Re: powerpc/xmon: Fix data-breakpoint

From: Michael Ellerman
Date: Thu Feb 16 2017 - 00:59:53 EST

On Tue, 2016-11-22 at 09:25:59 UTC, Ravi Bangoria wrote:
> Xmon data-breakpoint feature is broken.
> Whenever there is a watchpoint match occurs, hw_breakpoint_handler will
> be called by do_break via notifier chains mechanism. If watchpoint is
> registered by xmon, hw_breakpoint_handler won't find any associated
> perf_event and returns immediately with NOTIFY_STOP. Similarly, do_break
> also returns without notifying to xmon.
> Solve this by returning NOTIFY_DONE when hw_breakpoint_handler does not
> find any perf_event associated with matched watchpoint.
> Signed-off-by: Ravi Bangoria <ravi.bangoria@xxxxxxxxxxxxxxxxxx>

Applied to powerpc next, thanks.