powerpc/irq: use IS_ENABLED() in check_stack_overflow() (0dec6e1c) · Commits · 戴 / test

Instead of #ifdef, use IS_ENABLED(CONFIG_DEBUG_STACKOVERFLOW). This enable GCC to check for code validity even when the option is not selected. Signed-off-by:

Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by:

Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200220115141.2707-4-mpe@ellerman.id.au

arch/powerpc/kernel/irq.c

+3 −2

Original line number	Diff line number	Diff line
		@@ -599,9 +599,11 @@ u64 arch_irq_stat_cpu(unsigned int cpu)

		static inline void check_stack_overflow(void)
		{
		#ifdef CONFIG_DEBUG_STACKOVERFLOW
		long sp;

		if (!IS_ENABLED(CONFIG_DEBUG_STACKOVERFLOW))
		return;

		sp = current_stack_pointer & (THREAD_SIZE - 1);

		/* check for stack overflow: is there less than 2KB free? */
		@@ -609,7 +611,6 @@ static inline void check_stack_overflow(void)
		pr_err("do_IRQ: stack overflow: %ld\n", sp);
		dump_stack();
		}
		#endif
		}

		void __do_irq(struct pt_regs *regs)

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