From d08e12e8126ec88d6cb1a7eb160d8d7b52c8699f Mon Sep 17 00:00:00 2001 From: Josh Poimboeuf <jpoimboe@kernel.org> Date: Mon, 13 Feb 2023 23:05:53 -0800 Subject: xtensa/cpu: Make sure cpu_die() doesn't return 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. Link: https://lore.kernel.org/r/cca346b5c87693499e630291d78fb0bf12c24290.1676358308.git.jpoimboe@kernel.org Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org> --- arch/xtensa/kernel/smp.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch/xtensa/kernel') 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 */ -- cgit v1.2.3