ceph: switch netfs read ops to use rreq->inode instead of rreq->mapping->host

[ Upstream commit a25cedb4313d35e1f2968105678a47ca28e84d3b ]

One fewer pointer dereference, and in the future we may not be able to
count on the mapping pointer being populated (e.g. in the DIO case).

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index 99b80b5..b218a26 100644 (file)
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -179,7 +179,7 @@ static int ceph_releasepage(struct page *page, gfp_t gfp)
 
 static void ceph_netfs_expand_readahead(struct netfs_read_request *rreq)
 {
-       struct inode *inode = rreq->mapping->host;
+       struct inode *inode = rreq->inode;
        struct ceph_inode_info *ci = ceph_inode(inode);
        struct ceph_file_layout *lo = &ci->i_layout;
        u32 blockoff;
@@ -196,7 +196,7 @@ static void ceph_netfs_expand_readahead(struct netfs_read_request *rreq)
 
 static bool ceph_netfs_clamp_length(struct netfs_read_subrequest *subreq)
 {
-       struct inode *inode = subreq->rreq->mapping->host;
+       struct inode *inode = subreq->rreq->inode;
        struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
        struct ceph_inode_info *ci = ceph_inode(inode);
        u64 objno, objoff;
@@ -242,7 +242,7 @@ static void finish_netfs_read(struct ceph_osd_request *req)
 static void ceph_netfs_issue_op(struct netfs_read_subrequest *subreq)
 {
        struct netfs_read_request *rreq = subreq->rreq;
-       struct inode *inode = rreq->mapping->host;
+       struct inode *inode = rreq->inode;
        struct ceph_inode_info *ci = ceph_inode(inode);
        struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
        struct ceph_osd_request *req;