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When building with W=1:
CC arch/m68k/coldfire/gpio.o
arch/m68k/coldfire/gpio.c:19:5: warning: no previous prototype for ‘__mcfgpio_get_value’ [-Wmissing-prototypes]
int __mcfgpio_get_value(unsigned gpio)
^~~~~~~~~~~~~~~~~~~
arch/m68k/coldfire/gpio.c:25:6: warning: no previous prototype for ‘__mcfgpio_set_value’ [-Wmissing-prototypes]
void __mcfgpio_set_value(unsigned gpio, int value)
^~~~~~~~~~~~~~~~~~~
arch/m68k/coldfire/gpio.c:50:5: warning: no previous prototype for ‘__mcfgpio_direction_input’ [-Wmissing-prototypes]
int __mcfgpio_direction_input(unsigned gpio)
^~~~~~~~~~~~~~~~~~~~~~~~~
arch/m68k/coldfire/gpio.c:65:5: warning: no previous prototype for ‘__mcfgpio_direction_output’ [-Wmissing-prototypes]
int __mcfgpio_direction_output(unsigned gpio, int value)
^~~~~~~~~~~~~~~~~~~~~~~~~~
arch/m68k/coldfire/gpio.c:96:5: warning: no previous prototype for ‘__mcfgpio_request’ [-Wmissing-prototypes]
int __mcfgpio_request(unsigned gpio)
^~~~~~~~~~~~~~~~~
arch/m68k/coldfire/gpio.c:102:6: warning: no previous prototype for ‘__mcfgpio_free’ [-Wmissing-prototypes]
void __mcfgpio_free(unsigned gpio)
^~~~~~~~~~~~~~
The local m68k asm version of gpio.h has prototypes for all of these,
but they are not always visible depending on the config options enabled.
Move the prototypes so they are always visible.
Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.