linux-kernel - Re: [PATCH] mm/filemap: Remove redundant variable's assignment

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Date:   Mon, 25 Jan 2021 15:22:37 -0800
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Baolin Wang <baolin.wang@...ux.alibaba.com>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm/filemap: Remove redundant variable's assignment

On Mon, 25 Jan 2021 11:20:02 +0800 Baolin Wang <baolin.wang@...ux.alibaba.com> wrote:

> We've already set the variable 'i' 's initial value before using it,
> thus remove redundant previous assignment of variable 'i'.
> 
> ...
>
> --- a/mm/filemap.c
> +++ b/mm/filemap.c
> @@ -2472,7 +2472,6 @@ ssize_t generic_file_buffered_read(struct kiocb *iocb,
>  		if ((iocb->ki_flags & IOCB_WAITQ) && written)
>  			iocb->ki_flags |= IOCB_NOWAIT;
>  
> -		i = 0;
>  		pg_nr = generic_file_buffered_read_get_pages(iocb, iter,
>  							     pages, nr_pages);
>  		if (pg_nr < 0) {

Matthew's patch series "Refactor generic_file_buffered_read "
(https://lkml.kernel.org/r/20210122160140.223228-1-willy@infradead.org)
changes all this code - I dont think the patch is relevant after that,
so I'll skip it.