ceph: fix comments mentioning i_mutex

inode->i_mutex has been replaced with inode->i_rwsem long ago. Fix
comments still mentioning i_mutex.

Signed-off-by: hongnanli <hongnan.li@linux.alibaba.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 133dbd9..0cf6afe 100644 (file)
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -145,7 +145,7 @@ __dcache_find_get_entry(struct dentry *parent, u64 idx,
                        return ERR_PTR(-EAGAIN);
                }
                /* reading/filling the cache are serialized by
-                  i_mutex, no need to use page lock */
+                  i_rwsem, no need to use page lock */
                unlock_page(cache_ctl->page);
                cache_ctl->dentries = kmap(cache_ctl->page);
        }
@@ -155,7 +155,7 @@ __dcache_find_get_entry(struct dentry *parent, u64 idx,
        rcu_read_lock();
        spin_lock(&parent->d_lock);
        /* check i_size again here, because empty directory can be
-        * marked as complete while not holding the i_mutex. */
+        * marked as complete while not holding the i_rwsem. */
        if (ceph_dir_is_complete_ordered(dir) && ptr_pos < i_size_read(dir))
                dentry = cache_ctl->dentries[cache_ctl->index];
        else
@@ -671,7 +671,7 @@ struct dentry *ceph_handle_snapdir(struct ceph_mds_request *req,
                                   struct dentry *dentry)
 {
        struct ceph_fs_client *fsc = ceph_sb_to_client(dentry->d_sb);
-       struct inode *parent = d_inode(dentry->d_parent); /* we hold i_mutex */
+       struct inode *parent = d_inode(dentry->d_parent); /* we hold i_rwsem */
 
        /* .snap dir? */
        if (ceph_snap(parent) == CEPH_NOSNAP &&

diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index ef4a980..22adddb 100644 (file)
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -1201,7 +1201,7 @@ out_unlock:
 
 /*
  * splice a dentry to an inode.
- * caller must hold directory i_mutex for this to be safe.
+ * caller must hold directory i_rwsem for this to be safe.
  */
 static int splice_dentry(struct dentry **pdn, struct inode *in)
 {
@@ -1598,7 +1598,7 @@ static int fill_readdir_cache(struct inode *dir, struct dentry *dn,
                        return idx == 0 ? -ENOMEM : 0;
                }
                /* reading/filling the cache are serialized by
-                * i_mutex, no need to use page lock */
+                * i_rwsem, no need to use page lock */
                unlock_page(ctl->page);
                ctl->dentries = kmap(ctl->page);
                if (idx == 0)