mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-12-27 15:51:30 -05:00
559b3bbfa9
Percpu-rwsems are used for superblock locking. However, we know the read percpu-rwsem we take for sb_start_write() on a frozen filesystem needs not to inhibit system from suspending or hibernating. That means it needs to wait with TASK_UNINTERRUPTIBLE | TASK_FREEZABLE. Introduce a new percpu_down_read_freezable() that allows us to control whether TASK_FREEZABLE is added to the wait flags. Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> Link: https://lore.kernel.org/r/20250327140613.25178-2-James.Bottomley@HansenPartnership.com Signed-off-by: Christian Brauner <brauner@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 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.