s390/checksum: provide vector register variant of csum_partial()

Provide a faster variant of csum_partial() which uses vector registers
instead of the cksm instruction.

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

1 files changed, 1 insertions, 16 deletions

diff --git a/arch/s390/include/asm/checksum.h b/arch/s390/include/asm/checksum.h
index 414264b3ed6c..00095cc20afa 100644
--- a/arch/s390/include/asm/checksum.h
+++ b/arch/s390/include/asm/checksum.h
@@ -30,22 +30,7 @@ static inline __wsum cksm(const void *buff, int len, __wsum sum)
 	return sum;
 }
 
-/*
- * Computes the checksum of a memory block at buff, length len,
- * and adds in "sum" (32-bit).
- *
- * Returns a 32-bit number suitable for feeding into itself
- * or csum_tcpudp_magic.
- *
- * This function must be called with even lengths, except
- * for the last fragment, which may be odd.
- *
- * It's best to have buff aligned on a 32-bit boundary.
- */
-static inline __wsum csum_partial(const void *buff, int len, __wsum sum)
-{
-	return cksm(buff, len, sum);
-}
+__wsum csum_partial(const void *buff, int len, __wsum sum);
 
 /*
  * Fold a partial checksum without adding pseudo headers.