iov_iter: Handle compound highmem pages in copy_page_from_iter_atomic()

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copy_page_from_iter_atomic() already handles !highmem compound
pages correctly, but if we are passed a highmem compound page,
each base page needs to be mapped & unmapped individually.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Kent Overstreet <kent.overstreet@linux.dev>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Tested-by: Kent Overstreet <kent.overstreet@linux.dev>

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Matthew Wilcox (Oracle) 2023-06-06 16:43:32 -04:00

parent f7f9a0c873

commit 908a1ad894

1 changed files with 23 additions and 10 deletions

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lib/iov_iter.c

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