[PATCH v2 19/24] xtensa/cpu: Make sure cpu_die() doesn't return

[Josh Poimboeuf]

cpu_die() doesn't return.  Make that more explicit with a BUG().

BUG() is preferable to unreachable() because BUG() is a more explicit
failure mode and avoids undefined behavior like falling off the edge of
the function into whatever code happens to be next.

Signed-off-by: Josh Poimboeuf <jpoim...@kernel.org>
---
 arch/xtensa/kernel/smp.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/xtensa/kernel/smp.c b/arch/xtensa/kernel/smp.c
index 4dc109dd6214..7bad78495536 100644
--- a/arch/xtensa/kernel/smp.c
+++ b/arch/xtensa/kernel/smp.c
@@ -341,6 +341,8 @@ void __ref cpu_die(void)
        __asm__ __volatile__(
                        "       movi    a2, cpu_restart\n"
                        "       jx      a2\n");
+
+       BUG();
 }
 
 #endif /* CONFIG_HOTPLUG_CPU */
-- 
2.39.1