From: David Hildenbrand <dahi@xxxxxxxxxxxxxxxxxx>
Let's introduce that helper.
Signed-off-by: David Hildenbrand <dahi@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
---
include/linux/page_ref.h | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/include/linux/page_ref.h b/include/linux/page_ref.h
index 8b5e0a9..610e132 100644
--- a/include/linux/page_ref.h
+++ b/include/linux/page_ref.h
@@ -124,6 +124,15 @@ static inline int page_ref_sub_and_test(struct page *page, int nr)
return ret;
}
+static inline int page_ref_inc_return(struct page *page)
+{
+ int ret = atomic_inc_return(&page->_refcount);
+
+ if (page_ref_tracepoint_active(__tracepoint_page_ref_mod_and_return))
+ __page_ref_mod_and_return(page, 1, ret);
+ return ret;
+}
+
static inline int page_ref_dec_and_test(struct page *page)
{
int ret = atomic_dec_and_test(&page->_refcount);
--
2.5.5
--
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