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Subject[PATCH v5 09/12] RISC-V: Use mmgrab()
Date
From: Palmer Dabbelt <palmer@sifive.com>

commit f1f1007644ff ("mm: add new mmgrab() helper") added a
helper that we missed out on.

Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Atish Patra <atish.patra@wdc.com>
---
arch/riscv/kernel/smpboot.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/riscv/kernel/smpboot.c b/arch/riscv/kernel/smpboot.c
index 4a232600..17e74831 100644
--- a/arch/riscv/kernel/smpboot.c
+++ b/arch/riscv/kernel/smpboot.c
@@ -30,6 +30,7 @@
#include <linux/irq.h>
#include <linux/of.h>
#include <linux/sched/task_stack.h>
+#include <linux/sched/mm.h>
#include <asm/irq.h>
#include <asm/mmu_context.h>
#include <asm/tlbflush.h>
@@ -101,7 +102,7 @@ asmlinkage void __init smp_callin(void)
struct mm_struct *mm = &init_mm;

/* All kernel threads share the same mm context. */
- atomic_inc(&mm->mm_count);
+ mmgrab(mm);
current->active_mm = mm;

trap_init();
--
2.7.4
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