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appletalk/ddp.c: Neaten checksum function

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atalk_sum_partial can now use the rol16 function in bitops.h

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Joe Perches 2009-11-04 10:26:13 +00:00 committed by David S. Miller
parent fd5c002761
commit f7a3a1d8af
1 changed files with 2 additions and 7 deletions
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9
net/appletalk/ddp.c
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@ -922,13 +922,8 @@ static unsigned long atalk_sum_partial(const unsigned char *data,
{ {
/* This ought to be unwrapped neatly. I'll trust gcc for now */ /* This ought to be unwrapped neatly. I'll trust gcc for now */
while (len--) { while (len--) {
sum += *data; sum += *data++;
sum <<= 1; sum = rol16(sum, 1);
if (sum & 0x10000) {
sum++;
sum &= 0xffff;
}
data++;
} }
return sum; return sum;
} }