linux-kernel - Re: [PATCH 1/2] Add a kexec_crash

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Date:	Wed, 13 Jul 2016 15:03:22 +0200
From:	Petr Tesarik <ptesarik@...e.com>
To:	Josh Triplett <josh@...htriplett.org>
Cc:	Juergen Gross <jgross@...e.com>, Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Eric Biederman <ebiederm@...ssion.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Dave Young <dyoung@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Vrabel <david.vrabel@...rix.com>,
	"moderated list:XEN HYPERVISOR INTERFACE" 
	<xen-devel@...ts.xenproject.org>,
	"maintainer:X86 ARCHITECTURE 32-BIT AND 64-BIT" <x86@...nel.org>,
	"open list:KEXEC" <kexec@...ts.infradead.org>,
	open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] Add a kexec_crash_loaded() function

On Wed, 13 Jul 2016 05:52:33 -0700
Josh Triplett <josh@...htriplett.org> wrote:

> On Wed, Jul 13, 2016 at 02:19:55PM +0200, Petr Tesarik wrote:
> > --- a/kernel/kexec_core.c
> > +++ b/kernel/kexec_core.c
> > @@ -95,6 +95,12 @@ int kexec_should_crash(struct task_struct *p)
> >  	return 0;
> >  }
> >  
> > +int kexec_crash_loaded(void)
> > +{
> > +	return !!kexec_crash_image;
> > +}
> 
> Nit: this function should return bool rather than int, since it
> effectively returns true/false.

I thought about this for a moment. Since the return value should also
be used for the corresponding sysctl, which is an integer, I wasn't
sure if bool is the correct type, especially since other boolean
functions in kexec.h also return int... But that could be legacy.

I've got no problem changing the type to 'bool' if that's what it takes.

Petr T