linux-kernel - [PATCH 7/8] powerpc: use lazy mm refcount helper functions

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Date:   Sun, 29 Nov 2020 02:01:40 +1000
From:   Nicholas Piggin <npiggin@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     Nicholas Piggin <npiggin@...il.com>, x86@...nel.org,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Arnd Bergmann <arnd@...db.de>,
        Peter Zijlstra <peterz@...radead.org>,
        linux-arch@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        linux-mm@...ck.org, Anton Blanchard <anton@...abs.org>
Subject: [PATCH 7/8] powerpc: use lazy mm refcount helper functions

Use _lazy_tlb functions for lazy mm refcounting in powerpc, to prepare
to move to MMU_LAZY_TLB_SHOOTDOWN.

Signed-off-by: Nicholas Piggin <npiggin@...il.com>
---
 arch/powerpc/kernel/smp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index 8c2857cbd960..93c0eaa6f4bf 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -1395,7 +1395,7 @@ void start_secondary(void *unused)
 {
 	unsigned int cpu = raw_smp_processor_id();
 
-	mmgrab(&init_mm);
+	mmgrab_lazy_tlb(&init_mm);
 	current->active_mm = &init_mm;
 
 	smp_store_cpu_info(cpu);
-- 
2.23.0