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We are about to optimize our timer handling logic which involves injecting irqs to the vgic directly from the irq handler. Unfortunately, the injection path can take any AP list lock and irq lock and we must therefore make sure to use spin_lock_irqsave where ever interrupts are enabled and we are taking any of those locks, to avoid deadlocking between process context and the ISR. This changes a lot of the VGIC code, but the good news are that the changes are mostly mechanical. Acked-by: Marc Zyngier <marc,zyngier@arm.com> Signed-off-by: Christoffer Dall <cdall@linaro.org> |
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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.