[PATCH v2 19/24] xtensa/cpu: Make sure cpu_die() doesn't return
From: Josh Poimboeuf <jpoimboe@kernel.org>
Date: 2023-02-14 07:09:25
Also in:
linux-alpha, linux-arm-kernel, linux-mips, linux-sh, lkml, loongarch, sparclinux
Subsystem:
tensilica xtensa port (xtensa), the rest · Maintainers:
Chris Zankel, Max Filippov, Linus Torvalds
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 <jpoimboe@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 */
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2.39.1