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5a957bbac3
Pipes use f_version to defer poll notifications until a write has been observed. Since multiple file's refer to the same struct pipe_inode_info in their ->private_data moving it into their isn't feasible since we would need to introduce an additional pointer indirection. However, since pipes don't require f_pos_lock we placed a new f_pipe member into a union with f_pos_lock that pipes can use. This is similar to what we already do for struct inode where we have additional fields per file type. This will allow us to fully remove f_version in the next step. Link: https://lore.kernel.org/r/20240830-vfs-file-f_version-v1-19-6d3e4816aa7b@kernel.org Reviewed-by: Jan Kara <jack@suse.cz> Reviewed-by: Jeff Layton <jlayton@kernel.org> 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.