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

[Tony Lindgren]

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 <bige...@linutronix.de>
Cc: Ingo Molnar <mi...@kernel.org>
Cc: Mark Rutland <mark.rutl...@arm.com>
Cc: Paul E. McKenney <paul...@linux.vnet.ibm.com>
Cc: Peter Zijlstra <pet...@infradead.org>
Cc: Will Deacon <will.dea...@arm.com>
Cc: Steven Rostedt <rost...@goodmis.org>
Cc: Russell King <li...@armlinux.org.uk>
Cc: linux-arm-ker...@lists.infradead.org
Signed-off-by: Tony Lindgren <t...@atomide.com>
---
 arch/arm/kernel/hw_breakpoint.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/kernel/hw_breakpoint.c b/arch/arm/kernel/hw_breakpoint.c
--- a/arch/arm/kernel/hw_breakpoint.c
+++ b/arch/arm/kernel/hw_breakpoint.c
@@ -1106,7 +1106,7 @@ static int __init arch_hw_breakpoint_init(void)
                core_num_brps = 0;
                core_num_wrps = 0;
                if (ret > 0)
-                       cpuhp_remove_state_nocalls(ret);
+                       cpuhp_remove_state_nocalls_cpuslocked(ret);
                cpus_read_unlock();
                return 0;
        }
-- 
2.13.0