linux-kernel - [PATCH] drm/r128: fix compilation errors caused by `-fsanitize=shift`

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Date:   Tue, 17 May 2022 21:24:32 +0000
From:   "GONG, Ruiqi" <gongruiqi1@...wei.com>
To:     David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>
CC:     <dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>,
        "Wang Weiyang" <wangweiyang2@...wei.com>,
        Xiu Jianfeng <xiujianfeng@...wei.com>, <gongruiqi1@...wei.com>
Subject: [PATCH] drm/r128: fix compilation errors caused by `-fsanitize=shift`

Fix the following compilation errors that are produced by building
recent mainline code on arm64 with `allmodconfig`:

  drivers/gpu/drm/r128/r128_cce.c:417:2: error: case label does not reduce to an integer constant
    case R128_PM4_64BM_64VCBM_64INDBM:
    ^~~~
  drivers/gpu/drm/r128/r128_cce.c:418:2: error: case label does not reduce to an integer constant
    case R128_PM4_64PIO_64VCPIO_64INDPIO:
    ^~~~

These errors are induced by `-fsanitize=shift`.

Signed-off-by: GONG, Ruiqi <gongruiqi1@...wei.com>
---
 drivers/gpu/drm/r128/r128_drv.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/r128/r128_drv.h b/drivers/gpu/drm/r128/r128_drv.h
index 2e1bc01aa5c9..991c27a2b328 100644
--- a/drivers/gpu/drm/r128/r128_drv.h
+++ b/drivers/gpu/drm/r128/r128_drv.h
@@ -300,8 +300,8 @@ extern long r128_compat_ioctl(struct file *filp, unsigned int cmd,
 #	define R128_PM4_64PIO_128INDBM		(5  << 28)
 #	define R128_PM4_64BM_128INDBM		(6  << 28)
 #	define R128_PM4_64PIO_64VCBM_64INDBM	(7  << 28)
-#	define R128_PM4_64BM_64VCBM_64INDBM	(8  << 28)
-#	define R128_PM4_64PIO_64VCPIO_64INDPIO	(15 << 28)
+#	define R128_PM4_64BM_64VCBM_64INDBM	(8u  << 28)
+#	define R128_PM4_64PIO_64VCPIO_64INDPIO	(15u << 28)
 #	define R128_PM4_BUFFER_CNTL_NOUPDATE	(1  << 27)
 
 #define R128_PM4_BUFFER_WM_CNTL		0x0708
-- 
2.17.1