From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: include/linux/pagemap.h: document trylock_page() return value
Cc: Henry Burns <henryburns@xxxxxxxxxx>
Cc: Jonathan Adams <jwadams@xxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Mike Rapoport <rppt@xxxxxxxxxxxxxxxxxx>
Cc: Vitaly Wool <vitalywool@xxxxxxxxx>
Cc: Xidong Wang <wangxidong_97@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/pagemap.h | 3 +++
1 file changed, 3 insertions(+)
--- a/include/linux/pagemap.h~include-linux-pagemaph-document-trylock_page-return-value
+++ a/include/linux/pagemap.h
@@ -452,6 +452,9 @@ extern int __lock_page_or_retry(struct p
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);
_
