mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-05-03 20:34:23 -04:00
3d21d48e89
Similar to "bcachefs: Fix usage of six lock's percpu mode", six locks have a percpu mode, but we can't switch between percpu and non percpu modes while a lock is in use: threads attempting to take a read lock may race, and we'll end up with the read count permanently off. Fixing this the "correct" way, in six_lock_pcpu_(alloc|free) would require an RCU barrier, and we don't want to do that - instead, we have to permanently segragate percpu and non percpu objects, including when on freelists. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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.