On Tue, Jun 11, 2019 at 10:25:28AM +1000, Stephen Rothwell wrote:
> Hi Wolfram,
>
> After merging the i2c tree, today's linux-next build (x86_64 allmodconfig)
> produced this warning:
>
> drivers/media/dvb-frontends/tua6100.c: In function 'tua6100_set_params':
> drivers/media/dvb-frontends/tua6100.c:71: warning: "_P" redefined
> #define _P 32
>
> In file included from include/acpi/platform/aclinux.h:54,
> from include/acpi/platform/acenv.h:152,
> from include/acpi/acpi.h:22,
> from include/linux/acpi.h:21,
> from include/linux/i2c.h:17,
> from drivers/media/dvb-frontends/tua6100.h:22,
> from drivers/media/dvb-frontends/tua6100.c:24:
> include/linux/ctype.h:14: note: this is the location of the previous definition
> #define _P 0x10 /* punct */
>
> Exposed by commit
>
> 5213d7efc8ec ("i2c: acpi: export i2c_acpi_find_adapter_by_handle")
>
> Since that included <linux/acpi.h> from <linux/i2c.h>
>
> Originally introduced by commit
>
> 00be2e7c6415 ("V4L/DVB (4606): Add driver for TUA6100")
>
> The _P in <linux/ctype.h> has existed since before git.
I suggest to fix the driver by adding a TUA6100_ prefix to the defines.
I can cook up a patch for that.
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