[PATCH 5/5 v2] checksum: Optimize first addition.

The first add op. adds two 16 bit nums which cannot overflow one 32 bits receiver so use plain addition instead. --- v2 - adapt after bug fix. lib/checksum.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/lib/checksum.c b/lib/checksum.c index 9e30bdc..d4ffdfd 100644 --- a/lib/checksum.c +++ b/lib/checksum.c @@ -59,7 +59,7 @@ ipsum_calc_block(u16 *buf, unsigned len, u16 sum) acc_sum = sum; if ((u32) buf & 2) { /* Align to 32-bit boundary */ - acc_sum = add32(acc_sum, *buf++); + acc_sum += *buf++; /* two 16 bit numbers cannot overflow 32 bits */ len =- 2; } rest = len & 1; -- 1.6.4.4