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[ Upstream commit 3ec4350d4efb5ccb6bd0e11d9cf7f2be4f47297d ] For the external interrupt updating procedure in imsic, there was a spinlock to protect it already. But since it should not be preempted in any cases, we should turn to use raw_spinlock to prevent any preemption in case PREEMPT_RT was enabled. Signed-off-by: Cyan Yang <cyan.yang@sifive.com> Reviewed-by: Yong-Xuan Wang <yongxuan.wang@sifive.com> Reviewed-by: Anup Patel <anup@brainfault.org> Message-ID: <20240919160126.44487-1-cyan.yang@sifive.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> 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.