6ef02df154
bio_add_hw_page currently always fails or succeeds. This is fine for the existing callers that always add PAGE_SIZE worth given that the max_segment_size and max_sectors must always allow at least a page worth of data. But when we want to add it for bigger amounts of data this means it can also fail when adding the data to a bio, and creating a fallback for that becomes really annoying in the callers. Make use of the existing API design that allows to return a smaller length than the one passed in and add up to max_segment_size worth of data from a larger input. All the existing callers are fine with this - not because they handle this return correctly, but because they never pass more than a page in. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Link: https://lore.kernel.org/r/20231204173419.782378-3-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
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.