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aab771f34e
Freeing of a namespace must be delayed until after we'd dealt with mount notifications (in namespace_unlock()). The reasons are not immediately obvious (they are buried in ->prev_ns handling in mnt_notify()), and having that free_mnt_ns() explicitly called after namespace_unlock() is asking for trouble - it does feel like they should be OK to free as soon as they've been emptied. Make the things more explicit by setting 'emptied_ns' under namespace_sem and having namespace_unlock() free the sucker as soon as it's safe to free. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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.