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To support ACPI systems, we need to request IRQs before CPUs are hotplugged, and thus we need to request IRQs before we know their associated PMU. This is problematic if a PMU IRQ is pending out of reset, as it may be taken before we know the PMU, and thus the IRQ handler won't be able to handle it, leaving it screaming. To avoid such problems, lets request all IRQs in a disabled state, and explicitly enable/disable them at hotplug time, when we're sure the PMU has been probed. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> |
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| kernel | ||
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| README | ||
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.