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iov_iter: Add copy_folio_from_iter_atomic()

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Add a folio wrapper around copy_page_from_iter_atomic().

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2023-07-09 18:17:33 -04:00
parent 908a1ad894
commit 1b0306981e
2 changed files with 9 additions and 2 deletions
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9
include/linux/uio.h
View File

@ -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);

2
lib/iov_iter.c
View File

@ -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;