diff options
| author | Steve Sistare <steven.sistare@oracle.com> | 2024-10-25 16:11:51 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2024-10-28 19:24:23 +0300 |
| commit | a2ad1b8101a36c927bcbd1317475b9576c352155 (patch) | |
| tree | d2641b8751555a9f860ca974efd57fb0021d8449 /include/linux | |
| parent | e2d8fe9148b79ed1cbf0663edc988db7769173dc (diff) | |
| download | linux-a2ad1b8101a36c927bcbd1317475b9576c352155.tar.xz | |
mm/gup: Add folio_add_pins()
Export a function that adds pins to an already-pinned huge-page folio.
This allows any range of small pages within the folio to be unpinned later.
For example, pages pinned via memfd_pin_folios and modified by
folio_add_pins could be unpinned via unpin_user_page(s).
Link: https://patch.msgid.link/r/1729861919-234514-2-git-send-email-steven.sistare@oracle.com
Suggested-by: Jason Gunthorpe <jgg@nvidia.com>
Suggested-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/mm.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index ecf63d2b0582..f9de33ac2add 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -2524,6 +2524,7 @@ long pin_user_pages_unlocked(unsigned long start, unsigned long nr_pages, long memfd_pin_folios(struct file *memfd, loff_t start, loff_t end, struct folio **folios, unsigned int max_folios, pgoff_t *offset); +int folio_add_pins(struct folio *folio, unsigned int pins); int get_user_pages_fast(unsigned long start, int nr_pages, unsigned int gup_flags, struct page **pages); |