Re: [PATCH 6/7] vt: Update spawnpid to be a struct pid_t

[ebiederm@xmission.com (Eric W. Biederman)]

Andrew Morton <akpm@osdl.org> writes:

> On Wed, 16 Aug 2006 23:35:57 +0400
> Oleg Nesterov <oleg@tv-sign.ru> wrote:
>
>> On 08/15, Eric W. Biederman wrote:
>> >
>> > diff --git a/drivers/char/vt_ioctl.c b/drivers/char/vt_ioctl.c
>> > index 28eff1a..d7e0187 100644
>> > --- a/drivers/char/vt_ioctl.c
>> > +++ b/drivers/char/vt_ioctl.c
>> > @@ -645,12 +645,13 @@ #endif
>> >  	 */
>> >  	case KDSIGACCEPT:
>> >  	{
>> > -		extern int spawnpid, spawnsig;
>> > +		struct pid *spawnpid;
>> 		^^^^^^^^^^^^^^^^^^^^
>> Should be "extern struct pid *spawnpid" ?
>> 
>
> It was updated thusly:  (the identifiers are a bit generic-sounding though)

I need to relook at this.  But I believe Oleg found an idiom bug in
f_getown that will also apply here.  Basically if the update is not
an atomic transaction then we need to hold a lock when updating the
struct pid pointer so updates and uses of the pointer don't race.

Assuming I need to address that.  I will place spawnpid, spawnsig,
and their lock into a structure and see if I can give it a little
bit better name.

My only defense.  I didn't change the name in the first place. :)

Eric