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When calling btrfs_is_data_extent_shared() we pass two ulists that were allocated by the caller. This is because the single caller, fiemap, calls btrfs_is_data_extent_shared() multiple times and the ulists can be reused, instead of allocating new ones before each call and freeing them after each call. Now that we have a context structure/object that we pass to btrfs_is_data_extent_shared(), we can move those ulists to it, and hide their allocation and the context's allocation in a helper function, as well as the freeing of the ulists and the context object. This allows to reduce the number of parameters passed to btrfs_is_data_extent_shared(), the need to pass the ulists from extent_fiemap() to fiemap_process_hole() and having the caller deal with allocating and releasing the ulists. Also rename one of the ulists from 'tmp' / 'tmp_ulist' to 'refs', since that's a much better name as it reflects what the list is used for (and matching the argument name for find_parent_nodes()). Signed-off-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: David Sterba <dsterba@suse.com> |
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
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.