linux-kernel - [PATCH -next] drm/nouveau/disp: fix cast removes address space of expression warnings

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Message-ID: <20220924092516.10007-1-ruanjinjie@huawei.com>
Date:   Sat, 24 Sep 2022 17:25:16 +0800
From:   ruanjinjie <ruanjinjie@...wei.com>
To:     <bskeggs@...hat.com>, <kherbst@...hat.com>, <lyude@...hat.com>,
        <airlied@...ux.ie>, <linux-kernel@...r.kernel.org>,
        <daniel@...ll.ch>, <jani.nikula@...el.com>, <airlied@...hat.com>,
        <tzimmermann@...e.de>, <hverkuil-cisco@...all.nl>,
        <greenfoo@....eu>, <seanpaul@...omium.org>,
        <dri-devel@...ts.freedesktop.org>, <nouveau@...ts.freedesktop.org>
CC:     <ruanjinjie@...wei.com>
Subject: [PATCH -next] drm/nouveau/disp: fix cast removes address space of expression warnings

When build Linux kernel with 'make C=2', encounter the following warnings:

./drivers/gpu/drm/nouveau/dispnv50/disp.c:134:34: warning: cast removes address space '__iomem' of expression
./drivers/gpu/drm/nouveau/dispnv50/disp.c:197:34: warning: cast removes address space '__iomem' of expression

The data type of dmac->_push.mem.object.map.ptr is 'void __iomem *', but
converted to 'u32 *' directly and cause above warnings, now
recover their data types to fix these warnings.

Signed-off-by: ruanjinjie <ruanjinjie@...wei.com>
---
 drivers/gpu/drm/nouveau/dispnv50/disp.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c
index 33c97d510999..aa94f8e284dd 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
@@ -131,7 +131,7 @@ nv50_dmac_kick(struct nvif_push *push)
 {
 	struct nv50_dmac *dmac = container_of(push, typeof(*dmac), _push);
 
-	dmac->cur = push->cur - (u32 *)dmac->_push.mem.object.map.ptr;
+	dmac->cur = push->cur - (u32 __iomem *)dmac->_push.mem.object.map.ptr;
 	if (dmac->put != dmac->cur) {
 		/* Push buffer fetches are not coherent with BAR1, we need to ensure
 		 * writes have been flushed right through to VRAM before writing PUT.
@@ -194,7 +194,7 @@ nv50_dmac_wait(struct nvif_push *push, u32 size)
 	if (WARN_ON(size > dmac->max))
 		return -EINVAL;
 
-	dmac->cur = push->cur - (u32 *)dmac->_push.mem.object.map.ptr;
+	dmac->cur = push->cur - (u32 __iomem *)dmac->_push.mem.object.map.ptr;
 	if (dmac->cur + size >= dmac->max) {
 		int ret = nv50_dmac_wind(dmac);
 		if (ret)
-- 
2.25.1