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6f17400bd9
This patch introduces the following functions to handle btrfs subpage ordered (Private2) status: - btrfs_subpage_set_ordered() - btrfs_subpage_clear_ordered() - btrfs_subpage_test_ordered() These helpers can only be called when the range is ensured to be inside the page. - btrfs_page_set_ordered() - btrfs_page_clear_ordered() - btrfs_page_test_ordered() These helpers can handle both regular sector size and subpage without problem. These functions are here to coordinate btrfs_invalidatepage() with btrfs_writepage_endio_finish_ordered(), to make sure only one of those functions can finish the ordered extent. Tested-by: Ritesh Harjani <riteshh@linux.ibm.com> # [ppc64] Tested-by: Anand Jain <anand.jain@oracle.com> # [aarch64] Signed-off-by: Qu Wenruo <wqu@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
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 Restructured Text 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.