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- #include <asm/byteorder.h>
- #include <linux/crc32c.h>
- #include <linux/version.h>
- /**
- * implementation of crc32c_le() changed in linux-2.6.23,
- * has of v0.13 btrfs-progs is using the latest version.
- * We must workaround older implementations of crc32c_le()
- * found on older kernel versions.
- */
- #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,23)
- #define btrfs_crc32c(seed, data, length) \
- __cpu_to_le32( crc32c( __le32_to_cpu(seed), data, length) )
- #else
- #define btrfs_crc32c(seed, data, length) \
- crc32c(seed, data, length)
- #endif
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