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With radix, we can get page fault with DSISR_PROTFAULT value set in case of PROT_NONE or autonuma mapping. The PROT_NONE case in handled by the vma check where we consider the access bad. For autonuma we should fall through and fixup the access mask correctly. Without this patch we trigger the WARN_ON() on radix. This code moves that WARN_ON() within a radix_enabled() check. I also moved the WARN_ON() outside the if condition making it apply for all type of faults (exec/write/read). It is also conditionalized for book3s, because BOOK3E can also get a PROTFAULT to handle the D/I cache sync. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> 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.