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Most other drivers fill out the gpio_irq_chip using a struct gpio_irq_chip *girq helper variable for ease of reading. We also make a habit of explicitly assigning NULL and zero to the parent IRQs when using ordinary IRQ handlers in the driver, mostly for code readability and maintenance. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Dmitry Osipenko <digetx@gmail.com> Cc: Dmitry Osipenko <digetx@gmail.com> Link: https://lore.kernel.org/r/20200716092835.69176-1-linus.walleij@linaro.org
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.