MIPS fixes for 4.16-rc1

A couple of MIPS fixes for 4.16-rc1, including an important regression
 in 4.15 and a rather more longstanding corner case build fix.
 
 - Fix CPS regression on older binutils due to MIPS_ISA_LEVEL_RAW fix
   (4.15)
 - Fix allmodconfig + CONFIG_MACH_TX49XX=y builds due to incorrect use of
   IS_ENABLED() (2.6.28)
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Merge tag 'mips_fixes_4.16_1' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips

Pull MIPS fixes from James Hogan:
 "A couple of MIPS fixes for 4.16-rc1, including an important regression
  in 4.15 and a rather more longstanding corner case build fix.

  These are separate from the main pull request as one of the bugs fixed
  was only recently introduced in v4.15-rc8.

   - Fix CPS regression on older binutils due to MIPS_ISA_LEVEL_RAW fix
     (4.15)

   - Fix allmodconfig + CONFIG_MACH_TX49XX=y builds due to incorrect use
     of IS_ENABLED() (2.6.28)"

* tag 'mips_fixes_4.16_1' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips:
  MIPS: TXx9: use IS_BUILTIN() for CONFIG_LEDS_CLASS
  MIPS: CPS: Fix MIPS_ISA_LEVEL_RAW fallout

arch/mips/kernel/cps-vec.S

@@ -388,15 +388,16 @@ LEAF(mips_cps_boot_vpes)
 
 #elif defined(CONFIG_MIPS_MT)
 
-	.set	push
-	.set	MIPS_ISA_LEVEL_RAW
-	.set	mt
-
 	/* If the core doesn't support MT then return */
 	has_mt	t0, 5f
 
 	/* Enter VPE configuration state */
+	.set	push
+	.set	MIPS_ISA_LEVEL_RAW
+	.set	mt
 	dvpe
+	.set	pop
+
 	PTR_LA	t1, 1f
 	jr.hb	t1
 	 nop
@@ -422,6 +423,10 @@ LEAF(mips_cps_boot_vpes)
 	mtc0	t0, CP0_VPECONTROL
 	ehb
 
+	.set	push
+	.set	MIPS_ISA_LEVEL_RAW
+	.set	mt
+
 	/* Skip the VPE if its TC is not halted */
 	mftc0	t0, CP0_TCHALT
 	beqz	t0, 2f
@@ -495,6 +500,8 @@ LEAF(mips_cps_boot_vpes)
 	ehb
 	evpe
 
+	.set	pop
+
 	/* Check whether this VPE is meant to be running */
 	li	t0, 1
 	sll	t0, t0, a1
@@ -509,7 +516,7 @@ LEAF(mips_cps_boot_vpes)
 1:	jr.hb	t0
 	 nop
 
-2:	.set	pop
+2:
 
 #endif /* CONFIG_MIPS_MT_SMP */
 

arch/mips/txx9/rbtx4939/setup.c

@@ -186,7 +186,7 @@ static void __init rbtx4939_update_ioc_pen(void)
 
 #define RBTX4939_MAX_7SEGLEDS	8
 
-#if IS_ENABLED(CONFIG_LEDS_CLASS)
+#if IS_BUILTIN(CONFIG_LEDS_CLASS)
 static u8 led_val[RBTX4939_MAX_7SEGLEDS];
 struct rbtx4939_led_data {
 	struct led_classdev cdev;
@@ -261,7 +261,7 @@ static inline void rbtx4939_led_setup(void)
 
 static void __rbtx4939_7segled_putc(unsigned int pos, unsigned char val)
 {
-#if IS_ENABLED(CONFIG_LEDS_CLASS)
+#if IS_BUILTIN(CONFIG_LEDS_CLASS)
 	unsigned long flags;
 	local_irq_save(flags);
 	/* bit7: reserved for LED class */