LFS_NRESERVE
if (lfs_fsbtob(fs, LFS_NRESERVE(fs)) > LFS_MAX_BYTES && !ronly) {
lfs_fsbtob(fs, LFS_NRESERVE(fs))) >> PAGE_SHIFT)));
if ((error = lfs_reserve(fs, dvp, vp, LFS_NRESERVE(fs))) != 0)
lfs_reserve(fs, dvp, vp, -LFS_NRESERVE(fs));
lfs_reserve(fs, dvp, NULL, -LFS_NRESERVE(fs));