smp: Trace IPIs sent via arch_send_call_function_ipi_mask()

This simply wraps around the arch function and prepends it with a
tracepoint, similar to send_call_function_single_ipi().

Signed-off-by: Valentin Schneider <[e-mail]>
Signed-off-by: Peter Zijlstra (Intel) <[e-mail]>
Reviewed-by: Steven Rostedt (Google) <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

kernel/smp.c

···
 	smpcfd_prepare_cpu(smp_processor_id());
 }
 
+static __always_inline void
+send_call_function_ipi_mask(struct cpumask *mask)
+{
+	trace_ipi_send_cpumask(mask, _RET_IP_, NULL);
+	arch_send_call_function_ipi_mask(mask);
+}
+
 #ifdef CONFIG_CSD_LOCK_WAIT_DEBUG
 
 static DEFINE_STATIC_KEY_MAYBE(CONFIG_CSD_LOCK_WAIT_DEBUG_DEFAULT, csdlock_debug_enabled);
···
 		if (nr_cpus == 1)
 			send_call_function_single_ipi(last_cpu);
 		else if (likely(nr_cpus > 1))
-			arch_send_call_function_ipi_mask(cfd->cpumask_ipi);
+			send_call_function_ipi_mask(cfd->cpumask_ipi);
 	}
 
 	if (run_local && (!cond_func || cond_func(this_cpu, info))) {