Re: [PATCH] ARM/hw_breakpoint: Fix possible recursive locking for arch_hw_breakpoint_init

From: Sebastian Andrzej Siewior
Date: Fri Jun 16 2017 - 11:43:00 EST

On 2017-06-16 01:22:38 [-0700], Tony Lindgren wrote:
> Recent change to use cpuhp_setup_state_cpuslocked() with commit
> fe2a5cd8aa03 ("ARM/hw_breakpoint: Use cpuhp_setup_state_cpuslocked()")
> missed to change the related paired cpuhp_remove_state_nocalls_cpuslocked().
> Now if arch_hw_breakpoint_init() fails, we get "WARNING: possible recursive
> locking detected" on the exit path.
> Fixes: fe2a5cd8aa03 ("ARM/hw_breakpoint: Use
> cpuhp_setup_state_cpuslocked()")
> Cc: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
> Cc: Ingo Molnar <mingo@xxxxxxxxxx>
> Cc: Mark Rutland <mark.rutland@xxxxxxx>
> Cc: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> Cc: Will Deacon <will.deacon@xxxxxxx>
> Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
> Cc: Russell King <linux@xxxxxxxxxxxxxxx>
> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>

Acked-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>

Thank you.