int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks);
void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks);
void gfs2_log_incr_head(struct gfs2_sbd *sdp);
int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks);
void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks);
void gfs2_log_incr_head(struct gfs2_sbd *sdp);