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Using devm_ioremap_resource() has several advantages over devm_ioremap(): - it checks the passed resource's validity; - it calls devm_request_mem_region() to check for the resource overlap; - it prints an error message in case of error. We can call devm_ioremap_resource() instead of devm_ioremap_nocache() as ioremap() and ioremap_nocache() are implemented identically on ARM. Doing this saves 2 LoCs and 80 bytes (AArch64 gcc 4.8.5). Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> |
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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.