linux-kernel - [PATCH] arm64: mark expected switch fall-through

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Message-Id: <20190728230310.5924-1-mcroce@redhat.com>
Date:   Mon, 29 Jul 2019 01:03:10 +0200
From:   Matteo Croce <mcroce@...hat.com>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     Marc Zyngier <maz@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, linux-kernel@...r.kernel.org
Subject: [PATCH] arm64: mark expected switch fall-through

Move the "fallthrough" comment just because the case keyword,
fixes the following warning:

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:
   ^~~~

Signed-off-by: Matteo Croce <mcroce@...hat.com>
---
 arch/arm64/kernel/smp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
index ea90d3bd9253..018a33e01b0e 100644
--- a/arch/arm64/kernel/smp.c
+++ b/arch/arm64/kernel/smp.c
@@ -152,8 +152,8 @@ int __cpu_up(unsigned int cpu, struct task_struct *idle)
 				pr_crit("CPU%u: died during early boot\n", cpu);
 				break;
 			}
-			/* Fall through */
 			pr_crit("CPU%u: may not have shut down cleanly\n", cpu);
+			/* Fall through */
 		case CPU_STUCK_IN_KERNEL:
 			pr_crit("CPU%u: is stuck in kernel\n", cpu);
 			if (status & CPU_STUCK_REASON_52_BIT_VA)
-- 
2.21.0