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linux/io.h defines readq() and ioremap_nocache() / iounmap() functions. If not included, the build fails: intel_telemetry_pltdrv.c:1165:31: warning: assignment makes pointer from integer without a cast [-Wint-conversion] intel_telemetry_pltdrv.c:1165:33: error: implicit declaration of function 'ioremap_nocache' [-Werror=implicit-function-declaration] intel_telemetry_pltdrv.c:1202:3: error: implicit declaration of function 'iounmap' [-Werror=implicit-function-declaration] intel_telemetry_pltdrv.c:900:20: error: implicit declaration of function 'readq' [-Werror=implicit-function-declaration] Fix this by including linux/io.h. Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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.