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7d0f0f0615
There are no remaining users of folio_index() outside the mm subsystem. Move it to mm/swap.h to co-locate it with swap_cache_index(), eliminating a forward declaration, and a function call overhead. Also remove the helper that was used to fix circular header dependency issue. Link: https://lkml.kernel.org/r/20250430181052.55698-6-ryncsn@gmail.com Signed-off-by: Kairui Song <kasong@tencent.com> Acked-by: David Hildenbrand <david@redhat.com> Cc: Chao Yu <chao@kernel.org> Cc: Chris Li <chrisl@kernel.org> Cc: Chris Mason <clm@fb.com> Cc: Christian Brauner <brauner@kernel.org> Cc: David Sterba <dsterba@suse.com> Cc: "Huang, Ying" <ying.huang@linux.alibaba.com> Cc: Hugh Dickins <hughd@google.com> Cc: Jaegeuk Kim <jaegeuk@kernel.org> Cc: Joanne Koong <joannelkoong@gmail.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Josef Bacik <josef@toxicpanda.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Miklos Szeredi <miklos@szeredi.hu> Cc: Nhat Pham <nphamcs@gmail.com> Cc: Qu Wenruo <wqu@suse.com> Cc: Yosry Ahmed <yosryahmed@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.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.