+ bh->b_end_io = end_buffer_write_sync;
+ if (test_bit(SDF_NOBARRIERS, &sdp->sd_flags))
+ goto skip_barrier;
+ get_bh(bh);
+ submit_bh(WRITE_BARRIER | (1 << BIO_RW_META), bh);
+ wait_on_buffer(bh);
+ if (buffer_eopnotsupp(bh)) {
+ clear_buffer_eopnotsupp(bh);
+ set_buffer_uptodate(bh);
+ set_bit(SDF_NOBARRIERS, &sdp->sd_flags);
+ lock_buffer(bh);
+skip_barrier:
+ get_bh(bh);
+ submit_bh(WRITE_SYNC | (1 << BIO_RW_META), bh);
+ wait_on_buffer(bh);
+ }
+ if (!buffer_uptodate(bh))