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477058411c
Add simple helpers that allow a struct pid to be pinned via a pidfs dentry/inode. If no pidfs dentry exists a new one will be allocated for it. A reference is taken by pidfs on @pid. The reference must be released via pidfs_put_pid(). This will allow AF_UNIX sockets to allocate a dentry for the peer credentials pid at the time they are recorded where we know the task is still alive. When the task gets reaped its exit status is guaranteed to be recorded and a pidfd can be handed out for the reaped task. Link: https://lore.kernel.org/20250425-work-pidfs-net-v2-1-450a19461e75@kernel.org Reviewed-by: Oleg Nesterov <oleg@redhat.com> Reviewed-by: David Rheinsberg <david@readahead.eu> 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.