Subject: linux-next build failure on m68k in nfs code

From: Paul Gortmaker <[email-masked]>
Date: Thu, 29 May 2014 15:40:35 -0400

Hi Trond,

I'm seeing this on today's linux-next with m68k allmodconfig:

ERROR: "__umoddi3" [fs/nfs/nfs_layout_nfsv41_files.ko] undefined!
make[1]: *** [__modpost] Error 1
make: *** [modules] Error 2

Making this obviously incorrect change makes it go away:

        /* calculate remaining bytes in the current stripe */
-       stripe_offset = ((u64)req_offset(req) - segment_offset) % stripe_unit;
+       stripe_offset = 0; // ((u64)req_offset(req) - segment_offset) % stripe_unit;

The line above comes from:

commit fa1165eda0eeaee57c292df3af1c98e10223f0f5
Author: Weston Andros Adamson <[email-masked]>
Date:   Thu May 15 11:56:56 2014 -0400

    pnfs: filelayout: support non page aligned layouts

Looks like it needs to use the proper 64bit math wrappers.

Thanks,
Paul.