--- linux-2.6.8.1-t028/arch/i386/kernel/i387.c.xxx	2005-08-01 11:20:06.000000000 +0400
+++ linux-2.6.8.1-t028/arch/i386/kernel/i387.c	2005-08-04 14:12:19.000000000 +0400
@@ -52,7 +52,8 @@ void init_fpu(struct task_struct *tsk)
 		memset(&tsk->thread.i387.fxsave, 0, sizeof(struct i387_fxsave_struct));
 		tsk->thread.i387.fxsave.cwd = 0x37f;
 		if (cpu_has_xmm)
-			tsk->thread.i387.fxsave.mxcsr = 0x1f80;
+			tsk->thread.i387.fxsave.mxcsr =
+				(0x1f80 & mxcsr_feature_mask);
 	} else {
 		memset(&tsk->thread.i387.fsave, 0, sizeof(struct i387_fsave_struct));
 		tsk->thread.i387.fsave.cwd = 0xffff037fu;