gfs2_lblk_to_dblk   64 fs/gfs2/bmap.h extern int gfs2_lblk_to_dblk(struct inode *inode, u32 lblock, u64 *dblock);
gfs2_lblk_to_dblk  720 fs/gfs2/log.c  		int ret = gfs2_lblk_to_dblk(jd->jd_inode, lblock, &dblock);