[PATCH v4 1/4] MIPS: Add BUG() at the end of nmi_exception_handler()

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In the later patch, we will remove noreturn attribute for die(), in order
to make each patch can be built without errors and warnings, just add a
noreturn function BUG() at the end of nmi_exception_handler() to make sure
it does not return, otherwise there exists the following build error after
the later patch:

  arch/mips/kernel/traps.c:2001:1: error: 'noreturn' function does return [-Werror]

Signed-off-by: Tiezhu Yang <yangtiezhu@xxxxxxxxxxx>
 arch/mips/kernel/traps.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index 246c6a6..b1b68ce 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -1998,6 +1998,7 @@ void __noreturn nmi_exception_handler(struct pt_regs *regs)
 	regs->cp0_epc = read_c0_errorepc();
 	die(str, regs);
+	BUG();
 unsigned long ebase;

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