Re: FAILED: patch "[PATCH] mm/memory-failure.c: support use of a dedicated thread to" failed to apply to 3.10-stable tree

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On Mon, Jul 07, 2014 at 07:52:35PM -0400, Naoya Horiguchi wrote:
> On Mon, Jul 07, 2014 at 03:47:59PM -0700, Greg Kroah-Hartman wrote:
> > On Mon, Jul 07, 2014 at 03:41:11PM -0700, Greg Kroah-Hartman wrote:
> > > On Mon, Jun 30, 2014 at 01:35:54PM -0400, Naoya Horiguchi wrote:
> > > > > The patch below does not apply to the 3.10-stable tree.
> > > > > If someone wants it applied there, or to any other stable or longterm
> > > > > tree, then please email the backport, including the original git commit
> > > > > id to <stable@xxxxxxxxxxxxxxx>.
> > > > > 
> > > > 
> > > > In my check, this patch is cleanly applied on top of 3.10.45 + commit
> > > > 74614de17db6 ("mm/memory-failure.c: don't let collect_procs() skip
> > > > over processes for MF_ACTION_REQUIRED").
> > > > There might have been a conflict with other patches newly backported
> > > > to stable. Could you show me how you failed to apply?
> > > 
> > > Ah, I must have tried to apply this one before 74614de17db6, it now
> > > works in 3.10-stable, thanks.
> > 
> > Hm, the patch breaks the build with the following error:
> > 
> > mm/memory-failure.c: In function ‘find_early_kill_thread’:
> > mm/memory-failure.c:397:2: error: implicit declaration of function ‘for_each_thread’ [-Werror=implicit-function-declaration]
> >   for_each_thread(tsk, t)
> >   ^
> > mm/memory-failure.c:398:3: error: expected ‘;’ before ‘if’
> >    if ((t->flags & PF_MCE_PROCESS) && (t->flags & PF_MCE_EARLY))
> >    ^
> > 
> > which is why I think I didn't apply it before.  We don't have
> > for_each_thread() in 3.10, and backporting it is non-trivial.  Is this
> > worth it for 3.10?
> 
> OK, this is not a trivial backporting, and the fix is not for a critical bug,
> so I'm OK to drop from 3.10 and 3.4.
> 
> Thanks,
> Naoya Horiguchi
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Ok, I haven't tried it on 3.10 but for 3.11 I've also picked
0c740d0afc3bff0a097ad03a1c8df92757516f5c ("introduce for_each_thread()
to replace the buggy while_each_thread()").  Maybe that solves the
problem for 3.10 as well?

Cheers,
--
Luís
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