diff options
| author | Matthew Wilcox (Oracle) | 2021-10-18 10:39:06 -0400 |
|---|---|---|
| committer | Matthew Wilcox (Oracle) | 2022-01-04 13:15:33 -0500 |
| commit | d9c19d32d86fa54934b632c4314beb067bf98378 (patch) | |
| tree | 326463ed31724ea67ca921f6c3ea868a45484c1d | |
| parent | 10331795fb7991a39ebd0330fdb074cbd81fef48 (diff) | |
iov_iter: Add copy_folio_to_iter()
This wrapper around copy_page_to_iter() works because copy_page_to_iter()
handles compound pages correctly.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: William Kucharski <william.kucharski@oracle.com>
| -rw-r--r-- | include/linux/uio.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/uio.h b/include/linux/uio.h index 6350354f97e9..43321dbebba8 100644 --- a/include/linux/uio.h +++ b/include/linux/uio.h @@ -7,6 +7,7 @@ #include <linux/kernel.h> #include <linux/thread_info.h> +#include <linux/mm_types.h> #include <uapi/linux/uio.h> struct page; @@ -146,6 +147,12 @@ size_t _copy_to_iter(const void *addr, size_t bytes, struct iov_iter *i); size_t _copy_from_iter(void *addr, size_t bytes, struct iov_iter *i); size_t _copy_from_iter_nocache(void *addr, size_t bytes, struct iov_iter *i); +static inline size_t copy_folio_to_iter(struct folio *folio, size_t offset, + size_t bytes, struct iov_iter *i) +{ + return copy_page_to_iter(&folio->page, offset, bytes, i); +} + static __always_inline __must_check size_t copy_to_iter(const void *addr, size_t bytes, struct iov_iter *i) { |