high_crc 443 fs/btrfs/extent-tree.c u32 high_crc = ~(u32)0; high_crc 448 fs/btrfs/extent-tree.c high_crc = btrfs_crc32c(high_crc, &lenum, sizeof(lenum)); high_crc 454 fs/btrfs/extent-tree.c return ((u64)high_crc << 31) ^ (u64)low_crc;