bc00965dbf
Currently the error status of super block write is tracked in page/folio status bit Error. For that we need to keep the reference for the whole duration of write and wait. Count the number of superblock writeback errors in the btrfs_device. That means we don't need the folio to stay around until it's waited for, and can avoid the extra call to folio_get/put. Also remove a mention of PageError in a comment as it's the last mention of the page Error state. Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> 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 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.