From mboxrd@z Thu Jan  1 00:00:00 1970
From: Claude Code Review Bot <claude-review@example.com>
To: dri-devel-reviews@example.com
Subject: Claude review: nouveau/vmm: use kzalloc_flex
Date: Fri, 13 Mar 2026 13:50:17 +1000
Message-ID: <review-patch1-20260312195529.13002-1-rosenp@gmail.com>
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References: <20260312195529.13002-1-rosenp@gmail.com> <20260312195529.13002-1-rosenp@gmail.com>
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Patch Review

**Correctness: OK**

The original code:
```c
if (!(pgt =3D kzalloc(sizeof(*pgt) + (sizeof(pgt->pte[0]) * lpte), GFP_KERN=
EL)))
```

is replaced with:
```c
if (!(pgt =3D kzalloc_flex(*pgt, pte, lpte)))
```

This is correct because:

1. `struct nvkm_vmm_pt` (defined in `vmm.h:18`) has a flexible array member=
 `union nvkm_pte_tracker pte[]` at `vmm.h:58`, and the macro's `FAM` argume=
nt is `pte` =E2=80=94 matching correctly.
2. `kzalloc_flex` expands to `__alloc_flex(kzalloc, default_gfp(), typeof(*=
pgt), pte, lpte)`, which uses `struct_size_t()` internally to compute the s=
ame `sizeof(*pgt) + sizeof(pgt->pte[0]) * lpte` size.
3. `default_gfp()` with no extra arguments resolves to `GFP_KERNEL` (via `i=
nclude/linux/gfp.h:18`), matching the original explicit `GFP_KERNEL`.
4. The `__alloc_flex` macro at `slab.h:990` also handles `__counted_by()` a=
nnotation tracking if present, which is a bonus.

**Minor nit on commit message:** The commit message says "Use the proper ma=
cro do to these sizeof calculations" =E2=80=94 there's a typo: "do to" shou=
ld be "to do". Very minor, but worth fixing before applying.

**Verdict:** The patch is correct and a clean mechanical conversion. Recomm=
end applying with the typo fix in the commit message.

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