include/linux/pagemap.h: document trylock_page() return value

Cc: Henry Burns <[email protected]> Cc: Jonathan Adams <[email protected]> Cc: David Rientjes <[email protected]> Cc: Mike Rapoport <[email protected]> Cc: Vitaly Wool <[email protected]> Cc: Xidong Wang <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
vieko · Jul 12, 2019 · f445884 · f445884
1 parent 98ef204
commit f445884
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
@@ -452,6 +452,9 @@ extern int __lock_page_or_retry(struct page *page, struct mm_struct *mm,
 				unsigned int flags);
 extern void unlock_page(struct page *page);
 
+/*
+ * Return true if the page was successfully locked
+ */
 static inline int trylock_page(struct page *page)
 {
 	page = compound_head(page);