6bc5636a67
The refactoring involves the following modifications: - iosize alignment In fact we don't really need to manually do alignment at all. All extent maps should already be aligned, thus basic ASSERT() check would be enough. - redundant variables We have extra variable like blocksize/pg_offset/end. They are all unnecessary. @blocksize can be replaced by sectorsize size directly, and it's only used to verify the em start/size is aligned. @pg_offset can be easily calculated using @cur and page_offset(page). @end is just assigned from @page_end and never modified, use "start + PAGE_SIZE - 1" directly and remove @page_end. - remove some BUG_ON()s The BUG_ON()s are for extent map, which we have tree-checker to check on-disk extent data item and runtime check. ASSERT() should be enough. Reviewed-by: Josef Bacik <josef@toxicpanda.com> Signed-off-by: Qu Wenruo <wqu@suse.com> Reviewed-by: David Sterba <dsterba@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.