Re: [PATCH] arm64: defconfig: Build STMMAC Ethernet driver into the kernel for NFS boot

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Hi Geert,

On 23/05/2025 12:54, Krzysztof Kozlowski wrote:
On 23/05/2025 13:39, Geert Uytterhoeven wrote:
On Tue, 6 May 2025 at 12:47, Prabhakar <prabhakar.csengg@xxxxxxxxx> wrote:
From: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>

Enable `CONFIG_STMMAC_ETH` as built-in (`y`) instead of a module (`m`) to
ensure the Ethernet driver is available early in the boot process. This
is necessary for platforms mounting the root filesystem via NFS, as the
driver must be available before the root filesystem is accessed.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
---
With this change, the Renesas RZ/V2H EVK board can boot from NFS
which has the DWMAC IP.

Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
i.e. will queue in renesas-devel for v6.17.

With my Nacked, please.


I was surprised to see this change in -next. We also use NFS for testing and we use the dwmac drivers. To date we are explictly building these drivers into the initramfs but I noticed that that is now failing because this driver is no longer a module by default. This is easy for us to fix.

I do agree that if we start to build every networking driver into the kernel it is going to bloat. Yes I do see the kernel image growing regardless of this, but nonetheless it seems better to just build as a module IMO.

Jon

--
nvpublic





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