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2a20b08f06
When using ACPI on arm64, which implies the GIC IRQ model, no table should ever provide a GSI number in the range [0:15], as these are reserved for IPIs. However, drivers tend to call acpi_unregister_gsi() with any random GSI number provided by half baked tables, which results in an exploding kernel when its IPIs have been unconfigured. In order to catch this, check for the silly case early, warn that something is going wrong and avoid the above disaster. Signed-off-by: Marc Zyngier <maz@kernel.org> Reviewed-by: Sudeep Holla <sudeep.holla@arm.com> Tested-by: dann frazier <dann.frazier@canonical.com> Tested-by: Hanjun Guo <guohanjun@huawei.com> Reviewed-by: Hanjun Guo <guohanjun@huawei.com> Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Link: https://lore.kernel.org/r/20210421164317.1718831-3-maz@kernel.org Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
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.