linux-kernel - [PATCH 3/3] drm/fbdev-generic: optimize out a redundant assignment clause

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Message-Id: <20230330084911.1565071-3-15330273260@189.cn>
Date:   Thu, 30 Mar 2023 16:49:11 +0800
From:   Sui Jingfeng <15330273260@....cn>
To:     Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        suijingfeng <suijingfeng@...ngson.cn>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        Christian Koenig <christian.koenig@....com>
Cc:     nathan@...nel.org, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, linux-media@...r.kernel.org,
        linaro-mm-sig@...ts.linaro.org, loongson-kernel@...ts.loongnix.cn
Subject: [PATCH 3/3] drm/fbdev-generic: optimize out a redundant assignment clause

From: Sui Jingfeng <suijingfeng@...ngson.cn>

 The assignment already done in drm_client_buffer_vmap(), this patch save
 a copy. No functional change.

Signed-off-by: Sui Jingfeng <suijingfeng@...ngson.cn>
---
 drivers/gpu/drm/drm_fbdev_generic.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/drm_fbdev_generic.c b/drivers/gpu/drm/drm_fbdev_generic.c
index 8e5148bf40bb..be4522268927 100644
--- a/drivers/gpu/drm/drm_fbdev_generic.c
+++ b/drivers/gpu/drm/drm_fbdev_generic.c
@@ -183,7 +183,7 @@ static int drm_fbdev_generic_damage_blit(struct drm_fb_helper *fb_helper,
 					 struct drm_clip_rect *clip)
 {
 	struct drm_client_buffer *buffer = fb_helper->buffer;
-	struct iosys_map map, dst;
+	struct iosys_map map;
 	int ret;
 
 	/*
@@ -203,8 +203,7 @@ static int drm_fbdev_generic_damage_blit(struct drm_fb_helper *fb_helper,
 	if (ret)
 		goto out;
 
-	dst = map;
-	drm_fbdev_generic_damage_blit_real(fb_helper, clip, &dst);
+	drm_fbdev_generic_damage_blit_real(fb_helper, clip, &map);
 
 	drm_client_buffer_vunmap(buffer);
 
-- 
2.25.1