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cd678925e9
Instead of using a @page + @pg_offset pair inside sector_ptr structure, use a single physical address instead. This allows us to grab both the page and offset from a single u64 value. Although we still need an extra bool value, @has_paddr, to distinguish if the sector is properly mapped (as the 0 physical address is totally valid). This change doesn't change the size of structure sector_ptr, but reduces the parameters of several functions. Note: the original idea and patch is from Christoph Hellwig (https://lore.kernel.org/linux-btrfs/20250409111055.3640328-7-hch@lst.de/) but the final implementation is different. Reviewed-by: Josef Bacik <josef@toxicpanda.com> Reviewed-by: Christoph Hellwig <hch@lst.de> [ Use physical addresses instead to handle highmem. ] 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.