linux-kernel - Re: [PATCH 5/6] udf: fix signedness issue

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Message-ID: <20071217163216.GI6979@atrey.karlin.mff.cuni.cz>
Date:	Mon, 17 Dec 2007 17:32:17 +0100
From:	Jan Kara <jack@...e.cz>
To:	Marcin Slusarz <marcin.slusarz@...il.com>
Cc:	linux-kernel@...r.kernel.org,
	Ben Fennema <bfennema@...con.csc.calpoly.edu>
Subject: Re: [PATCH 5/6] udf: fix signedness issue

> sparse generated:
> fs/udf/namei.c:896:15: originally declared here
> fs/udf/namei.c:1147:41: warning: incorrect type in argument 3 (different signedness)
> fs/udf/namei.c:1147:41:    expected int *offset
> fs/udf/namei.c:1147:41:    got unsigned int *<noident>
> fs/udf/namei.c:1152:78: warning: incorrect type in argument 3 (different signedness)
> fs/udf/namei.c:1152:78:    expected int *offset
> fs/udf/namei.c:1152:78:    got unsigned int *<noident>
> 
> Signed-off-by: Marcin Slusarz <marcin.slusarz@...il.com>
  I don't think this is right. udf_get_fileident() should take "unsigned
int *" as an offset, not just "int". This means changing struct
udf_fileident_bh to use unsigned int too but that is better anyway.
  And BTW the type shouldn't be uint32_t but really unsigned int in
udf_rename (int needn't have 32 bits on all archs (although I think it
has currently)).

									Honza

> ---
>  fs/udf/namei.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/fs/udf/namei.c b/fs/udf/namei.c
> index bec96a6..066153f 100644
> --- a/fs/udf/namei.c
> +++ b/fs/udf/namei.c
> @@ -1131,7 +1131,7 @@ static int udf_rename(struct inode *old_dir, struct dentry *old_dentry,
>  		}
>  	}
>  	if (S_ISDIR(old_inode->i_mode)) {
> -		uint32_t offset = udf_ext0_offset(old_inode);
> +		int offset = udf_ext0_offset(old_inode);
> 
>  		if (new_inode) {
>  			retval = -ENOTEMPTY;
> --
> 1.5.3.4
> 
> --
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-- 
Jan Kara <jack@...e.cz>
SuSE CR Labs
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