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The function finish_parity_scrub() assume each fs block can be mapped by one page, blocking bs > ps support for raid56. Prepare it for bs > ps cases by: - Introduce a helper, verify_one_parity_step() Since the P/Q generation is always done in a vertical stripe, we have to handle the range step by step. - Only clear the rbio->dbitmap if all steps of an fs block match - Remove rbio_stripe_paddr() and sector_paddr_in_rbio() helpers Now we either use the paddrs version for checksum, or the step version for P/Q generation/recovery. - Make alloc_rbio_essential_pages() to handle bs > ps cases Since for bs > ps cases, one fs block needs multiple pages, the existing simple check against rbio->stripe_pages[] is not enough. Extract a dedicated helper, alloc_rbio_sector_pages(), for the existing alloc_rbio_essential_pages(), which is still based on sector number. 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 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.