Re: [PATCH 4/6] Implement a general log2 facility in the kernel

Russell King
2006-09-13T18:46:12Z

On Wed, Sep 13, 2006 at 08:38:59PM +0200, Geert Uytterhoeven wrote:
> On Wed, 13 Sep 2006, David Howells wrote:
> > Russell King <rmk+lkml@arm.linux.org.uk> wrote:
> >
> > > Therefore, re-using "log2()" is about as bad as re-using the "strcmp()"
> > > name to implement a function which copies strings.
> >
> > I should probably use ilog2() then which would at least be consistent with the
> > powerpc arch.
> >
> > > t.c:2: warning: conflicting types for built-in function 'log2'
>
> And apparently gcc < 4.0 doesn't give the warning.

Eh? That's gcc 3.4.3 producing that warning. It probably depends on
the target configuration.

--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of: 2.6 Serial core