linux-kernel - [PATCH] [next] drm/amdgpu: Replace remaining 1-element array with flex-array

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Message-ID: <Y3soBt1jmXHUKhW9@mail.google.com>
Date:   Mon, 21 Nov 2022 20:25:58 +1300
From:   Paulo Miguel Almeida <paulo.miguel.almeida.rodenas@...il.com>
To:     Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        "Pan, Xinhui" <Xinhui.Pan@....com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Paulo Miguel Almeida <paulo.miguel.almeida.rodenas@...il.com>,
        Rongguang Wei <weirongguang@...inos.cn>,
        Slark Xiao <slark_xiao@....com>, amd-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org
Cc:     linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org,
        paulo.miguel.almeida.rodenas@...il.com
Subject: [PATCH] [next] drm/amdgpu: Replace remaining 1-element array with
 flex-array

One-element arrays are deprecated, and we are replacing them with
flexible array members instead. So, replace one-element array with
flexible-array member in struct GOP_VBIOS_CONTENT and refactor the
rest of the code accordingly.

Important to mention is that doing a build before/after this patch
results in no functional binary output differences.

This helps with the ongoing efforts to tighten the FORTIFY_SOURCE
routines on memcpy() and help us make progress towards globally
enabling -fstrict-flex-arrays=3 [1].

Link: https://github.com/KSPP/linux/issues/79
Link: https://github.com/KSPP/linux/issues/238
Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101836 [1]

Signed-off-by: Paulo Miguel Almeida <paulo.miguel.almeida.rodenas@...il.com>
---
This should be the last one-element array that had references in source
code. Given the way it was used, no *.c code change was required.

I will move on to the atombios.h in the radeon driver.
---
 drivers/gpu/drm/amd/include/atombios.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/include/atombios.h b/drivers/gpu/drm/amd/include/atombios.h
index 4dc738c51771..b78360a71bc9 100644
--- a/drivers/gpu/drm/amd/include/atombios.h
+++ b/drivers/gpu/drm/amd/include/atombios.h
@@ -9292,7 +9292,7 @@ typedef struct {
 
 typedef struct {
   VFCT_IMAGE_HEADER   VbiosHeader;
-  UCHAR   VbiosContent[1];
+  UCHAR   VbiosContent[];
 }GOP_VBIOS_CONTENT;
 
 typedef struct {
-- 
2.37.3