* Ananth N Mavinakayanahalli <ana...@in.ibm.com> [2012-10-29 10:57:07]:
> On Sun, Oct 28, 2012 at 06:39:25PM +0100, Oleg Nesterov wrote:
>
> Hi Oleg,
>
> > Cleanup. No need to clear TIF_UPROBE, do_notify_resume() does this.
> >
> > Signed-off-by: Oleg Nesterov <o...@redhat.com>
> > ---
> > arch/powerpc/kernel/signal.c | 4 +---
> > 1 files changed, 1 insertions(+), 3 deletions(-)
> >
> > diff --git a/arch/powerpc/kernel/signal.c b/arch/powerpc/kernel/signal.c
> > index a2dc757..3b99711 100644
> > --- a/arch/powerpc/kernel/signal.c
> > +++ b/arch/powerpc/kernel/signal.c
> > @@ -158,10 +158,8 @@ static int do_signal(struct pt_regs *regs)
> >
> > void do_notify_resume(struct pt_regs *regs, unsigned long
> > thread_info_flags)
>
> But this _is_ do_notify_resume()... I don't see this flag cleared
> anywhere else.
>
> Did you have something else in mind?
uprobe_notify_resume() itself clears TIF_UPROBES.
This change is already part of -tip but not mainline.
Hence you might have missed it.
> > {
> > - if (thread_info_flags & _TIF_UPROBE) {
> > - clear_thread_flag(TIF_UPROBE);
> > + if (thread_info_flags & _TIF_UPROBE)
> > uprobe_notify_resume(regs);
> > - }
> >
> > if (thread_info_flags & _TIF_SIGPENDING)
> > do_signal(regs);
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