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-rw-r--r--lib/checksum.c14
1 files changed, 8 insertions, 6 deletions
diff --git a/lib/checksum.c b/lib/checksum.c
index b2e2fd46846..097508732f3 100644
--- a/lib/checksum.c
+++ b/lib/checksum.c
@@ -37,7 +37,8 @@
#include <asm/byteorder.h>
-static inline unsigned short from32to16(unsigned long x)
+#ifndef do_csum
+static inline unsigned short from32to16(unsigned int x)
{
/* add up 16-bit and 16-bit for 16+c bit */
x = (x & 0xffff) + (x >> 16);
@@ -49,16 +50,16 @@ static inline unsigned short from32to16(unsigned long x)
static unsigned int do_csum(const unsigned char *buff, int len)
{
int odd, count;
- unsigned long result = 0;
+ unsigned int result = 0;
if (len <= 0)
goto out;
odd = 1 & (unsigned long) buff;
if (odd) {
#ifdef __LITTLE_ENDIAN
- result = *buff;
-#else
result += (*buff << 8);
+#else
+ result = *buff;
#endif
len--;
buff++;
@@ -73,9 +74,9 @@ static unsigned int do_csum(const unsigned char *buff, int len)
}
count >>= 1; /* nr of 32-bit words.. */
if (count) {
- unsigned long carry = 0;
+ unsigned int carry = 0;
do {
- unsigned long w = *(unsigned int *) buff;
+ unsigned int w = *(unsigned int *) buff;
count--;
buff += 4;
result += carry;
@@ -102,6 +103,7 @@ static unsigned int do_csum(const unsigned char *buff, int len)
out:
return result;
}
+#endif
/*
* This is a version of ip_compute_csum() optimized for IP headers,