kernel/include/asm-generic/bitops/const_hweight.h, branch linux-3.0.y Hosts the 0x221E linux distro kernel. https://universe.0xinfinity.dev/distro/kernel/atom?h=linux-3.0.y 2010-04-06T22:52:11Z bitops: Optimize hweight() by making use of compile-time evaluation 2010-04-06T22:52:11Z Peter Zijlstra a.p.zijlstra@chello.nl 2010-02-01T14:03:07Z urn:sha1:1527bc8b928dd1399c3d3467dd47d9ede210978a Rename the extisting runtime hweight() implementations to __arch_hweight(), rename the compile-time versions to __const_hweight() and then have hweight() pick between them. Suggested-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <20100318111929.GB11152@aftab> Acked-by: H. Peter Anvin <hpa@zytor.com> LKML-Reference: <1265028224.24455.154.camel@laptop> Signed-off-by: H. Peter Anvin <hpa@zytor.com>