[RFC,3/5] smp: Add a multi-CPU variant to send_call_function_single_ipi()

Commit Message

Valentin Schneider Oct. 7, 2022, 3:45 p.m. UTC

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

Signed-off-by: Valentin Schneider <[e-mail]>
---
 kernel/smp.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

Patch

diff --git a/kernel/smp.c b/kernel/smp.c
index 7a7a22d69972..387735180aed 100644
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -160,6 +160,12 @@  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(_RET_IP_, mask);
+	arch_send_call_function_ipi_mask(mask);
+}
+
 #ifdef CONFIG_CSD_LOCK_WAIT_DEBUG
 
 static DEFINE_STATIC_KEY_FALSE(csdlock_debug_enabled);
@@ -970,7 +976,7 @@  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);
 	}