arm64: smp: Mark expected switch fall-through
When fall-through warnings was enabled by default the following warning was starting to show up: In file included from ../include/linux/kernel.h:15, from ../include/linux/list.h:9, from ../include/linux/kobject.h:19, from ../include/linux/of.h:17, from ../include/linux/irqdomain.h:35, from ../include/linux/acpi.h:13, from ../arch/arm64/kernel/smp.c:9: ../arch/arm64/kernel/smp.c: In function ‘__cpu_up’: ../include/linux/printk.h:302:2: warning: this statement may fall through [-Wimplicit-fallthrough=] printk(KERN_CRIT pr_fmt(fmt), ##__VA_ARGS__) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ../arch/arm64/kernel/smp.c:156:4: note: in expansion of macro ‘pr_crit’ pr_crit("CPU%u: may not have shut down cleanly\n", cpu); ^~~~~~~ ../arch/arm64/kernel/smp.c:157:3: note: here case CPU_STUCK_IN_KERNEL: ^~~~ Rework so that the compiler doesn't warn about fall-through. Fixes: d93512ef0f0e ("Makefile: Globally enable fall-through warning") Signed-off-by: Anders Roxell <anders.roxell@linaro.org> Signed-off-by: Will Deacon <will@kernel.org>
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@ -152,8 +152,8 @@ int __cpu_up(unsigned int cpu, struct task_struct *idle)
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pr_crit("CPU%u: died during early boot\n", cpu);
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break;
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}
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/* Fall through */
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pr_crit("CPU%u: may not have shut down cleanly\n", cpu);
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/* Fall through */
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case CPU_STUCK_IN_KERNEL:
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pr_crit("CPU%u: is stuck in kernel\n", cpu);
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if (status & CPU_STUCK_REASON_52_BIT_VA)
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