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eb028c3345
At this point there are very few call chains that might lead to d_make_discardable() on a dentry that hadn't been made persistent: calls of simple_unlink() and simple_rmdir() in configfs and apparmorfs. Both filesystems do pin (part of) their contents in dcache, but they are currently playing very unusual games with that. Converting them to more usual patterns might be possible, but it's definitely going to be a long series of changes in both cases. For now the easiest solution is to have both stop using simple_unlink() and simple_rmdir() - that allows to make d_make_discardable() warn when given a non-persistent dentry. Rather than giving them full-blown private copies (with calls of d_make_discardable() replaced with dput()), let's pull the parts of simple_unlink() and simple_rmdir() that deal with timestamps and link counts into separate helpers (__simple_unlink() and __simple_rmdir() resp.) and have those used by configfs and apparmorfs. 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.