sctp: Clean up sctp checksumming code

The sctp crc32c checksum is always generated in little endian.
So, we clean up the code to treat it as little endian and remove
all the __force casts.

Suggested by Herbert Xu.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 8 insertions, 8 deletions

diff --git a/include/linux/sctp.h b/include/linux/sctp.h
index bd50b371ffaa..c2731bfe04d8 100644
--- a/include/linux/sctp.h
+++ b/include/linux/sctp.h
@@ -60,7 +60,7 @@ typedef struct sctphdr {
         __be16 source;
         __be16 dest;
         __be32 vtag;
-        __be32 checksum;
+        __le32 checksum;
 } __attribute__((packed)) sctp_sctphdr_t;
 
 #ifdef __KERNEL__
diff --git a/include/net/sctp/checksum.h b/include/net/sctp/checksum.h
index 2fec3c366e81..befc8d2a1b9f 100644
--- a/include/net/sctp/checksum.h
+++ b/include/net/sctp/checksum.h
@@ -46,14 +46,14 @@
 #include <net/sctp/sctp.h>
 #include <linux/crc32c.h>
 
-static inline __be32 sctp_crc32c(__be32 crc, u8 *buffer, u16 length)
+static inline __u32 sctp_crc32c(__u32 crc, u8 *buffer, u16 length)
 {
-        return (__force __be32)crc32c((__force u32)crc, buffer, length);
+        return crc32c(crc, buffer, length);
 }
 
-static inline __be32 sctp_start_cksum(__u8 *buffer, __u16 length)
+static inline __u32 sctp_start_cksum(__u8 *buffer, __u16 length)
 {
-        __be32 crc = ~cpu_to_be32(0);
+        __u32 crc = ~(__u32)0;
         __u8  zero[sizeof(__u32)] = {0};
 
         /* Optimize this routine to be SCTP specific, knowing how
@@ -72,12 +72,12 @@ static inline __be32 sctp_start_cksum(__u8 *buffer, __u16 length)
         return crc;
 }
 
-static inline __be32 sctp_update_cksum(__u8 *buffer, __u16 length, __be32 crc32)
+static inline __u32 sctp_update_cksum(__u8 *buffer, __u16 length, __u32 crc32)
 {
         return sctp_crc32c(crc32, buffer, length);
 }
 
-static inline __be32 sctp_end_cksum(__be32 crc32)
+static inline __le32 sctp_end_cksum(__be32 crc32)
 {
-        return (__force __be32)~cpu_to_le32((__force u32)crc32);
+        return cpu_to_le32(~crc32);
 }