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| H A D | iov_iter.c | 08aa6479 Thu Apr 29 19:42:25 CDT 2021 Al Viro <viro@zeniv.linux.org.uk> teach copy_page_to_iter() to handle compound pages
In situation when copy_page_to_iter() got a compound page the current
code would only work on systems with no CONFIG_HIGHMEM. It *is* the majority
of real-world setups, or we would've drown in bug reports by now. Still needs
fixing.
Current variant works for solitary page; rename that to
__copy_page_to_iter() and turn the handling of compound pages into a loop over
subpages.
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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