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Commit 737c16df authored by Will Deacon's avatar Will Deacon Committed by Catalin Marinas
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arm64: mm: don't bother invalidating the icache in switch_mm 



We don't support software broadcast of cache maintenance operations, so
this flush is not required (__sync_icache_dcache will always affect all
CPUs).

Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent 4ecf7ccb

arch/arm64/include/asm/mmu_context.h

+0 −6
Original line number Diff line number Diff line
@@ -151,12 +151,6 @@ switch_mm(struct mm_struct *prev, struct mm_struct *next, 
{

	unsigned int cpu = smp_processor_id();



#ifdef CONFIG_SMP

	/* check for possible thread migration */

	if (!cpumask_empty(mm_cpumask(next)) &&

	    !cpumask_test_cpu(cpu, mm_cpumask(next)))

		__flush_icache_all();

#endif

	if (!cpumask_test_and_set_cpu(cpu, mm_cpumask(next)) || prev != next)

		check_and_switch_context(next, tsk);

}