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When turning branch instructions into NOPs, we attempt to validate the action by comparing the old value at the call site with the opcode of a direct relative branch instruction pointing at the old target. However, these call sites are statically initialized to call _mcount(), and may be redirected via a PLT entry if the module is loaded far away from the kernel text, leading to false negatives and spurious errors. So skip the validation if CONFIG_ARM64_MODULE_PLTS is configured. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.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.