Re: [PATCH] lib/vsprintf: add %pT[C012] format specifier

From: Pavel Machek
Date: Mon Jan 06 2014 - 19:16:12 EST


Hi!

> > > > diff --git a/lib/vsprintf.c b/lib/vsprintf.c
> > > []
> > > > @@ -1232,7 +1248,7 @@ char *pointer(const char *fmt, char *buf, char *end, void *ptr,
> > > > {
> > > > int default_width = 2 * sizeof(void *) + (spec.flags & SPECIAL ? 2 : 0);
> > > >
> > > > - if (!ptr && *fmt != 'K') {
> > > > + if (!ptr && *fmt != 'K' && *fmt != 'T') {
> > >
> > > I think this new 'T' comparison isn't necessary.
> >
> > This is needed for allowing comm_name() to accept NULL instead of current.
>
> Yeah, that's what I think isn't necessary.
>
> current is current_thread_info()->task.
>
> I think it's pretty lightweight in all arches and
> it'd be simpler/more intelligible to not use NULL.
>
> Andrew? Any opinion? Anyone else?

Andrew was worried about all the "current" duplication, IIRC. It is in
the mail thread somewhere. And one condition in printk is price worth paying.
Pavel
--
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(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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