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f6769581e9
We do not need to flush vgic states in each world switch unless there is pending IRQ queued to the vgic's ap list. We can thus reduce the overhead by not grabbing the spinlock and not making the extra function call to vgic_flush_lr_state. Note: list_empty is a single atomic read (uses READ_ONCE) and can therefore check if a list is empty or not without the need to take the spinlock protecting the list. Reviewed-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Shih-Wei Li <shihwei@cs.columbia.edu> Signed-off-by: Christoffer Dall <cdall@linaro.org> |
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| firmware | ||
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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.