Re: [PATCH tip/core/rcu 2/2] documentation: Record reason for rcu_head two-byte alignment

[Steven Rostedt]

On Mon, 22 Aug 2016 20:56:09 +0200
Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:

> > Don't we have __alignof__(void *) to avoid #ifdef CONFIG_M68K and
> > other new macros ?  
> 
> Yes, but that 'hides' the m68k funny, while doing an explicit #ifdef has
> documentation value... but I don't care too deeply.

I'd recommend keeping the #ifdef, and then if another architecture
comes along that is as weird as m68k, we can use the generic
__alignof__(void *). Maybe even add that in the comment, so when/if
that arch is created, people will know how to fix it more generically.

-- Steve