Commit 5c699396 authored by Anton Blanchard's avatar Anton Blanchard Committed by Michael Ellerman
Browse files

powerpc/xmon: Reset RCU and soft lockup watchdogs 



I'm seeing RCU warnings when exiting xmon. xmon resets the NMI
watchdog, but does nothing with the RCU stall or soft lockup
watchdogs. Add a helper function that handles all three.

Signed-off-by: default avatarAnton Blanchard <anton@ozlabs.org>
Acked-by: default avatarNicholas Piggin <npiggin@gmail.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200630100218.62a3c3fb@kryten.localdomain
parent 3337bf41

arch/powerpc/xmon/xmon.c

+8 −1
Original line number Diff line number Diff line
@@ -481,6 +481,13 @@ static inline int unrecoverable_excp(struct pt_regs *regs) 
#endif

}



static void xmon_touch_watchdogs(void)

{

	touch_softlockup_watchdog_sync();

	rcu_cpu_stall_reset();

	touch_nmi_watchdog();

}



static int xmon_core(struct pt_regs *regs, int fromipi)

{

	int cmd = 0;
@@ -718,7 +725,7 @@ static int xmon_core(struct pt_regs *regs, int fromipi) 
	else

		insert_cpu_bpts();



	touch_nmi_watchdog();

	xmon_touch_watchdogs();

	local_irq_restore(flags);



	return cmd != 'X' && cmd != EOF;