used [-Werror=unused-function]

This marks them as __maybe_unused to let the compiler
drop the functions without complaining.

Fixes: 591225291ca2 ("drm/msm: Add SDM845 DPU support")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index 8d4678d29cc7..1c0838801e78 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -1258,7 +1258,7 @@ static int dpu_dev_remove(struct platform_device *pdev)
 	return 0;
 }
 
-static int dpu_runtime_suspend(struct device *dev)
+static int __maybe_unused dpu_runtime_suspend(struct device *dev)
 {
 	int rc = -1;
 	struct platform_device *pdev = to_platform_device(dev);
@@ -1285,7 +1285,7 @@ static int dpu_runtime_suspend(struct device *dev)
 	return rc;
 }
 
-static int dpu_runtime_resume(struct device *dev)
+static int __maybe_unused dpu_runtime_resume(struct device *dev)
 {
 	int rc = -1;
 	struct platform_device *pdev = to_platform_device(dev);
-- 
2.18.0