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[ Upstream commit05c4e2721d] commitba9196d2e0("MIPS: Make DIEI support as a config option") use CPU_HAS_DIEI to indicate whether di/ei is implemented correctly, without this patch, "local_irq_disable" from entry.S in 3A1000 (with buggy di/ei) lose protection of commite97c5b6098("MIPS: Make irqflags.h functions preempt-safe for non-mipsr2 cpus") Fixes:ba9196d2e0("MIPS: Make DIEI support as a config option") Signed-off-by: Huang Pei <huangpei@loongson.cn> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Sasha Levin <sashal@kernel.org>
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.