Re: [PATCH] gcc-3.1 ffs problem, kernel 2.4.18

[Linus Torvalds]

On Tue, 2 Apr 2002, Richard Henderson wrote:
> 
> That said, we should probably be using __builtin_ffs
> instead.  The compiler knows how to do bsfl plus the
> adjustment.  Plus, it knows how to evaluate it at
> compile-time for constants.

When was __builtin_ffs introduced? I know it didn't use to exist, but 
we've obviously bumped up the gcc requirements several times, so..

		Linus