Proposal patch by pipacs

lll-project (llvm-linux with clang)

BROKEN here:
...
  LD      .tmp_vmlinux1
fs/built-in.o: In function `xfs_qm_dqtobp':
fs/xfs/quota/xfs_dquot.c:(.text+0xb37a4): undefined reference to `__udivdi3'

diff --git a/fs/xfs/quota/xfs_dquot.c b/fs/xfs/quota/xfs_dquot.c
index d22aa31..fccd3d7 100644
--- a/fs/xfs/quota/xfs_dquot.c
+++ b/fs/xfs/quota/xfs_dquot.c
@@ -470,7 +470,7 @@ xfs_qm_dqtobp(
        xfs_dqid_t      id = be32_to_cpu(dqp->q_core.d_id);
        xfs_trans_t     *tp = (tpp ? *tpp : NULL);

-       dqp->q_fileoffset = (xfs_fileoff_t)id / mp->m_quotainfo->qi_dqperchunk;
+       dqp->q_fileoffset = do_div(xfs_fileoff_t)id / mp->m_quotainfo->qi_dqperchunk;

        xfs_ilock(quotip, XFS_ILOCK_SHARED);
        if (XFS_IS_THIS_QUOTA_OFF(dqp)) {