2018-11-13 01:56:58

by Yi Wang

[permalink] [raw]
Subject: [PATCH] x86/irq: Fix -Wmissing-prototypes warning for init_IRQ()

We get a warning when building kernel with W=1:
arch/x86/kernel/irqinit.c:79:13: warning: no previous prototype for ‘init_IRQ’ [-Wmissing-prototypes]
void __init init_IRQ(void)
^

Add the missing declaration in head file to fix this.

Signed-off-by: Yi Wang <[email protected]>
---
arch/x86/include/asm/irq.h | 2 ++
1 file changed, 2 insertions(+)

diff --git a/arch/x86/include/asm/irq.h b/arch/x86/include/asm/irq.h
index 2395bb7..399a9c5 100644
--- a/arch/x86/include/asm/irq.h
+++ b/arch/x86/include/asm/irq.h
@@ -41,6 +41,8 @@ static inline int irq_canonicalize(int irq)

extern void init_ISA_irqs(void);

+extern void __init init_IRQ(void);
+
#ifdef CONFIG_X86_LOCAL_APIC
void arch_trigger_cpumask_backtrace(const struct cpumask *mask,
bool exclude_self);
--
1.8.3.1



2018-11-13 10:17:49

by Borislav Petkov

[permalink] [raw]
Subject: Re: [PATCH] x86/irq: Fix -Wmissing-prototypes warning for init_IRQ()

On Tue, Nov 13, 2018 at 09:56:29AM +0800, Yi Wang wrote:
> We get a warning when building kernel with W=1:
> arch/x86/kernel/irqinit.c:79:13: warning: no previous prototype for ‘init_IRQ’ [-Wmissing-prototypes]
> void __init init_IRQ(void)
> ^
>
> Add the missing declaration in head file to fix this.
>
> Signed-off-by: Yi Wang <[email protected]>
> ---
> arch/x86/include/asm/irq.h | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/arch/x86/include/asm/irq.h b/arch/x86/include/asm/irq.h
> index 2395bb7..399a9c5 100644
> --- a/arch/x86/include/asm/irq.h
> +++ b/arch/x86/include/asm/irq.h
> @@ -41,6 +41,8 @@ static inline int irq_canonicalize(int irq)
>
> extern void init_ISA_irqs(void);
>
> +extern void __init init_IRQ(void);
> +
> #ifdef CONFIG_X86_LOCAL_APIC
> void arch_trigger_cpumask_backtrace(const struct cpumask *mask,
> bool exclude_self);
> --

I'm not sure we should do one patch per warning - that's too granulary.
What I did earlier was this:

make allmodconfig
make W=1 arch/x86/kernel/apic/

and then looked at all those -Wmissing-prototypes warnings.

Once I've fixed them, I commit the result as a

x86/apic: Fix -Wmissing-prototypes warnings

and this way it is more or less per subsystem or folder or whatever,
which still keeps the amount of patches sane for further handling.

Now, I did some fixes here so I'd suggest you do all your patches ontop
of tip/master after merging this branch into it:

https://git.kernel.org/pub/scm/linux/kernel/git/bp/bp.git/log/?h=tip-ras-core

I'll push it into tip the next days.

Thx.

--
Regards/Gruss,
Boris.

Good mailing practices for 400: avoid top-posting and trim the reply.

2018-11-13 11:58:09

by Borislav Petkov

[permalink] [raw]
Subject: Re: [PATCH] x86/irq: Fix -Wmissing-prototypes warning for init_IRQ()

On Tue, Nov 13, 2018 at 07:31:44PM +0800, [email protected] wrote:
> I thought this can keep patches dependent and can be reverted easily if one
> of them has something wrong.

Same thing with per-directory or subsystem - just less granulary.

> Thanks for your suggestion, I will do as you advised. :-)

Yeah, this was just an idea. Let's see how it really works out.

Thx.

--
Regards/Gruss,
Boris.

Good mailing practices for 400: avoid top-posting and trim the reply.

2018-11-14 11:05:48

by Borislav Petkov

[permalink] [raw]
Subject: Re: [PATCH] x86/irq: Fix -Wmissing-prototypes warning for init_IRQ()

On Wed, Nov 14, 2018 at 02:59:54PM +0800, [email protected] wrote:
> make allyesconfig; make W=1 arch/x86/kernel
> make: Nothing to be done for `arch/x86/kernel'

make allyesconfig; make W=1 arch/x86/kernel/

Note the trailing "/"

--
Regards/Gruss,
Boris.

Good mailing practices for 400: avoid top-posting and trim the reply.