Commit 86edc94d authored by Eric Biggers's avatar Eric Biggers Committed by Jakub Kicinski
Browse files

net: use skb_crc32c() in skb_crc32c_csum_help() 



Instead of calling __skb_checksum() with a skb_checksum_ops struct that
does CRC32C, just call the new function skb_crc32c().  This is faster
and simpler.

Signed-off-by: default avatarEric Biggers <ebiggers@google.com>
Reviewed-by: default avatarHannes Reinecke <hare@suse.de>
Link: https://patch.msgid.link/20250519175012.36581-4-ebiggers@kernel.org


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent a5bd029c

net/core/dev.c

+3 −5
Original line number Diff line number Diff line
@@ -3599,7 +3599,7 @@ EXPORT_SYMBOL(skb_checksum_help); 
#ifdef CONFIG_NET_CRC32C

int skb_crc32c_csum_help(struct sk_buff *skb)

{

	__le32 crc32c_csum;

	u32 crc;

	int ret = 0, offset, start;



	if (skb->ip_summed != CHECKSUM_PARTIAL)
@@ -3627,10 +3627,8 @@ int skb_crc32c_csum_help(struct sk_buff *skb) 
	if (ret)

		goto out;



	crc32c_csum = cpu_to_le32(~__skb_checksum(skb, start,

						  skb->len - start, ~(__u32)0,

						  crc32c_csum_stub));

	*(__le32 *)(skb->data + offset) = crc32c_csum;

	crc = ~skb_crc32c(skb, start, skb->len - start, ~0);

	*(__le32 *)(skb->data + offset) = cpu_to_le32(crc);

	skb_reset_csum_not_inet(skb);

out:

	return ret;