[dm-devel] [PATCH v3 1/9] string: introduce memweight

[Tony Luck]

On Fri, Jun 8, 2012 at 5:50 PM, Akinobu Mita <akinobu.mita at gmail.com> wrote:
>  lib/string.c           |   36 ++++++++++++++++++++++++++++++++++++

Is lib/string.c the right place for this?  I get a build error on the
ia64 sim_defconfig:

  LD      arch/ia64/hp/sim/boot/bootloader

It fails because it pulls in lib/lib.a(string.o) to get some
innocuous function like strcpy() ... but it also gets
given memweight() which relies on __bitmap_weight()
which it doesn't have, because it doesn't include lib/built-in.o
(which is where bitmap.o, the definer of __bitmap_weight(), has
been linked).

Moving memweight() to lib/bitmap.c fixes the problem. But it
isn't really clear that it belongs there either.  Perhaps it should
be its own file lib/memweight.c that gets included in lib/lib.a?

-Tony