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    Subject[PATCH 3.16 102/132] GFS2: Fix rgrp end rounding problem for bsize < page size
    3.16.74-rc1 review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Bob Peterson <rpeterso@redhat.com>

    commit 31dddd9eb9ebae9a2a9b502750e9e481d752180a upstream.

    This patch fixes a bug introduced by commit 7005c3e. That patch
    tries to map a vm range for resource groups, but the calculation
    breaks down when the block size is less than the page size.

    Signed-off-by: Bob Peterson <rpeterso@redhat.com>
    Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
    ---
    fs/gfs2/rgrp.c | 5 +++--
    1 file changed, 3 insertions(+), 2 deletions(-)

    --- a/fs/gfs2/rgrp.c
    +++ b/fs/gfs2/rgrp.c
    @@ -926,8 +926,9 @@ static int read_rindex_entry(struct gfs2
    goto fail;

    rgd->rd_gl->gl_object = rgd;
    - rgd->rd_gl->gl_vm.start = rgd->rd_addr * bsize;
    - rgd->rd_gl->gl_vm.end = rgd->rd_gl->gl_vm.start + (rgd->rd_length * bsize) - 1;
    + rgd->rd_gl->gl_vm.start = (rgd->rd_addr * bsize) & PAGE_CACHE_MASK;
    + rgd->rd_gl->gl_vm.end = PAGE_CACHE_ALIGN((rgd->rd_addr +
    + rgd->rd_length) * bsize) - 1;
    rgd->rd_rgl = (struct gfs2_rgrp_lvb *)rgd->rd_gl->gl_lksb.sb_lvbptr;
    rgd->rd_flags &= ~GFS2_RDF_UPTODATE;
    if (rgd->rd_data > sdp->sd_max_rg_data)
    \
     
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