path: root/arch/alpha/include
diff options
authorAlexander Duyck <>2016-03-11 14:05:34 -0800
committerDavid S. Miller <>2016-03-13 23:55:13 -0400
commit01cfbad79a5e2b835abf6a8154a341d75a6fc8cd (patch)
tree6065020f79b979c7e0a4f37489d26279c27379f6 /arch/alpha/include
parentfbd40ea0180a2d328c5adc61414dc8bab9335ce2 (diff)
ipv4: Update parameters for csum_tcpudp_magic to their original types
This patch updates all instances of csum_tcpudp_magic and csum_tcpudp_nofold to reflect the types that are usually used as the source inputs. For example the protocol field is populated based on nexthdr which is actually an unsigned 8 bit value. The length is usually populated based on skb->len which is an unsigned integer. This addresses an issue in which the IPv6 function csum_ipv6_magic was generating a checksum using the full 32b of skb->len while csum_tcpudp_magic was only using the lower 16 bits. As a result we could run into issues when attempting to adjust the checksum as there was no protocol agnostic way to update it. With this change the value is still truncated as many architectures use "(len + proto) << 8", however this truncation only occurs for values greater than 16776960 in length and as such is unlikely to occur as we stop the inner headers at ~64K in size. I did have to make a few minor changes in the arm, mn10300, nios2, and score versions of the function in order to support these changes as they were either using things such as an OR to combine the protocol and length, or were using ntohs to convert the length which would have truncated the value. I also updated a few spots in terms of whitespace and type differences for the addresses. Most of this was just to make sure all of the definitions were in sync going forward. Signed-off-by: Alexander Duyck <> Signed-off-by: David S. Miller <>
Diffstat (limited to 'arch/alpha/include')
1 files changed, 3 insertions, 6 deletions
diff --git a/arch/alpha/include/asm/checksum.h b/arch/alpha/include/asm/checksum.h
index d3854bbf0a9e..cba34b1c738c 100644
--- a/arch/alpha/include/asm/checksum.h
+++ b/arch/alpha/include/asm/checksum.h
@@ -13,14 +13,11 @@ extern __sum16 ip_fast_csum(const void *iph, unsigned int ihl);
* computes the checksum of the TCP/UDP pseudo-header
* returns a 16-bit checksum, already complemented
-extern __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr,
- unsigned short len,
- unsigned short proto,
- __wsum sum);
+__sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr,
+ __u32 len, __u8 proto, __wsum sum);
__wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
- unsigned short len, unsigned short proto,
- __wsum sum);
+ __u32 len, __u8 proto, __wsum sum);
* computes the checksum of a memory block at buff, length len,