From: Borislav Petkov <bp@alien8.de>
To: Michael Matz <matz@suse.de>, Thomas Gleixner <tglx@linutronix.de>
Cc: Yi Wang <wang.yi59@zte.com.cn>,
mingo@redhat.com, hpa@zytor.com, x86@kernel.org,
suravee.suthikulpanit@amd.com, puwen@hygon.cn,
davidwang@zhaoxin.com, linux-kernel@vger.kernel.org,
zhong.weidong@zte.com.cn
Subject: Re: [PATCH v2] x86/cpu: fix prototype warning
Date: Fri, 9 Nov 2018 23:17:50 +0100 [thread overview]
Message-ID: <20181109221750.GA4971@zn.tnic> (raw)
In-Reply-To: <alpine.LSU.2.21.1811081538120.21712@wotan.suse.de>
On Thu, Nov 08, 2018 at 03:47:32PM +0000, Michael Matz wrote:
> What tglx said. If you don't intend such functions to be called
> from other units make them static, if you do intend them to be callable
> declare the properly.
Well, I'll be damned!
That just caught two bugs, the smp_thermal_interrupt() is *exactly* what
the warning is supposed to catch - functions with changed prototype!
---
From: Borislav Petkov <bp@suse.de>
Date: Fri, 9 Nov 2018 23:13:13 +0100
Subject: [PATCH] x86/mce: Fix -Wmissing-prototypes warnings
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Add the proper includes and make smca_get_name() static.
Fix an actual bug too which the warning triggered:
arch/x86/kernel/cpu/mcheck/therm_throt.c:395:39: error: conflicting \
types for ‘smp_thermal_interrupt’
asmlinkage __visible void __irq_entry smp_thermal_interrupt(struct pt_regs *r)
^~~~~~~~~~~~~~~~~~~~~
In file included from arch/x86/kernel/cpu/mcheck/therm_throt.c:29:
./arch/x86/include/asm/traps.h:107:17: note: previous declaration of \
‘smp_thermal_interrupt’ was here
asmlinkage void smp_thermal_interrupt(void);
Signed-off-by: Borislav Petkov <bp@suse.de>
---
arch/x86/kernel/cpu/mcheck/mce_amd.c | 3 ++-
arch/x86/kernel/cpu/mcheck/therm_throt.c | 3 ++-
arch/x86/kernel/cpu/mcheck/threshold.c | 1 +
3 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/cpu/mcheck/mce_amd.c b/arch/x86/kernel/cpu/mcheck/mce_amd.c
index dd33c357548f..87499b997039 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_amd.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_amd.c
@@ -23,6 +23,7 @@
#include <linux/string.h>
#include <asm/amd_nb.h>
+#include <asm/traps.h>
#include <asm/apic.h>
#include <asm/mce.h>
#include <asm/msr.h>
@@ -99,7 +100,7 @@ static u32 smca_bank_addrs[MAX_NR_BANKS][NR_BLOCKS] __ro_after_init =
[0 ... MAX_NR_BANKS - 1] = { [0 ... NR_BLOCKS - 1] = -1 }
};
-const char *smca_get_name(enum smca_bank_types t)
+static const char *smca_get_name(enum smca_bank_types t)
{
if (t >= N_SMCA_BANK_TYPES)
return NULL;
diff --git a/arch/x86/kernel/cpu/mcheck/therm_throt.c b/arch/x86/kernel/cpu/mcheck/therm_throt.c
index 0d3f6b6a5739..70a05de7ea59 100644
--- a/arch/x86/kernel/cpu/mcheck/therm_throt.c
+++ b/arch/x86/kernel/cpu/mcheck/therm_throt.c
@@ -26,6 +26,7 @@
#include <linux/cpu.h>
#include <asm/processor.h>
+#include <asm/traps.h>
#include <asm/apic.h>
#include <asm/mce.h>
#include <asm/msr.h>
@@ -391,7 +392,7 @@ static void unexpected_thermal_interrupt(void)
static void (*smp_thermal_vector)(void) = unexpected_thermal_interrupt;
-asmlinkage __visible void __irq_entry smp_thermal_interrupt(struct pt_regs *r)
+asmlinkage __visible void __irq_entry smp_thermal_interrupt(void)
{
entering_irq();
trace_thermal_apic_entry(THERMAL_APIC_VECTOR);
diff --git a/arch/x86/kernel/cpu/mcheck/threshold.c b/arch/x86/kernel/cpu/mcheck/threshold.c
index 2b584b319eff..b0c60beb6312 100644
--- a/arch/x86/kernel/cpu/mcheck/threshold.c
+++ b/arch/x86/kernel/cpu/mcheck/threshold.c
@@ -6,6 +6,7 @@
#include <linux/kernel.h>
#include <asm/irq_vectors.h>
+#include <asm/traps.h>
#include <asm/apic.h>
#include <asm/mce.h>
#include <asm/trace/irq_vectors.h>
--
2.19.1
--
Regards/Gruss,
Boris.
Good mailing practices for 400: avoid top-posting and trim the reply.
prev parent reply other threads:[~2018-11-09 22:18 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-08 1:12 [PATCH v2] x86/cpu: fix prototype warning Yi Wang
2018-11-08 15:03 ` Borislav Petkov
2018-11-08 15:32 ` Borislav Petkov
2018-11-08 15:35 ` Thomas Gleixner
2018-11-08 15:41 ` Borislav Petkov
2018-11-09 16:07 ` David Laight
2018-11-10 10:51 ` [tip:ras/core] x86/mce: Fix -Wmissing-prototypes warnings tip-bot for Borislav Petkov
2018-11-10 14:16 ` Borislav Petkov
2018-11-12 5:24 ` Ingo Molnar
2018-11-12 12:19 ` Borislav Petkov
2018-11-13 14:22 ` [tip:x86/cleanups] x86/traps: Complete prototype declarations tip-bot for Borislav Petkov
2018-11-14 13:19 ` tip-bot for Borislav Petkov
2018-11-13 14:21 ` [tip:x86/cleanups] x86/mce: Fix -Wmissing-prototypes warnings tip-bot for Borislav Petkov
2018-11-14 13:18 ` tip-bot for Borislav Petkov
2018-11-08 15:47 ` [PATCH v2] x86/cpu: fix prototype warning Michael Matz
2018-11-08 17:22 ` Borislav Petkov
[not found] ` <201811090843126464658@zte.com.cn>
2018-11-09 10:55 ` Borislav Petkov
2018-11-09 11:12 ` Greg KH
2018-11-09 11:41 ` Borislav Petkov
2018-11-09 12:25 ` Greg KH
2018-11-09 22:17 ` Borislav Petkov [this message]
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