(2013/12/09 15:20), Namhyung Kim wrote: > From: Oleg Nesterov <o...@redhat.com> > > uprobe_trace_print() and uprobe_perf_print() need to pass the additional > info to call_fetch() methods, currently there is no simple way to do this. > > current->utask looks like a natural place to hold this info, but we need > to allocate it before handler_chain(). > > This is a bit unfortunate, perhaps we will find a better solution later, > but this is simnple and should work right now. > > Signed-off-by: Oleg Nesterov <o...@redhat.com> > Cc: Srikar Dronamraju <sri...@linux.vnet.ibm.com> > Cc: Masami Hiramatsu <masami.hiramatsu...@hitachi.com> > Signed-off-by: Namhyung Kim <namhy...@kernel.org>
Acked-by: Masami Hiramatsu <masami.hiramatsu...@hitachi.com> Thank you! > --- > kernel/events/uprobes.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c > index 24b7d6ca871b..3cc8e0bb8acf 100644 > --- a/kernel/events/uprobes.c > +++ b/kernel/events/uprobes.c > @@ -1828,6 +1828,10 @@ static void handle_swbp(struct pt_regs *regs) > if (unlikely(!test_bit(UPROBE_COPY_INSN, &uprobe->flags))) > goto out; > > + /* Tracing handlers use ->utask to communicate with fetch methods */ > + if (!get_utask()) > + goto out; > + > handler_chain(uprobe, regs); > if (can_skip_sstep(uprobe, regs)) > goto out; > -- Masami HIRAMATSU IT Management Research Dept. Linux Technology Center Hitachi, Ltd., Yokohama Research Laboratory E-mail: masami.hiramatsu...@hitachi.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
