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John Hubbard
65462462ff
Remove a quirky special case from follow_pfn_pte(), and adjust its callers to match. Caller changes include: __get_user_pages(): Regardless of any FOLL_* flags, get_user_pages() and its variants should handle PFN-only entries by stopping early, if the caller expected **pages to be filled in. This makes for a more reliable API, as compared to the previous approach of skipping over such entries (and thus leaving them silently unwritten). move_pages(): squash the -EEXIST error return from follow_page() into -EFAULT, because -EFAULT is listed in the man page, whereas -EEXIST is not. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: John Hubbard <[email protected]> Suggested-by: Jason Gunthorpe <[email protected]> Reviewed-by: Christoph Hellwig <[email protected]> Reviewed-by: Jan Kara <[email protected]> Cc: Peter Xu <[email protected]> Cc: Lukas Bulwahn <[email protected]> Cc: Matthew Wilcox <[email protected]> Cc: Claudio Imbrenda <[email protected]> Cc: Alex Williamson <[email protected]> Cc: Andrea Arcangeli <[email protected]> Cc: David Hildenbrand <[email protected]> Cc: Jason Gunthorpe <[email protected]> Cc: Kirill A. Shutemov <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
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.