Heiko Carstens dcd3e1de9d s390/checksum: provide csum_partial_copy_nocheck() ...

With csum_partial(), which reads all bytes into registers it is easy to
also implement csum_partial_copy_nocheck() which copies the buffer while
calculating its checksum.

For a 512 byte buffer this reduces the runtime by 19%. Compared to the old
generic variant (memcpy() + cksm instruction) runtime is reduced by 42%).

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

2024-02-16 14:30:17 +01:00

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