On Mon, Jan 14, 2019 at 12:32:01PM -0800, Darrick J. Wong wrote: > From: Darrick J. Wong <darrick.wong@xxxxxxxxxx> > > Fix an off-by-one error in the realtime bitmap "is used" cross-reference > helper function if the realtime extent size is a single block. > > Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx> > --- Reviewed-by: Brian Foster <bfoster@xxxxxxxxxx> > fs/xfs/scrub/rtbitmap.c | 5 ++--- > 1 file changed, 2 insertions(+), 3 deletions(-) > > diff --git a/fs/xfs/scrub/rtbitmap.c b/fs/xfs/scrub/rtbitmap.c > index 665d4bbb17cc..dbe115b075f7 100644 > --- a/fs/xfs/scrub/rtbitmap.c > +++ b/fs/xfs/scrub/rtbitmap.c > @@ -141,9 +141,8 @@ xchk_xref_is_used_rt_space( > startext = fsbno; > endext = fsbno + len - 1; > do_div(startext, sc->mp->m_sb.sb_rextsize); > - if (do_div(endext, sc->mp->m_sb.sb_rextsize)) > - endext++; > - extcount = endext - startext; > + do_div(endext, sc->mp->m_sb.sb_rextsize); > + extcount = endext - startext + 1; > xfs_ilock(sc->mp->m_rbmip, XFS_ILOCK_SHARED | XFS_ILOCK_RTBITMAP); > error = xfs_rtalloc_extent_is_free(sc->mp, sc->tp, startext, extcount, > &is_free);
