[PATCH net-next 03/10] net: use skb_crc32c() in skb_crc32c_csum_help()
From: Eric Biggers <ebiggers@kernel.org>
Date: 2025-05-11 00:41:32
Also in:
linux-nvme, linux-rdma, linux-sctp, lkml
Subsystem:
networking [general], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Eric Biggers <redacted> 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: Eric Biggers <redacted> --- net/core/dev.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/net/core/dev.c b/net/core/dev.c
index 51606b2d17bb..1eda2501f07b 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c@@ -3595,11 +3595,11 @@ int skb_checksum_help(struct sk_buff *skb) 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) goto out;
@@ -3623,14 +3623,12 @@ int skb_crc32c_csum_help(struct sk_buff *skb) ret = skb_ensure_writable(skb, offset + sizeof(__le32)); 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; } EXPORT_SYMBOL(skb_crc32c_csum_help);
--
2.49.0