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Flag IOMAP_ATOMIC_SW is not really required. The idea of having this flag is that the FS ->iomap_begin callback could check if this flag is set to decide whether to do a SW (FS-based) atomic write. But the FS can set which ->iomap_begin callback it wants when deciding to do a FS-based atomic write. Furthermore, it was thought that IOMAP_ATOMIC_HW is not a proper name, as the block driver can use SW-methods to emulate an atomic write. So change back to IOMAP_ATOMIC. The ->iomap_begin callback needs though to indicate to iomap core that REQ_ATOMIC needs to be set, so add IOMAP_F_ATOMIC_BIO for that. These changes were suggested by Christoph Hellwig and Dave Chinner. Signed-off-by: John Garry <john.g.garry@oracle.com> Link: https://lore.kernel.org/r/20250320120250.4087011-4-john.g.garry@oracle.com Reviewed-by: Christoph Hellwig <hch@lst.de> 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.