linux-kernel - Re: [PATCH] spi/xilinx: Cast ioread32/iowrite32 function pointers

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Date:	Thu, 29 Jan 2015 17:04:03 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	linux-arm-kernel@...ts.infradead.org
Cc:	Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Michal Simek <michal.simek@...inx.com>,
	Sören Brinkmann <soren.brinkmann@...inx.com>,
	linux-spi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] spi/xilinx: Cast ioread32/iowrite32 function pointers

On Thursday 29 January 2015 15:51:13 Ricardo Ribalda Delgado wrote:
>          * Setup little endian helper functions first and try to use them
>          * and check if bit was correctly setup or not.
>          */
> -       xspi->read_fn = ioread32;
> -       xspi->write_fn = iowrite32;
> +       xspi->read_fn = (u32 (*)(void __iomem *)) ioread32;
> +       xspi->write_fn = (void (*)(u32, void __iomem *)) iowrite32;
>  
>         xspi->write_fn(XSPI_CR_LOOP, xspi->regs + XSPI_CR_OFFSET);
> 

Casting the type of a function you call seems rather dangerous. Why not
add an inline function in this driver as a wrapper?

	Arnd
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