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00c5135dce
Inside btrfs_buffered_write(), we have a local variable @dirty_pages, recording the number of pages we dirtied in the current iteration. However we do not really need that variable, since it can be calculated from @pos and @copied. In fact there is already a problem inside the short copy path, where we use @dirty_pages to calculate the range we need to release. But that usage assumes sectorsize == PAGE_SIZE, which is no longer true. Instead of keeping @dirty_pages and cause incorrect usage, just calculate the number of dirtied pages inside btrfs_dirty_pages(). Reviewed-by: Josef Bacik <josef@toxicpanda.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> 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.