From: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
This patch has been added to the 3.12 stable tree. If you have any
objections, please let us know.
===============
commit b61625d24596ea44555943867d5a5c1efd81074c upstream.
Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
fs/dcache.c | 32 ++++++++++----------------------
1 file changed, 10 insertions(+), 22 deletions(-)
diff --git a/fs/dcache.c b/fs/dcache.c
index 6a9731129ae9..7839720ce9f2 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -480,27 +480,6 @@ static struct dentry *d_kill(struct dentry *dentry, struct dentry *parent)
return parent;
}
-/*
- * Unhash a dentry without inserting an RCU walk barrier or checking that
- * dentry->d_lock is locked. The caller must take care of that, if
- * appropriate.
- */
-static void __d_shrink(struct dentry *dentry)
-{
- if (!d_unhashed(dentry)) {
- struct hlist_bl_head *b;
- if (unlikely(dentry->d_flags & DCACHE_DISCONNECTED))
- b = &dentry->d_sb->s_anon;
- else
- b = d_hash(dentry->d_parent, dentry->d_name.hash);
-
- hlist_bl_lock(b);
- __hlist_bl_del(&dentry->d_hash);
- dentry->d_hash.pprev = NULL;
- hlist_bl_unlock(b);
- }
-}
-
/**
* d_drop - drop a dentry
* @dentry: dentry to drop
@@ -519,7 +498,16 @@ static void __d_shrink(struct dentry *dentry)
void __d_drop(struct dentry *dentry)
{
if (!d_unhashed(dentry)) {
- __d_shrink(dentry);
+ struct hlist_bl_head *b;
+ if (unlikely(dentry->d_flags & DCACHE_DISCONNECTED))
+ b = &dentry->d_sb->s_anon;
+ else
+ b = d_hash(dentry->d_parent, dentry->d_name.hash);
+
+ hlist_bl_lock(b);
+ __hlist_bl_del(&dentry->d_hash);
+ dentry->d_hash.pprev = NULL;
+ hlist_bl_unlock(b);
dentry_rcuwalk_barrier(dentry);
}
}
--
2.1.2
--
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