ARM: 6944/1: mm: allow ASID 0 to be allocated to tasks

Now that ASID 0 is no longer used as a reserved value, allow it to be
allocated to tasks.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 3 insertions, 3 deletions

diff --git a/arch/arm/mm/context.c b/arch/arm/mm/context.c
index 0d86298c727..8bfae964b13 100644
--- a/arch/arm/mm/context.c
+++ b/arch/arm/mm/context.c
@@ -94,7 +94,7 @@ static void reset_context(void *info)
                 return;
 
         smp_rmb();
-        asid = cpu_last_asid + cpu + 1;
+        asid = cpu_last_asid + cpu;
 
         flush_context();
         set_mm_context(mm, asid);
@@ -144,13 +144,13 @@ void __new_context(struct mm_struct *mm)
          * to start a new version and flush the TLB.
          */
         if (unlikely((asid & ~ASID_MASK) == 0)) {
-                asid = cpu_last_asid + smp_processor_id() + 1;
+                asid = cpu_last_asid + smp_processor_id();
                 flush_context();
 #ifdef CONFIG_SMP
                 smp_wmb();
                 smp_call_function(reset_context, NULL, 1);
 #endif
-                cpu_last_asid += NR_CPUS;
+                cpu_last_asid += NR_CPUS - 1;
         }
 
         set_mm_context(mm, asid);