linux-kernel - Re: [PATCH 3/4] sys/reboot: boolize C_A

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Date:	Mon, 03 Jun 2013 08:25:25 +0800
From:	li guang <lig.fnst@...fujitsu.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	David Howells <dhowells@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Michael Kerrisk <mtk.manpages@...il.com>,
	Dave Jones <davej@...hat.com>,
	Kees Cook <keescook@...omium.org>,
	Cyrill Gorcunov <gorcunov@...nvz.org>,
	Al Viro <viro@...iv.linux.org.uk>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/4] sys/reboot: boolize C_A_D

在 2013-05-31五的 16:02 -0700，Andrew Morton写道：
> On Thu, 30 May 2013 15:58:05 +0800 liguang <lig.fnst@...fujitsu.com> wrote:
> 
> > --- a/include/linux/reboot.h
> > +++ b/include/linux/reboot.h
> > @@ -35,7 +35,7 @@ extern void kernel_restart(char *cmd);
> >  extern void kernel_halt(void);
> >  extern void kernel_power_off(void);
> >  
> > -extern int C_A_D; /* for sysctl */
> > +extern bool C_A_D; /* for sysctl */
> >  void ctrl_alt_del(void);
> 
> This means that the pointer in kernel/sysctl.c:kern_table.data now
> points at a bool but is declared to have size sizeof(int).
> 
> That happens to work with current gcc verions, but there's no rule
> which states that sizeof(bool) must equal sizeof(int).
> 
> And I'm not sure that changing kern_table to use sizeof(bool) is really
> worth all the bother.

OK, got it,

Thanks!

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