linux-kernel - Re: [PATCH] ARM: ixp4xx: fix read{b,w,l} return types

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Date:	Wed, 25 Nov 2015 13:31:16 +0100
From:	khalasa@...p.pl (Krzysztof Hałasa)
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Imre Kaloz <kaloz@...nwrt.org>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ARM: ixp4xx: fix read{b,w,l} return types

Arnd Bergmann <arnd@...db.de> writes:

> On ixp4xx, the readl() function returns an 'unsigned long' output
> when indirect I/O is used. This is unlike any other platform, and
> it causes lots of harmless compiler warnings, such as:
>
> drivers/ata/libahci.c: In function 'ahci_show_host_version':
> drivers/ata/libahci.c:254:22: warning: format '%x' expects argument of type 'unsigned int', but argument 3 has type 'long unsigned int' [-Wformat=]
> drivers/block/mtip32xx/mtip32xx.c: In function 'mtip_hw_read_registers':
> drivers/block/mtip32xx/mtip32xx.c:2602:31: warning: format '%X' expects argument of type 'unsigned int', but argument 3 has type 'long unsigned int' [-Wformat=]
> drivers/block/cciss.c: In function 'print_cfg_table':
> drivers/block/cciss.c:3845:25: warning: format '%d' expects argument of type 'int', but argument 4 has type 'long unsigned int' [-Wformat=]
>
> This changes all six of the ixp4xx specific I/O read functions
> to return the same types that we have in the normal asm/io.h,
> to avoid the warnings.

Thanks for fixing this.

Acked-by: Krzysztof Halasa <khalasa@...p.pl>
-- 
Krzysztof Halasa

Industrial Research Institute for Automation and Measurements PIAP
Al. Jerozolimskie 202, 02-486 Warsaw, Poland
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