[PATCH v6 11/13] iov_iter, net: Fold in csum_and_memcpy()

From: David Howells
Date: Fri Sep 22 2023 - 08:04:58 EST


Fold csum_and_memcpy() in to its callers.

Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
cc: Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>
cc: Jens Axboe <axboe@xxxxxxxxx>
cc: Christoph Hellwig <hch@xxxxxx>
cc: Christian Brauner <christian@xxxxxxxxxx>
cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
cc: David Laight <David.Laight@xxxxxxxxxx>
cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
cc: Eric Dumazet <edumazet@xxxxxxxxxx>
cc: Jakub Kicinski <kuba@xxxxxxxxxx>
cc: Paolo Abeni <pabeni@xxxxxxxxxx>
cc: linux-block@xxxxxxxxxxxxxxx
cc: linux-fsdevel@xxxxxxxxxxxxxxx
cc: linux-mm@xxxxxxxxx
cc: netdev@xxxxxxxxxxxxxxx
---
include/linux/skbuff.h | 7 -------
net/core/datagram.c | 3 ++-
net/core/skbuff.c | 3 ++-
3 files changed, 4 insertions(+), 9 deletions(-)

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index d0656cc11c16..c81ef5d76953 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -3679,13 +3679,6 @@ static inline int __must_check skb_put_padto(struct sk_buff *skb, unsigned int l
return __skb_put_padto(skb, len, true);
}

-static inline __wsum csum_and_memcpy(void *to, const void *from, size_t len,
- __wsum sum, size_t off)
-{
- __wsum next = csum_partial_copy_nocheck(from, to, len);
- return csum_block_add(sum, next, off);
-}
-
struct csum_state {
__wsum csum;
size_t off;
diff --git a/net/core/datagram.c b/net/core/datagram.c
index 37c89d0933b7..452620dd41e4 100644
--- a/net/core/datagram.c
+++ b/net/core/datagram.c
@@ -732,8 +732,9 @@ size_t memcpy_to_iter_csum(void *iter_to, size_t progress,
size_t len, void *from, void *priv2)
{
__wsum *csum = priv2;
+ __wsum next = csum_partial_copy_nocheck(from, iter_to, len);

- *csum = csum_and_memcpy(iter_to, from + progress, len, *csum, progress);
+ *csum = csum_block_add(*csum, next, progress);
return 0;
}

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 5dbdfce2d05f..3efed86321db 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -6938,8 +6938,9 @@ size_t memcpy_from_iter_csum(void *iter_from, size_t progress,
size_t len, void *to, void *priv2)
{
__wsum *csum = priv2;
+ __wsum next = csum_partial_copy_nocheck(iter_from, to + progress, len);

- *csum = csum_and_memcpy(to + progress, iter_from, len, *csum, progress);
+ *csum = csum_block_add(*csum, next, progress);
return 0;
}