MIPS: Call oops_enter, oops_exit in die

This allows pause_on_oops and mtdoops to work.
Signed-off-by: Nathan Lynch <ntl@pobox.com>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2810/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/kernel/traps.c

@@ -14,6 +14,7 @@
 #include <linux/bug.h>
 #include <linux/compiler.h>
 #include <linux/init.h>
+#include <linux/kernel.h>
 #include <linux/mm.h>
 #include <linux/module.h>
 #include <linux/sched.h>
@@ -371,14 +372,19 @@ void __noreturn die(const char *str, struct pt_regs *regs)
 	static int die_counter;
 	int sig = SIGSEGV;
 #ifdef CONFIG_MIPS_MT_SMTC
-	unsigned long dvpret = dvpe();
+	unsigned long dvpret;
 #endif /* CONFIG_MIPS_MT_SMTC */
 
+	oops_enter();
+
 	if (notify_die(DIE_OOPS, str, regs, 0, regs_to_trapnr(regs), SIGSEGV) == NOTIFY_STOP)
 		sig = 0;
 
 	console_verbose();
 	raw_spin_lock_irq(&die_lock);
+#ifdef CONFIG_MIPS_MT_SMTC
+	dvpret = dvpe();
+#endif /* CONFIG_MIPS_MT_SMTC */
 	bust_spinlocks(1);
 #ifdef CONFIG_MIPS_MT_SMTC
 	mips_mt_regdump(dvpret);
@@ -389,6 +395,8 @@ void __noreturn die(const char *str, struct pt_regs *regs)
 	add_taint(TAINT_DIE);
 	raw_spin_unlock_irq(&die_lock);
 
+	oops_exit();
+
 	if (in_interrupt())
 		panic("Fatal exception in interrupt");