From: Dave Chinner <david@fromorbit.com>
To: Mark Tinguely <tinguely@sgi.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>,
XFS Filesystem <xfs@oss.sgi.com>
Subject: Re: [PATCH] xfs: fix 32bit __divdi3 undefined
Date: Thu, 17 Apr 2014 08:10:00 +1000 [thread overview]
Message-ID: <20140416221000.GO15995@dastard> (raw)
In-Reply-To: <20140416215223.512644029@sgi.com>
On Wed, Apr 16, 2014 at 04:51:56PM -0500, Mark Tinguely wrote:
> The roundup in commit 68c1fb5d should be a roundup_64()
> because it is desired to round a 64 bit type by an integer
> and that will result in a 64 bit value. On 32 bit machines
> using roundup() in this case will result in the error:
>
> ERROR: "__divdi3" [fs/xfs/xfs.ko] undefined!
>
> Reported-by: Paul Gortmaker <paul.gortmaker@windriver.com>
> Tested-by: Paul Gortmaker <paul.gortmaker@windriver.com>
> Signed-off-by: Mark Tinguely <tinguely@sgi.com>
> ---
> fs/xfs/xfs_aops.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> Index: b/fs/xfs/xfs_aops.c
> ===================================================================
> --- a/fs/xfs/xfs_aops.c
> +++ b/fs/xfs/xfs_aops.c
> @@ -1365,7 +1365,7 @@ __xfs_get_blocks(
> if (offset < i_size_read(inode) &&
> offset + mapping_size >= i_size_read(inode)) {
> /* limit mapping to block that spans EOF */
> - mapping_size = roundup(i_size_read(inode) - offset,
> + mapping_size = roundup_64(i_size_read(inode) - offset,
> 1 << inode->i_blkbits);
> }
> if (mapping_size > LONG_MAX)
I'm not going to apply this as a patch - I'm going to rebase the
branch with the fix in the original patch so we don't have a bisect
breakage in the branch. Don't worry, I'll add the fact you fixed the
bug into the commit message...
Cheers,
Dave.
--
Dave Chinner
david@fromorbit.com
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next prev parent reply other threads:[~2014-04-16 22:10 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-16 16:09 new 64 bit math link fail in xfs in linux-next today Paul Gortmaker
2014-04-16 20:59 ` Mark Tinguely
2014-04-16 21:45 ` Paul Gortmaker
2014-04-16 21:51 ` [PATCH] xfs: fix 32bit __divdi3 undefined Mark Tinguely
2014-04-16 21:57 ` Eric Sandeen
2014-04-16 22:10 ` Dave Chinner [this message]
2014-04-16 22:30 ` Mark Tinguely
2014-04-16 21:57 ` new 64 bit math link fail in xfs in linux-next today Dave Chinner
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