linux-kernel - Re: [PATCH v3 5/5] tty/serial: Add Spreadtrum sc9836-uart driver support

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Message-ID: <3212776.kDbe7yX4eX@wuerfel>
Date:	Wed, 03 Dec 2014 10:50:17 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	Lyra Zhang <zhang.lyra@...il.com>
Cc:	Murali Karicheri <m-karicheri2@...com>,
	Chunyan Zhang <chunyan.zhang@...eadtrum.com>,
	Grant Likely <grant.likely@...aro.org>,
	"robh+dt@...nel.org" <robh+dt@...nel.org>,
	Catalin Marinas <catalin.marinas@....com>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"ijc+devicetree@...lion.org.uk" <ijc+devicetree@...lion.org.uk>,
	"jslaby@...e.cz" <jslaby@...e.cz>,
	Kumar Gala <galak@...eaurora.org>,
	Mark Brown <broonie@...aro.org>,
	Mark Rutland <mark.rutland@....com>,
	Pawel Moll <pawel.moll@....com>,
	Ramkumar Ramachandra <artagnon@...il.com>,
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	Will Deacon <will.deacon@....com>,
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	Hayato Suzuki <hytszk@...il.com>,
	Orson Zhai <orsonzhai@...il.com>,
	"geng.ren@...eadtrum.com" <geng.ren@...eadtrum.com>,
	"zhizhou.zhang" <zhizhou.zhang@...eadtrum.com>,
	"lanqing.liu@...eadtrum.com" <lanqing.liu@...eadtrum.com>,
	Wei Qiao (乔伟) <wei.qiao@...eadtrum.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"sprdlinux@...elists.org" <sprdlinux@...elists.org>,
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	"linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>,
	"linux-api@...r.kernel.org" <linux-api@...r.kernel.org>
Subject: Re: [PATCH v3 5/5] tty/serial: Add Spreadtrum sc9836-uart driver support

On Wednesday 03 December 2014 17:17:13 Lyra Zhang wrote:

> 2014-11-27 2:29 GMT+08:00 Murali Karicheri <m-karicheri2@...com>:
> > How about sorting this includes? asm/irq.h go first followed linux/ in alphabatical order?
>
> There are a few compile warnings if I moved asm/irq.h to the top of
> all included files.

The order that Murali meant is

- first all linux/*.h headers, sorted alphabetically
- then all asm/*.h headers, again sorted alphabetically

This is the recommended style in general.

> Warning details are below:
> 
> In file included from drivers/tty/serial/sprd_serial.c:14:0:
> ./arch/arm64/include/asm/irq.h:6:39: warning: ‘struct pt_regs’
> declared inside parameter list [enabled by default]
>  extern void (*handle_arch_irq)(struct pt_regs *);
>                                        ^
> ./arch/arm64/include/asm/irq.h:6:39: warning: its scope is only this
> definition or declaration, which is probably not what you want
> [enabled by default]
> ./arch/arm64/include/asm/irq.h:8:54: warning: ‘struct pt_regs’
> declared inside parameter list [enabled by default]
>  extern void set_handle_irq(void (*handle_irq)(struct pt_regs *));
> 

I would consider this a (minor) bug in asm/irq.h. If you don't mind,
please submit a patch to add a line with 'struct pt_regs;' to
asm/irq.h.

	Arnd
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