1 files changed, 9 insertions, 0 deletions

diff --git a/arch/arm64/include/asm/mmu_context.h b/arch/arm64/include/asm/mmu_context.h
index a9eee33dfa62..101a42bde728 100644
--- a/arch/arm64/include/asm/mmu_context.h
+++ b/arch/arm64/include/asm/mmu_context.h
@@ -151,6 +151,15 @@ switch_mm(struct mm_struct *prev, struct mm_struct *next,
 {
         unsigned int cpu = smp_processor_id();
 
+        /*
+         * init_mm.pgd does not contain any user mappings and it is always
+         * active for kernel addresses in TTBR1. Just set the reserved TTBR0.
+         */
+        if (next == &init_mm) {
+                cpu_set_reserved_ttbr0();
+                return;
+        }
+
         if (!cpumask_test_and_set_cpu(cpu, mm_cpumask(next)) || prev != next)
                 check_and_switch_context(next, tsk);
 }