diff mbox series

[v8,4/5] mm: release number of pages of a folio

Message ID 20240711050750.17792-5-kundan.kumar@samsung.com (mailing list archive)
State New, archived
Headers show
Series block: add larger order folio instead of pages | expand

Commit Message

Kundan Kumar July 11, 2024, 5:07 a.m. UTC 
Add a new function unpin_user_folio() to put the refs of a folio by
npages count.

Signed-off-by: Kundan Kumar <kundan.kumar@samsung.com>
---
 include/linux/mm.h |  1 +
 mm/gup.c           | 13 +++++++++++++
 2 files changed, 14 insertions(+)
diff mbox series

Patch

diff --git a/include/linux/mm.h b/include/linux/mm.h
index eb7c96d24ac0..fcf9b6263326 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1623,6 +1623,7 @@  void unpin_user_pages_dirty_lock(struct page **pages, unsigned long npages,
 void unpin_user_page_range_dirty_lock(struct page *page, unsigned long npages,
 				      bool make_dirty);
 void unpin_user_pages(struct page **pages, unsigned long npages);
+void unpin_user_folio(struct folio *folio, unsigned long npages);
 
 static inline bool is_cow_mapping(vm_flags_t flags)
 {
diff --git a/mm/gup.c b/mm/gup.c
index ca0f5cedce9b..bc96efa43d1b 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -488,6 +488,19 @@  void unpin_user_pages(struct page **pages, unsigned long npages)
 }
 EXPORT_SYMBOL(unpin_user_pages);
 
+/**
+ * unpin_user_folio() - release pages of a folio
+ * @folio:  pointer to folio to be released
+ * @npages: number of pages of same folio
+ *
+ * Release npages of the folio
+ */
+void unpin_user_folio(struct folio *folio, unsigned long npages)
+{
+	gup_put_folio(folio, npages, FOLL_PIN);
+}
+EXPORT_SYMBOL(unpin_user_folio);
+
 /*
  * Set the MMF_HAS_PINNED if not set yet; after set it'll be there for the mm's
  * lifecycle.  Avoid setting the bit unless necessary, or it might cause write