Re: [PATCH] filemap: Return the error in do_read_cache_page()

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On Wed, May 22, 2024 at 04:31:14PM -0400, trondmy@xxxxxxxxxx wrote:
> From: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
> 
> If the call to do_read_cache_folio() returns an error, then we should
> pass that back to the caller of do_read_cache_page().

this patch is a no-op.  it generates exactly the same code.
only now it doesn't have the '&folio->page' signature that lets everyone
know it's part of the compat code.

> Fixes: 539a3322f208 ("filemap: Add read_cache_folio and read_mapping_folio")
> Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
> ---
>  mm/filemap.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/mm/filemap.c b/mm/filemap.c
> index 30de18c4fd28..8f3b3604f73b 100644
> --- a/mm/filemap.c
> +++ b/mm/filemap.c
> @@ -3812,7 +3812,7 @@ static struct page *do_read_cache_page(struct address_space *mapping,
>  
>  	folio = do_read_cache_folio(mapping, index, filler, file, gfp);
>  	if (IS_ERR(folio))
> -		return &folio->page;
> +		return ERR_CAST(folio);
>  	return folio_file_page(folio, index);
>  }
>  
> -- 
> 2.45.1
> 




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