Re: READ/WRITE definitions in drivers/spi/spi-omap-100k.c

[Linus Walleij]

On Thu, Oct 24, 2013 at 2:46 PM, Tejun Heo <tj@xxxxxxxxxx> wrote:

> Hey, guys.
>
> I was modifying includes in a core header file and got duplicate macro
> definition warnings on READ / WRITE in drivers/spi/spi-omap-100k.c.
> Apparently that driver defines READ / WRITE as macros and assigns the
> opposite values to them from the usual READ / WRITE constants defined
> in include/linux/fs.h.
>
> I just skimmed through it and there doesn't seem to be any user of the
> macros.  Can we *please* remove these?  Please note that READ / WRITE
> defined in include/linux/fs.h is something which is widely used
> throughout the kernel and there are multiple interfaces which take
> those constants.  Re-defining them in the other way around in a driver
> file can lead to subtle issues and just is a bad idea.  In general,
> refraining from using generic symbols without any qualitification in
> low level drivers would be nice.

That seems like a good idea, but we better poke the people who wrote
the code and the SPI maintainer :-)

Yours,
Linus Walleij
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/