diff options
Diffstat (limited to 'fs/btrfs/crc32c.h')
| -rw-r--r-- | fs/btrfs/crc32c.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/fs/btrfs/crc32c.h b/fs/btrfs/crc32c.h new file mode 100644 index 000000000000..a93255b4ee27 --- /dev/null +++ b/fs/btrfs/crc32c.h @@ -0,0 +1,17 @@ +#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 |