linux-kernel - [PATCH][next] drm/vmwgfx: Replace one-element array with flexible-array member

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Date:   Thu, 2 Feb 2023 19:27:10 -0600
From:   "Gustavo A. R. Silva" <gustavoars@...nel.org>
To:     Zack Rusin <zackr@...are.com>,
        VMware Graphics Reviewers 
        <linux-graphics-maintainer@...are.com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        linux-hardening@...r.kernel.org
Subject: [PATCH][next] drm/vmwgfx: Replace one-element array with
 flexible-array member

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 vmw_view.

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].

This results in no differences in binary output.

Link: https://github.com/KSPP/linux/issues/79
Link: https://github.com/KSPP/linux/issues/254
Link: https://gcc.gnu.org/pipermail/gcc-patches/2022-October/602902.html [1]
Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>
---
 drivers/gpu/drm/vmwgfx/vmwgfx_so.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_so.c b/drivers/gpu/drm/vmwgfx/vmwgfx_so.c
index 4ea32b01efc0..0f696ccaddc6 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_so.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_so.c
@@ -70,7 +70,7 @@ struct vmw_view {
 	unsigned view_id;              /* Immutable */
 	u32 cmd_size;                  /* Immutable */
 	bool committed;                /* Protected by binding_mutex */
-	u32 cmd[1];                    /* Immutable */
+	u32 cmd[];		       /* Immutable */
 };
 
 static int vmw_view_create(struct vmw_resource *res);
-- 
2.34.1