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From:   Valentin Schneider <vschneid@redhat.com>
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Cc:     "Paul E. McKenney" <paulmck@kernel.org>,
        Steven Rostedt <rostedt@goodmis.org>,
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        Dave Hansen <dave.hansen@linux.intel.com>,
        "H. Peter Anvin" <hpa@zytor.com>, Marc Zyngier <maz@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Russell King <linux@armlinux.org.uk>,
        Nicholas Piggin <npiggin@gmail.com>,
        Guo Ren <guoren@kernel.org>,
        "David S. Miller" <davem@davemloft.net>
Subject: [RFC PATCH 3/5] smp: Add a multi-CPU variant to send_call_function_single_ipi()
Date:   Fri,  7 Oct 2022 16:45:31 +0100
Message-Id: <20221007154533.1878285-3-vschneid@redhat.com>
In-Reply-To: <20221007154145.1877054-1-vschneid@redhat.com>
References: <20221007154145.1877054-1-vschneid@redhat.com>
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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 <vschneid@redhat.com>
---
 kernel/smp.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

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);
 	}
-- 
2.31.1