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Because the two memory blocks (usually called MEM1 and MEM2) are not merged anymore, __request_region in kernel/resource.c will correctly allow reserving regions in the physical address space between MEM1 and MEM2, where many important peripherals are (GPIO, MMC, USB, ...). A previous change to __ioremap_caller in arch/powerpc/mm/pgtable_32.c ensures that multiple memblocks are properly considered in ioremap; this makes it unnecessary to set __allow_ioremap_reserved. Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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.