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| author | Puranjay Mohan <puranjay@kernel.org> | 2024-10-26 15:53:36 +0300 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2024-10-30 17:29:59 +0300 |
| commit | db71aae70e3e646d8ba4cb50e4bd4c281a91c804 (patch) | |
| tree | d4e420584ef738a26224803b3c1d726af5f12e25 /include | |
| parent | 0ab7cd1f18648ab50c4685553ca92e8cdc4a42da (diff) | |
| download | linux-db71aae70e3e646d8ba4cb50e4bd4c281a91c804.tar.xz | |
net: checksum: Move from32to16() to generic header
from32to16() is used by lib/checksum.c and also by
arch/parisc/lib/checksum.c. The next patch will use it in the
bpf_csum_diff helper.
Move from32to16() to the include/net/checksum.h as csum_from32to16() and
remove other implementations.
Signed-off-by: Puranjay Mohan <puranjay@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Toke Høiland-Jørgensen <toke@redhat.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20241026125339.26459-2-puranjay@kernel.org
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/checksum.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/net/checksum.h b/include/net/checksum.h index 1338cb92c8e7..243f972267b8 100644 --- a/include/net/checksum.h +++ b/include/net/checksum.h @@ -151,6 +151,12 @@ static inline void csum_replace(__wsum *csum, __wsum old, __wsum new) *csum = csum_add(csum_sub(*csum, old), new); } +static inline unsigned short csum_from32to16(unsigned int sum) +{ + sum += (sum >> 16) | (sum << 16); + return (unsigned short)(sum >> 16); +} + struct sk_buff; void inet_proto_csum_replace4(__sum16 *sum, struct sk_buff *skb, __be32 from, __be32 to, bool pseudohdr); |