fc13b47692
The current informal control dependency definition in explanation.txt is too broad and, as discussed, needs to be updated. Consider the following example: > if(READ_ONCE(x)) > return 42; > > WRITE_ONCE(y, 42); > > return 21; The read event determines whether the write event will be executed "at all" - as per the current definition - but the formal LKMM does not recognize this as a control dependency. Introduce a new definition which includes the requirement for the second memory access event to syntactically lie within the arm of a non-loop conditional. Link: https://lore.kernel.org/all/20220615114330.2573952-1-paul.heidekrueger@in.tum.de/ Cc: Marco Elver <elver@google.com> Cc: Charalampos Mainas <charalampos.mainas@gmail.com> Cc: Pramod Bhatotia <pramod.bhatotia@in.tum.de> Cc: Soham Chakraborty <s.s.chakraborty@tudelft.nl> Cc: Martin Fink <martin.fink@in.tum.de> Co-developed-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Paul Heidekrüger <paul.heidekrueger@in.tum.de> Signed-off-by: Paul E. McKenney <paulmck@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.