Re: [PATCH -next] mtd: fsl-quadspi: Never build on SPARC

From: Guenter Roeck
Date: Fri Oct 23 2015 - 12:53:30 EST


On 10/23/2015 09:31 AM, Han Xu wrote:
On Thu, Oct 22, 2015 at 8:13 PM, Guenter Roeck <linux@xxxxxxxxxxxx> wrote:
On 10/22/2015 06:07 PM, Brian Norris wrote:

+ Han

On Wed, Oct 21, 2015 at 07:31:46AM -0700, Guenter Roeck wrote:

Attempts to build fsl-quadspi on SPARC fail with

drivers/mtd/spi-nor/fsl-quadspi.c: In function 'fsl_qspi_init_lut':
drivers/mtd/spi-nor/fsl-quadspi.c:369:1: error:
'LUT_0' undeclared (first use in this function)
drivers/mtd/spi-nor/fsl-quadspi.c:418:1: error:
pasting "LUT_" and "(" does not give a valid preprocessing token
drivers/mtd/spi-nor/fsl-quadspi.c:418:2: error:
implicit declaration of function 'LUT_'


I don't think this is only a SPARC problem. The macro concatenation is
generally suspect.

I see that READ and WRITE are problems at least. If something like
<linux/fs.h> gets included somehow, then these tokens resolve to
integers or expressions before they fall through to literal
concatentation, so we get 'LUT_0' or 'LUT_(1ULL << __REQ_WRITE)' instead
of 'LUT_READ' and 'LUT_WRITE'.
Hi Brian
We have two options, either undef READ and WRITE before these macros
or change the LUT_READ to LUT_FSLREAD and same as WRITE. So what's
your opinion? Thanks.

Undef sounds like a really bad solution to me.

Guenter


You are right, that deserves a better fix. I'll leave it up to you.

Thanks,
Guenter



______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/


--
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/