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267b801fda
This adds a new ioctl for running fsck on a mounted, in use filesystem. This reuses the fsck_thread code from the previous patch for running fsck on an offline, unmounted filesystem, so that log messages for the fsck thread are redirected to userspace. Only one running fsck instance is allowed at a time; a new semaphore (since the lock will be taken by one thread and released by another) is added for this. 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.