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drm/nouveau: fifo: Avoid -Wflex-array-member-not-at-end warning

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-Wflex-array-member-not-at-end was introduced in GCC-14, and we are
getting ready to enable it, globally.

Use the new TRAILING_OVERLAP() helper to fix the following warning:

drivers/gpu/drm/nouveau/nvif/fifo.c:29:42: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]

This helper creates a union between a flexible-array member (FAM)
and a set of members that would otherwise follow it. This overlays
the trailing members onto the FAM while preserving the original
memory layout.

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Justin Stitt <justinstitt@google.com>
Acked-by: Danilo Krummrich <dakr@kernel.org>
Link: https://patch.msgid.link/aJ17oxJYcqqr3946@kspp
Signed-off-by: Kees Cook <kees@kernel.org>
This commit is contained in:
Gustavo A. R. Silva
2025-08-14 15:01:07 +09:00
committed by Kees Cook
parent 9448598b22
commit 06190e1c86
1 changed files with 2 additions and 3 deletions
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5
drivers/gpu/drm/nouveau/nvif/fifo.c
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@@ -25,13 +25,12 @@ static int
nvif_fifo_runlists(struct nvif_device *device)
{
struct nvif_object *object = &device->object;
struct {
struct nv_device_info_v1 m;
TRAILING_OVERLAP(struct nv_device_info_v1, m, data,
struct {
struct nv_device_info_v1_data runlists;
struct nv_device_info_v1_data runlist[64];
} v;
} *a;
) *a;
int ret, i;
if (device->runlist)