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8ab40fc2b9
Most of sched_clock()'s implementation is ineligible for instrumentation due to relying on sched_clock_noinstr(). Split the implementation off into an __always_inline function __sched_clock(), which is then used by the noinstr and instrumentable version, to allow more of sched_clock() to be covered by various instrumentation. This will allow instrumentation with the various sanitizers (KASAN, KCSAN, KMSAN, UBSAN). For KCSAN, we know that raw seqcount_latch usage without annotations will result in false positive reports: tell it that all of __sched_clock() is "atomic" for the latch reader; later changes in this series will take care of the writers. Co-developed-by: "Peter Zijlstra (Intel)" <peterz@infradead.org> Signed-off-by: "Peter Zijlstra (Intel)" <peterz@infradead.org> Signed-off-by: Marco Elver <elver@google.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/20241104161910.780003-3-elver@google.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 reStructuredText 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.