play_dead() 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. Acked-by: Florian Fainelli <f.fainelli@xxxxxxxxx> Signed-off-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx> --- arch/mips/kernel/smp-bmips.c | 2 ++ arch/mips/loongson64/smp.c | 1 + 2 files changed, 3 insertions(+) diff --git a/arch/mips/kernel/smp-bmips.c b/arch/mips/kernel/smp-bmips.c index df9158e8329d..be85fa075830 100644 --- a/arch/mips/kernel/smp-bmips.c +++ b/arch/mips/kernel/smp-bmips.c @@ -414,6 +414,8 @@ void __ref play_dead(void) " wait\n" " j bmips_secondary_reentry\n" : : : "memory"); + + BUG(); } #endif /* CONFIG_HOTPLUG_CPU */ diff --git a/arch/mips/loongson64/smp.c b/arch/mips/loongson64/smp.c index 660e1de4412a..c81c2bd07c62 100644 --- a/arch/mips/loongson64/smp.c +++ b/arch/mips/loongson64/smp.c @@ -822,6 +822,7 @@ void play_dead(void) state_addr = &per_cpu(cpu_state, cpu); mb(); play_dead_at_ckseg1(state_addr); + BUG(); } static int loongson3_disable_clock(unsigned int cpu) -- 2.39.1
