[RFC PATCH 3/5] smp: Add a multi-CPU variant to send_call_function_single_ipi()
From: Valentin Schneider <vschneid@redhat.com>
Date: 2022-10-07 15:46:33
Also in:
linux-alpha, linux-arm-kernel, linux-mips, linux-riscv, linux-s390, linux-sh, lkml, loongarch, sparclinux
Subsystem:
the rest · Maintainer:
Linus Torvalds
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