From: Mike Frysinger <vapier@gentoo.org>
To: linux-ia64@vger.kernel.org
Subject: Re: getcpu() returns EFAULT when called via the vdso
Date: Thu, 29 Nov 2012 23:34:26 +0000 [thread overview]
Message-ID: <201211291834.27817.vapier@gentoo.org> (raw)
In-Reply-To: <201205061645.24398.vapier@gentoo.org>
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On Tuesday 15 May 2012 01:41:11 Mike Frysinger wrote:
> On Tuesday 08 May 2012 17:13:28 Tony Luck wrote:
> > On Mon, May 7, 2012 at 4:53 PM, Mike Frysinger <vapier@gentoo.org> wrote:
> > > i guess that needs to load some p reg with a NULL pointer test and then
> > > do the loads/stores based on that. calling getcpu(NULL, NULL, NULL)
> > > from userspace shouldn't trigger EFAULT.
> >
> > We could do that (see attached, untested, patch). But it wouldn't help
> > the sched_getcpu() code much ... it would stop getting -EFAULT, but
> > it still wouldn't have the right return value.
>
> seems to work for me
> Tested-by: Mike Frysinger <vapier@gentoo.org>
was this patch going to get merged at some point ?
-mike
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prev parent reply other threads:[~2012-11-29 23:34 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-06 20:45 getcpu() returns EFAULT when called via the vdso Mike Frysinger
2012-05-07 17:58 ` Luck, Tony
2012-05-07 23:12 ` Mike Frysinger
2012-05-07 23:53 ` Mike Frysinger
2012-05-08 21:13 ` Tony Luck
2012-05-08 22:31 ` Mike Frysinger
2012-05-15 5:41 ` Mike Frysinger
2012-11-29 23:34 ` Mike Frysinger [this message]
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