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This patch enables arm64 to be built with vmap'd task and IRQ stacks. As vmap'd stacks are mapped at page granularity, stacks must be a multiple of PAGE_SIZE. This means that a 64K page kernel must use stacks of at least 64K in size. To minimize the increase in Image size, IRQ stacks are dynamically allocated at boot time, rather than embedding the boot CPU's IRQ stack in the kernel image. This patch was co-authored by Ard Biesheuvel and Mark Rutland. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Mark Rutland <mark.rutland@arm.com> Reviewed-by: Will Deacon <will.deacon@arm.com> Tested-by: Laura Abbott <labbott@redhat.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: James Morse <james.morse@arm.com> |
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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.