[SPARC32]: Need to clear PSR_EF in psr of childregs on fork() on SMP.

Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc/kernel/process.c

@@ -549,6 +549,11 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long sp,
 		}
 	}
 
+#ifdef CONFIG_SMP
+	/* FPU must be disabled on SMP. */
+	childregs->psr &= ~PSR_EF;
+#endif
+
 	/* Set the return value for the child. */
 	childregs->u_regs[UREG_I0] = current->pid;
 	childregs->u_regs[UREG_I1] = 1;