1. 0136611 [PATCH] optimize hweight64 for x86_64 by Andi Kleen · 18 years ago
  2. f9b4192 [PATCH] bitops: hweight() speedup by Akinobu Mita · 18 years ago
  3. 3b9ed1a [PATCH] bitops: generic hweight{64,32,16,8}() by Akinobu Mita · 18 years ago