Re: [PATCH] smp: harmonize prototypes of smp functions

[Javi Merino <javi.merino@arm.com>]

On Tue, Sep 17, 2013 at 10:22:28PM +0100, Andrew Morton wrote:
> On Mon,  2 Sep 2013 15:33:13 +0100 Javi Merino <javi.merino@arm.com> wrote:
> 
> > Avoid unnecessary casts from int to bool in smp functions.  Some
> > functions in kernel/smp.c have a wait parameter that can be set to one
> > if you want to wait for the command to complete.  It's defined as bool
> > in a few of them and int in the rest.  If a function with wait
> > declared as int calls a function whose prototype has wait defined as
> > bool, the compiler needs to test if the int is != 0 and change it to 1
> > if so.  This useless check can be avoided if we are consistent and
> > make all the functions use the same type for this parameter.
> 
> Yes, that's a problem with bool.
> 
> But the `wait' argument *is* a boolean and switching everything over to
> use "bool" (instead of "int") should provide similar code-size savings.
> Did you evaluate that approach?

I did; you get exactly the same code-size savings.  But then I read
this[0] and thought that "int" was preferred.

[0] https://lkml.org/lkml/2013/8/31/138

I can submit the "bool" patch instead if you prefer it.  Cheers,
Javi