Since commit 1cf4f629d9d2 ("cpu/hotplug: Move online calls to
hotplugged cpu") it is ensured that callbacks of CPU_ONLINE and
CPU_DOWN_PREPARE are processed on the hotplugged cpu. Due to this SMP
function calls are no longer required.Replace smp_call_function_single() with a direct call of reset_ctrl_regs(). To keep the calling convention, interrupts are explicitely disabled around the call. Cc: Will Deacon <[email protected]> Cc: Mark Rutland <[email protected]> Cc: Russell King <[email protected]> Cc: [email protected] Signed-off-by: Anna-Maria Gleixner <[email protected]> --- arch/arm/kernel/hw_breakpoint.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) --- a/arch/arm/kernel/hw_breakpoint.c +++ b/arch/arm/kernel/hw_breakpoint.c @@ -1023,8 +1023,11 @@ static void reset_ctrl_regs(void *unused static int dbg_reset_notify(struct notifier_block *self, unsigned long action, void *cpu) { - if ((action & ~CPU_TASKS_FROZEN) == CPU_ONLINE) - smp_call_function_single((int)cpu, reset_ctrl_regs, NULL, 1); + if ((action & ~CPU_TASKS_FROZEN) == CPU_ONLINE) { + local_irq_disable(); + reset_ctrl_regs(NULL); + local_irq_enable(); + } return NOTIFY_OK; }
