Re: [PATCH] nios2: fix __wsum type degradation in csum_fold()

[Keith Busch]

On Tue, Sep 22, 2026 at 08:34:16AM -0700, Keith Busch wrote:
> From: Keith Busch <kbusch@xxxxxxxxxx>
> 
> csum_fold() shifts a bitwise __wsum type, which sparse reports as
> "restricted __wsum degrades to integer". Sparse only checks the body of
> a static inline once something instantiates it, so this went unnoticed
> until a recent block layer change added the first csum_fold() caller to
> a file built on this architecture.
> 
> Force cast to a __u32 for the shift, as the other architectures do.

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