[MIPS] lockdep: Handle interrupts in R3000 style c0_status register.

Check the IEP bit for R3000 style processors when checking to see if
interrupts will be reenabled in restore_all.

Signed-off-by: Chris Dearman <chris@mips.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/kernel/entry.S b/arch/mips/kernel/entry.S
index 0b78fcb..686249c 100644
--- a/arch/mips/kernel/entry.S
+++ b/arch/mips/kernel/entry.S
@@ -121,7 +121,11 @@
 	SAVE_AT
 	SAVE_TEMP
 	LONG_L	v0, PT_STATUS(sp)
-	and	v0, 1
+#if defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX)
+	and	v0, ST0_IEP
+#else
+	and	v0, ST0_IE
+#endif
 	beqz	v0, 1f
 	jal	trace_hardirqs_on
 	b	2f