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-rw-r--r--fs/dcache.c27
1 files changed, 18 insertions, 9 deletions
diff --git a/fs/dcache.c b/fs/dcache.c
index 25ac74d30b..d1ab857a69 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -78,7 +78,7 @@ __cacheline_aligned_in_smp DEFINE_SEQLOCK(rename_lock);
EXPORT_SYMBOL(rename_lock);
-static struct kmem_cache *dentry_cache __read_mostly;
+static struct kmem_cache *dentry_cache __ro_after_init;
const struct qstr empty_name = QSTR_INIT("", 0);
EXPORT_SYMBOL(empty_name);
@@ -96,9 +96,9 @@ EXPORT_SYMBOL(dotdot_name);
* information, yet avoid using a prime hash-size or similar.
*/
-static unsigned int d_hash_shift __read_mostly;
+static unsigned int d_hash_shift __ro_after_init;
-static struct hlist_bl_head *dentry_hashtable __read_mostly;
+static struct hlist_bl_head *dentry_hashtable __ro_after_init;
static inline struct hlist_bl_head *d_hash(unsigned int hash)
{
@@ -787,12 +787,12 @@ static inline bool fast_dput(struct dentry *dentry)
*/
if (unlikely(ret < 0)) {
spin_lock(&dentry->d_lock);
- if (dentry->d_lockref.count > 1) {
- dentry->d_lockref.count--;
+ if (WARN_ON_ONCE(dentry->d_lockref.count <= 0)) {
spin_unlock(&dentry->d_lock);
return true;
}
- return false;
+ dentry->d_lockref.count--;
+ goto locked;
}
/*
@@ -850,6 +850,7 @@ static inline bool fast_dput(struct dentry *dentry)
* else could have killed it and marked it dead. Either way, we
* don't need to do anything else.
*/
+locked:
if (dentry->d_lockref.count) {
spin_unlock(&dentry->d_lock);
return true;
@@ -3246,11 +3247,10 @@ void d_genocide(struct dentry *parent)
d_walk(parent, parent, d_genocide_kill);
}
-void d_tmpfile(struct file *file, struct inode *inode)
+void d_mark_tmpfile(struct file *file, struct inode *inode)
{
struct dentry *dentry = file->f_path.dentry;
- inode_dec_link_count(inode);
BUG_ON(dentry->d_name.name != dentry->d_iname ||
!hlist_unhashed(&dentry->d_u.d_alias) ||
!d_unlinked(dentry));
@@ -3260,6 +3260,15 @@ void d_tmpfile(struct file *file, struct inode *inode)
(unsigned long long)inode->i_ino);
spin_unlock(&dentry->d_lock);
spin_unlock(&dentry->d_parent->d_lock);
+}
+EXPORT_SYMBOL(d_mark_tmpfile);
+
+void d_tmpfile(struct file *file, struct inode *inode)
+{
+ struct dentry *dentry = file->f_path.dentry;
+
+ inode_dec_link_count(inode);
+ d_mark_tmpfile(file, inode);
d_instantiate(dentry, inode);
}
EXPORT_SYMBOL(d_tmpfile);
@@ -3324,7 +3333,7 @@ static void __init dcache_init(void)
}
/* SLAB cache for __getname() consumers */
-struct kmem_cache *names_cachep __read_mostly;
+struct kmem_cache *names_cachep __ro_after_init;
EXPORT_SYMBOL(names_cachep);
void __init vfs_caches_init_early(void)