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Message-Id: <20220621203921.3594920-1-cmllamas@google.com>
Date: Tue, 21 Jun 2022 20:39:21 +0000
From: Carlos Llamas <cmllamas@...gle.com>
To: amd-gfx@...ts.freedesktop.org
Cc: Masahiro Yamada <masahiroy@...nel.org>,
Carlos Llamas <cmllamas@...gle.com>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>,
Thomas Zimmermann <tzimmermann@...e.de>,
David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>,
Alex Deucher <alexander.deucher@....com>,
Bas Nieuwenhuizen <bas@...nieuwenhuizen.nl>,
dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH] drm/fourcc: fix integer type usage in uapi header
Kernel uapi headers are supposed to use __[us]{8,16,32,64} types defined
by <linux/types.h> as opposed to 'uint32_t' and similar. See [1] for the
relevant discussion about this topic. In this particular case, the usage
of 'uint64_t' escaped headers_check as these macros are not being called
here. However, the following program triggers a compilation error:
#include <drm/drm_fourcc.h>
int main()
{
unsigned long x = AMD_FMT_MOD_CLEAR(RB);
return 0;
}
gcc error:
drm.c:5:27: error: ‘uint64_t’ undeclared (first use in this function)
5 | unsigned long x = AMD_FMT_MOD_CLEAR(RB);
| ^~~~~~~~~~~~~~~~~
This patch changes AMD_FMT_MOD_{SET,CLEAR} macros to use the correct
integer types, which fixes the above issue.
[1] https://lkml.org/lkml/2019/6/5/18
Fixes: 8ba16d599374 ("drm/fourcc: Add AMD DRM modifiers.")
Signed-off-by: Carlos Llamas <cmllamas@...gle.com>
---
include/uapi/drm/drm_fourcc.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
index f1972154a594..0980678d502d 100644
--- a/include/uapi/drm/drm_fourcc.h
+++ b/include/uapi/drm/drm_fourcc.h
@@ -1444,11 +1444,11 @@ drm_fourcc_canonicalize_nvidia_format_mod(__u64 modifier)
#define AMD_FMT_MOD_PIPE_MASK 0x7
#define AMD_FMT_MOD_SET(field, value) \
- ((uint64_t)(value) << AMD_FMT_MOD_##field##_SHIFT)
+ ((__u64)(value) << AMD_FMT_MOD_##field##_SHIFT)
#define AMD_FMT_MOD_GET(field, value) \
(((value) >> AMD_FMT_MOD_##field##_SHIFT) & AMD_FMT_MOD_##field##_MASK)
#define AMD_FMT_MOD_CLEAR(field) \
- (~((uint64_t)AMD_FMT_MOD_##field##_MASK << AMD_FMT_MOD_##field##_SHIFT))
+ (~((__u64)AMD_FMT_MOD_##field##_MASK << AMD_FMT_MOD_##field##_SHIFT))
#if defined(__cplusplus)
}
--
2.37.0.rc0.104.g0611611a94-goog
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