[PATCH 04/15] __dput_to_list(): do decrement of refcount in the caller

[Al Viro <viro@xxxxxxxxxxxxxxxxxx>]

... and rename it to to_shrink_list(), seeing that it no longer
does dropping any references

Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
---
 fs/dcache.c | 27 +++++++++++++++------------
 1 file changed, 15 insertions(+), 12 deletions(-)

diff --git a/fs/dcache.c b/fs/dcache.c
index 4108312f2426..3a160717620b 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -902,16 +902,13 @@ void dput(struct dentry *dentry)
 }
 EXPORT_SYMBOL(dput);
 
-static void __dput_to_list(struct dentry *dentry, struct list_head *list)
+static void to_shrink_list(struct dentry *dentry, struct list_head *list)
 __must_hold(&dentry->d_lock)
 {
-	if (dentry->d_flags & DCACHE_SHRINK_LIST) {
-		/* let the owner of the list it's on deal with it */
-		--dentry->d_lockref.count;
-	} else {
+	if (!(dentry->d_flags & DCACHE_SHRINK_LIST)) {
 		if (dentry->d_flags & DCACHE_LRU_LIST)
 			d_lru_del(dentry);
-		if (!--dentry->d_lockref.count)
+		if (!dentry->d_lockref.count)
 			d_shrink_add(dentry, list);
 	}
 }
@@ -925,8 +922,10 @@ void dput_to_list(struct dentry *dentry, struct list_head *list)
 	}
 	rcu_read_unlock();
 	dentry->d_lockref.count = 1;
-	if (!retain_dentry(dentry))
-		__dput_to_list(dentry, list);
+	if (!retain_dentry(dentry)) {
+		--dentry->d_lockref.count;
+		to_shrink_list(dentry, list);
+	}
 	spin_unlock(&dentry->d_lock);
 }
 
@@ -1184,8 +1183,10 @@ void shrink_dentry_list(struct list_head *list)
 		rcu_read_unlock();
 		d_shrink_del(dentry);
 		parent = dentry->d_parent;
-		if (parent != dentry)
-			__dput_to_list(parent, list);
+		if (parent != dentry) {
+			--parent->d_lockref.count;
+			to_shrink_list(parent, list);
+		}
 		__dentry_kill(dentry);
 	}
 }
@@ -1631,8 +1632,10 @@ void shrink_dcache_parent(struct dentry *parent)
 			} else {
 				rcu_read_unlock();
 				parent = data.victim->d_parent;
-				if (parent != data.victim)
-					__dput_to_list(parent, &data.dispose);
+				if (parent != data.victim) {
+					--parent->d_lockref.count;
+					to_shrink_list(parent, &data.dispose);
+				}
 				__dentry_kill(data.victim);
 			}
 		}
-- 
2.39.2