Commit 1b030698 authored by Matthew Wilcox (Oracle)'s avatar Matthew Wilcox (Oracle)
Browse files

iov_iter: Add copy_folio_from_iter_atomic() 



Add a folio wrapper around copy_page_from_iter_atomic().

Signed-off-by: default avatarMatthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: default avatarDarrick J. Wong <djwong@kernel.org>
parent 908a1ad8

include/linux/uio.h

+8 −1
Original line number Diff line number Diff line
@@ -163,7 +163,7 @@ static inline size_t iov_length(const struct iovec *iov, unsigned long nr_segs) 
	return ret;

}



size_t copy_page_from_iter_atomic(struct page *page, unsigned offset,

size_t copy_page_from_iter_atomic(struct page *page, size_t offset,

				  size_t bytes, struct iov_iter *i);

void iov_iter_advance(struct iov_iter *i, size_t bytes);

void iov_iter_revert(struct iov_iter *i, size_t bytes);
@@ -184,6 +184,13 @@ static inline size_t copy_folio_to_iter(struct folio *folio, size_t offset, 
{

	return copy_page_to_iter(&folio->page, offset, bytes, i);

}



static inline size_t copy_folio_from_iter_atomic(struct folio *folio,

		size_t offset, size_t bytes, struct iov_iter *i)

{

	return copy_page_from_iter_atomic(&folio->page, offset, bytes, i);

}



size_t copy_page_to_iter_nofault(struct page *page, unsigned offset,

				 size_t bytes, struct iov_iter *i);

lib/iov_iter.c

+1 −1
Original line number Diff line number Diff line
@@ -566,7 +566,7 @@ size_t iov_iter_zero(size_t bytes, struct iov_iter *i) 
}

EXPORT_SYMBOL(iov_iter_zero);



size_t copy_page_from_iter_atomic(struct page *page, unsigned offset,

size_t copy_page_from_iter_atomic(struct page *page, size_t offset,

		size_t bytes, struct iov_iter *i)

{

	size_t n, copied = 0;