linux-kernel - Re: [PATCH] fs/ntfs3: Remove unnecessary condition checking from ntfs_file_read

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Message-ID: <20210825191757.GW7722@kadam>
Date:   Wed, 25 Aug 2021 22:17:57 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Kari Argillander <kari.argillander@...il.com>
Cc:     Konstantin Komarov <almaz.alexandrovich@...agon-software.com>,
        ntfs3@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] fs/ntfs3: Remove unnecessary condition checking from
 ntfs_file_read_iter

On Wed, Aug 25, 2021 at 09:25:22PM +0300, Kari Argillander wrote:
> This check will be also performed in generic_file_read_iter() so we do
> not want to check this two times in a row.
> 
> This was founded with Smatch
> 	fs/ntfs3/file.c:803 ntfs_file_read_iter()
> 	warn: unused return: count = iov_iter_count()
> 
> Signed-off-by: Kari Argillander <kari.argillander@...il.com>
> ---
> I cc Dan also because I am happy that I finally managed to install
> Smack and straight away I found something with it. Thank you for
> this great tool.

Thanks!

You got a bit lucky, because you're using the --two-passes and the truth
is I haven't looked at that in years so I'm worried it's probably not
great.  You probably be better off not using the --two-passes option.  :/
I should remove it.

regards,
dan carpenter