Skips slow part of serialize_against_pte_lookup if there is no running lockless pagetable walk.
Signed-off-by: Leonardo Bras <leona...@linux.ibm.com> --- arch/powerpc/mm/book3s64/pgtable.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/mm/book3s64/pgtable.c b/arch/powerpc/mm/book3s64/pgtable.c index 6ba6195bff1b..27966481f2a6 100644 --- a/arch/powerpc/mm/book3s64/pgtable.c +++ b/arch/powerpc/mm/book3s64/pgtable.c @@ -95,7 +95,8 @@ static void do_nothing(void *unused) void serialize_against_pte_lookup(struct mm_struct *mm) { smp_mb(); - smp_call_function_many(mm_cpumask(mm), do_nothing, NULL, 1); + if (running_lockless_pgtbl_walk(mm)) + smp_call_function_many(mm_cpumask(mm), do_nothing, NULL, 1); } /* -- 2.20.1