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1) pinned_mountpoint gets a new member - struct mount *parent. Set only if we locked the sucker; ERR_PTR() - on failed attempt. 2) do_lock_mount() et.al. return void and set ->parent to * on success with !beneath - mount corresponding to path->mnt * on success with beneath - the parent of mount corresponding to path->mnt * in case of error - ERR_PTR(-E...). IOW, we get the mount we will be actually mounting upon or ERR_PTR(). 3) we can't use CLASS, since the pinned_mountpoint is placed on hlist during initialization, so we define local macros: LOCK_MOUNT(mp, path) LOCK_MOUNT_MAYBE_BENEATH(mp, path, beneath) LOCK_MOUNT_EXACT(mp, path) All of them declare and initialize struct pinned_mountpoint mp, with unlock_mount done via __cleanup(). Users converted. [ lock_mount() is unused now; removed. Reported-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> ] Reviewed-by: Christian Brauner <brauner@kernel.org> 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.