[RFC PATCH v2 4/8] smp: Trace IPIs sent via arch_send_call_function_ipi_mask()

[Valentin Schneider]

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 <vschn...@redhat.com>
---
 kernel/smp.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/kernel/smp.c b/kernel/smp.c
index e2ca1e2f31274..c4d561cf50d45 100644
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -160,6 +160,13 @@ void __init call_function_init(void)
        smpcfd_prepare_cpu(smp_processor_id());
 }
 
+static inline void
+send_call_function_ipi_mask(const struct cpumask *mask)
+{
+       trace_ipi_send_cpumask(mask, _RET_IP_, func);
+       arch_send_call_function_ipi_mask(mask);
+}
+
 #ifdef CONFIG_CSD_LOCK_WAIT_DEBUG
 
 static DEFINE_STATIC_KEY_FALSE(csdlock_debug_enabled);
@@ -970,7 +977,7 @@ static void smp_call_function_many_cond(const struct 
cpumask *mask,
                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);
 
                cfd_seq_store(this_cpu_ptr(&cfd_seq_local)->pinged, this_cpu, 
CFD_SEQ_NOCPU, CFD_SEQ_PINGED);
        }
-- 
2.31.1