[lkml]   [2010]   [Jan]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [2.6.33-rc5] starting emacs makes lockdep warning
On Tue, Jan 26, 2010 at 2:07 PM, Al Viro <> wrote:
> On Tue, Jan 26, 2010 at 02:01:12PM +0800, Am??rico Wang wrote:
>> I agree, it seems that patch is useless, since we already
>> do lock_kernel() before calling __f_setown()...
> What's to prevent pid from being freed under us?  BKL won't...

Hmm, I don't fully understand the race here. If it is used to protect
'pid' which we get from 'tty->pgrp' or 'current', in the former case,
it is protected by 'tty->ctrl_lock', in the later case, it doesn't need
the lock. So it's not necessary to protect 'pid' by 'tty->crtl_lock'.

Am i missing something?
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2010-01-26 07:27    [W:0.047 / U:6.868 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site