[ARM SMP] Do not clear cpu_vm_mask for VIPT caches

Since we do not invalidate TLBs/caches on MM switches, we should not
clear the cpu_vm_mask for the CPU.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/include/asm-arm/mmu_context.h b/include/asm-arm/mmu_context.h
index 4af9c41..57b8def 100644 (file)
--- a/include/asm-arm/mmu_context.h
+++ b/include/asm-arm/mmu_context.h
@@ -86,7 +86,8 @@ switch_mm(struct mm_struct *prev, struct mm_struct *next,
                cpu_set(cpu, next->cpu_vm_mask);
                check_context(next);
                cpu_switch_mm(next->pgd, next);
-               cpu_clear(cpu, prev->cpu_vm_mask);
+               if (cache_is_vivt())
+                       cpu_clear(cpu, prev->cpu_vm_mask);
        }
 }