Re: [PATCH] cacheflush.h: Add forward declaration for struct folio

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On Wed, Mar 23, 2022 at 03:35:10PM +1200, Herbert Xu wrote:
> This should be fixed in cacheflush.h:
> 
> ---8<---
> The struct folio is not declared in cacheflush.h so we need to
> provide a forward declaration as otherwise users of this header
> file may get warnings.
> 
> Reported-by: Guenter Roeck <linux@xxxxxxxxxxxx>
> Fixes: 522a0032af00 ("Add linux/cacheflush.h")
> Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>

Reviewed-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>

> diff --git a/include/linux/cacheflush.h b/include/linux/cacheflush.h
> index fef8b607f97e..a6189d21f2ba 100644
> --- a/include/linux/cacheflush.h
> +++ b/include/linux/cacheflush.h
> @@ -4,6 +4,8 @@
>  
>  #include <asm/cacheflush.h>
>  
> +struct folio;
> +
>  #if ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE
>  #ifndef ARCH_IMPLEMENTS_FLUSH_DCACHE_FOLIO
>  void flush_dcache_folio(struct folio *folio);
> -- 
> Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
> Home Page: http://gondor.apana.org.au/~herbert/
> PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt



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