3d671ca62a
Here iterate_all_kinds() is used just to find the first (non-empty, in case of iovec) segment. Which can be easily done explicitly. Note that in bvec case we now can get more than PAGE_SIZE worth of them, in case when we have a compound page in bvec and a range that crosses a subpage boundary. Older behaviour had been to stop on that boundary; we used to get the right first page (for_each_bvec() took care of that), but that was all we'd got. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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.