1 files changed, 4 insertions, 2 deletions

diff --git a/arch/m32r/kernel/sys_m32r.c b/arch/m32r/kernel/sys_m32r.c
index e0500e12c5fb..fe55b28d3725 100644
--- a/arch/m32r/kernel/sys_m32r.c
+++ b/arch/m32r/kernel/sys_m32r.c
@@ -41,7 +41,8 @@ asmlinkage int sys_tas(int *addr)
                 return -EFAULT;
         local_irq_save(flags);
         oldval = *addr;
-        *addr = 1;
+        if (!oldval)
+                *addr = 1;
         local_irq_restore(flags);
         return oldval;
 }
@@ -59,7 +60,8 @@ asmlinkage int sys_tas(int *addr)
 
         _raw_spin_lock(&tas_lock);
         oldval = *addr;
-        *addr = 1;
+        if (!oldval)
+                *addr = 1;
         _raw_spin_unlock(&tas_lock);
 
         return oldval;