[GFS2] Get superblock a different way
The mapping may be NULL by the time the I/O has completed, so we now get the superblock by a different route (via the bd and glock) to avoid this problem. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com> Cc: Wendy Cheng <wcheng@redhat.com>
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@ -513,7 +513,8 @@ struct buffer_head *gfs2_log_get_buf(struct gfs2_sbd *sdp)
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static void gfs2_fake_write_endio(struct buffer_head *bh, int uptodate)
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{
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struct buffer_head *real_bh = bh->b_private;
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struct gfs2_sbd *sdp = GFS2_SB(real_bh->b_page->mapping->host);
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struct gfs2_bufdata *bd = real_bh->b_private;
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struct gfs2_sbd *sdp = bd->bd_gl->gl_sbd;
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end_buffer_write_sync(bh, uptodate);
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free_buffer_head(bh);
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