linux-kernel - [PATCH AUTOSEL 4.9 080/141] drm/gma500: remove set but not used variables 'hist

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Date:   Fri, 14 Feb 2020 11:20:20 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Chen Zhou <chenzhou10@...wei.com>, Hulk Robot <hulkci@...wei.com>,
        Patrik Jakobsson <patrik.r.jakobsson@...il.com>,
        Sasha Levin <sashal@...nel.org>,
        dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 4.9 080/141] drm/gma500: remove set but not used variables 'hist_reg'

From: Chen Zhou <chenzhou10@...wei.com>

[ Upstream commit 72f775611daf3ce20358388facbaf11f22899fa2 ]

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/gpu/drm/gma500/psb_irq.c: In function psb_irq_turn_off_dpst:
drivers/gpu/drm/gma500/psb_irq.c:473:6:
	warning: variable hist_reg set but not used [-Wunused-but-set-variable]

Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Chen Zhou <chenzhou10@...wei.com>
Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@...il.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191227114811.14907-1-chenzhou10@huawei.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/gma500/psb_irq.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/gma500/psb_irq.c b/drivers/gpu/drm/gma500/psb_irq.c
index f75f199c84311..518d7b4456bf1 100644
--- a/drivers/gpu/drm/gma500/psb_irq.c
+++ b/drivers/gpu/drm/gma500/psb_irq.c
@@ -471,12 +471,11 @@ void psb_irq_turn_off_dpst(struct drm_device *dev)
 {
 	struct drm_psb_private *dev_priv =
 	    (struct drm_psb_private *) dev->dev_private;
-	u32 hist_reg;
 	u32 pwm_reg;
 
 	if (gma_power_begin(dev, false)) {
 		PSB_WVDC32(0x00000000, HISTOGRAM_INT_CONTROL);
-		hist_reg = PSB_RVDC32(HISTOGRAM_INT_CONTROL);
+		PSB_RVDC32(HISTOGRAM_INT_CONTROL);
 
 		psb_disable_pipestat(dev_priv, 0, PIPE_DPST_EVENT_ENABLE);
 
-- 
2.20.1