8b0f9fa2e0
I thought Josef Bacik's patch to drop the mmap_sem was buggy, because when looking at the error cases, there was one case where we returned VM_FAULT_RETRY without actually dropping the mmap_sem. Josef had to explain to me (using small words) that yes, that's actually what we're supposed to do, and his patch was correct. Which not only convinced me he knew what he was doing and I should stop arguing with him, but also that I should add a comment to the case I was confused about. Patiently-pointed-out-by: Josef Bacik <josef@toxicpanda.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.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.