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From: Christophe Leroy <christophe.leroy@c-s.fr>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>,
	Michael Ellerman <mpe@ellerman.id.au>
Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: [PATCH v2 2/3] powerpc/irq: use IS_ENABLED() in check_stack_overflow()
Date: Fri, 24 Jan 2020 07:07:53 +0000 (UTC)	[thread overview]
Message-ID: <98855694e9e8993673af08cc2e97e16e0cf50f4a.1579849665.git.christophe.leroy@c-s.fr> (raw)
In-Reply-To: <435e0030e942507766cbef5bc95f906262d2ccf2.1579849665.git.christophe.leroy@c-s.fr>

Instead of #ifdef, use IS_ENABLED(CONFIG_DEBUG_STACKOVERFLOW).
This enable GCC to check for code validity even when the option
is not selected.
---
v2: rebased

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/kernel/irq.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index cd29c2eb2d8e..9333e115418f 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -598,9 +598,11 @@ 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 = get_sp() & (THREAD_SIZE - 1);
 
 	/* check for stack overflow: is there less than 2KB free? */
@@ -608,7 +610,6 @@ 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)
-- 
2.25.0


WARNING: multiple messages have this Message-ID (diff)
From: Christophe Leroy <christophe.leroy@c-s.fr>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>,
	Michael Ellerman <mpe@ellerman.id.au>
Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: [PATCH v2 2/3] powerpc/irq: use IS_ENABLED() in check_stack_overflow()
Date: Fri, 24 Jan 2020 07:07:53 +0000 (UTC)	[thread overview]
Message-ID: <98855694e9e8993673af08cc2e97e16e0cf50f4a.1579849665.git.christophe.leroy@c-s.fr> (raw)
In-Reply-To: <435e0030e942507766cbef5bc95f906262d2ccf2.1579849665.git.christophe.leroy@c-s.fr>

Instead of #ifdef, use IS_ENABLED(CONFIG_DEBUG_STACKOVERFLOW).
This enable GCC to check for code validity even when the option
is not selected.
---
v2: rebased

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/kernel/irq.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index cd29c2eb2d8e..9333e115418f 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -598,9 +598,11 @@ 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 = get_sp() & (THREAD_SIZE - 1);
 
 	/* check for stack overflow: is there less than 2KB free? */
@@ -608,7 +610,6 @@ 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)
-- 
2.25.0


  reply	other threads:[~2020-01-24  7:08 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-24  7:07 [PATCH v2 1/3] powerpc/irq: don't use current_stack_pointer() in check_stack_overflow() Christophe Leroy
2020-01-24  7:07 ` Christophe Leroy
2020-01-24  7:07 ` Christophe Leroy [this message]
2020-01-24  7:07   ` [PATCH v2 2/3] powerpc/irq: use IS_ENABLED() " Christophe Leroy
2020-01-24  7:07 ` [PATCH v2 3/3] powerpc/irq: don't use current_stack_pointer() in do_IRQ() Christophe Leroy
2020-01-24  7:07   ` Christophe Leroy

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