Re: [PATCH net v5 3/5] net: macb: move ring size computation to functions

Jakub Kicinski
2025-09-11T23:39:54Z

On Thu, 11 Sep 2025 11:14:52 +0200 Théo Lebrun wrote:
> > it would be good to have these functions as inline.
> > May be as a separate patch.
>
> I don't see why? Compilers are clever pieces, they'll know to inline it.
>
> If we added inline to macb_{tx,rx}_ring_size_per_queue(), should we also
> add it to macb_dma_desc_get_size()? I do not know, but my compiler
> decided to inline it as well. It might make other decisions on other
> platforms.
>
> Last point I see: those two functions are not called in the hotpath,
> only at alloc & free. If we talk about inline for the theoretical speed
> gain, then it doesn't matter in that case. If it is a code size aspect,
> then once again the compiler is more aware than myself.
>
> I don't like the tone, but it is part of the kernel doc and is on topic:
> https://www.kernel.org/doc/html/latest/process/coding-style.html#the-inline-disease

👍️ FWIW, please don't sprinkle inlines.