linux-next: build warning after merge of the i2c tree

[Stephen Rothwell]

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.
-- 
Cheers,
Stephen Rothwell

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