[PATCH] m32r: Fix sys_tas() syscall

[linux-2.6-omap-h63xx.git] / arch / m32r / kernel / sys_m32r.c

diff --git a/arch/m32r/kernel/sys_m32r.c b/arch/m32r/kernel/sys_m32r.c
index e0500e12c5fbbb934c7debc9dc84dd1d7d1300dc..fe55b28d3725b48ed48e5fcdab52902592aa2d4e 100644 (file)
--- 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;