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a3483c3dd1
pXd_offset() doesn't return NULL. When the base is NULL, it still adds the offset. Use pXd_none() to check validity instead. It also improves performance by folding out none existing levels as pXd_none() always returns 0 in that case. Such an error is unexpected, use WARN_ON() so that the caller doesn't have to worry about it, and drop the returned value. And now that unmap_patch_area() doesn't return error, we can take into account the error returned by __patch_instruction(). While at it, remove the 'inline' property which is useless. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/299804b117fae35c786c827536c91f25352e279b.1638446239.git.christophe.leroy@csgroup.eu
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.