From: Li Wang <liwang@ubuntukylin.com>
Date: Thu, 19 Dec 2013 14:03:48 +0000 (-0800)
Subject: ceph fscache: Introduce a routine for uncaching single no data page from fscache
X-Git-Tag: firefly_0821_release~176^2~4547^2~58
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=3f42bc4beadef554fd0d4e6408e9142da268613b;p=firefly-linux-kernel-4.4.55.git

ceph fscache: Introduce a routine for uncaching single no data page from fscache

Signed-off-by: Li Wang <liwang@ubuntukylin.com>
Reviewed-by: Milosz Tanski <milosz@adfin.com>
---

diff --git a/fs/ceph/cache.h b/fs/ceph/cache.h
index ba949408a336..da95f61b7a09 100644
--- a/fs/ceph/cache.h
+++ b/fs/ceph/cache.h
@@ -67,6 +67,14 @@ static inline int ceph_release_fscache_page(struct page *page, gfp_t gfp)
 	return fscache_maybe_release_page(ci->fscache, page, gfp);
 }
 
+static inline void ceph_fscache_readpage_cancel(struct inode *inode,
+						struct page *page)
+{
+	struct ceph_inode_info *ci = ceph_inode(inode);
+	if (fscache_cookie_valid(ci->fscache) && PageFsCache(page))
+		__fscache_uncache_page(ci->fscache, page);
+}
+
 static inline void ceph_fscache_readpages_cancel(struct inode *inode,
 						 struct list_head *pages)
 {
@@ -145,6 +153,11 @@ static inline int ceph_release_fscache_page(struct page *page, gfp_t gfp)
 	return 1;
 }
 
+static inline void ceph_fscache_readpage_cancel(struct inode *inode,
+						struct page *page)
+{
+}
+
 static inline void ceph_fscache_readpages_cancel(struct inode *inode,
 						 struct list_head *pages)
 {