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The vtable call pin2mask() was introducing a vtable function call in every gpiochip callback for a generic MMIO GPIO chip. This was not exactly efficient. (Maybe link-time optimization could get rid of it, I don't know.) After removing all external calls into this API we can make it a boolean flag in the struct gpio_chip call and sink the function into the gpio-mmio driver yielding encapsulation and potential speedups. Cc: Anton Vorontsov <anton@enomsg.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.