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From: Roland McGrath <roland@redhat.com>
To: Oleg Nesterov <oleg@redhat.com>
Cc: jdike@addtoit.com, linux-kernel@vger.kernel.org,
	user-mode-linux-devel@lists.sourceforge.net
Subject: Re: PT_DTRACE && uml
Date: Wed, 22 Apr 2009 23:39:49 -0700 (PDT)	[thread overview]
Message-ID: <20090423063949.8DE92FC3C7@magilla.sf.frob.com> (raw)
In-Reply-To: Oleg Nesterov's message of  Thursday, 23 April 2009 00:17:26 +0200 <20090422221726.GC22755@redhat.com>

> (cc Jeff Dike)

I've also CC'd the UML hackers' mailing list.

> So, arch/um/ seems to be the only user of PT_DTRACE.
> 
> I do not understand this code at all. It looks as if we can just
> s/PT_DTRACE/TIF_SINGLESTEP/.
> 
> But it can't be that simple?

I don't really understand off hand how UML is using PT_DTRACE either.
But clearly it (or any real arch) that needs a flag for an arch purpose
can use a TIF_* bit instead of touching ->ptrace, and should do that.


Thanks,
Roland

  reply	other threads:[~2009-04-23  6:40 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20090330185146.D525AFC3AB@magilla.sf.frob.com>
     [not found] ` <20090408203954.GA26816@redhat.com>
     [not found]   ` <20090416204004.GA28013@redhat.com>
     [not found]     ` <20090416232430.4DAE4FC3C6@magilla.sf.frob.com>
     [not found]       ` <20090420183718.GC32527@redhat.com>
     [not found]         ` <20090421011354.4B19EFC3C7@magilla.sf.frob.com>
     [not found]           ` <20090421214819.GA22845@redhat.com>
     [not found]             ` <20090422032205.B8D39FC3C7@magilla.sf.frob.com>
2009-04-22 22:04               ` ptracee data structures cleanup Oleg Nesterov
2009-04-22 22:06                 ` remove PT_DTRACE from arch/* except arch/um Oleg Nesterov
2009-04-23  6:36                   ` Roland McGrath
2009-04-22 22:17                 ` PT_DTRACE && uml Oleg Nesterov
2009-04-23  6:39                   ` Roland McGrath [this message]
2009-04-23 16:02                   ` Jeff Dike
2009-04-26 22:09                     ` Oleg Nesterov
2009-04-26 23:18                       ` copy_process() && ti->flags (Was: PT_DTRACE && uml) Oleg Nesterov
2009-04-27  2:10                         ` Roland McGrath
2009-04-22 23:01                 ` ptracee data structures cleanup Mike Frysinger
2009-04-23  6:41                   ` Roland McGrath

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