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-rw-r--r--include/linux/dcache.h9
1 files changed, 7 insertions, 2 deletions
diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index 46a2ba61759..a3ed5e059d4 100644
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -95,14 +95,19 @@ struct dentry {
struct qstr d_name;
struct list_head d_lru; /* LRU list */
- struct list_head d_child; /* child of parent list */
+ /*
+ * d_child and d_rcu can share memory
+ */
+ union {
+ struct list_head d_child; /* child of parent list */
+ struct rcu_head d_rcu;
+ } d_u;
struct list_head d_subdirs; /* our children */
struct list_head d_alias; /* inode alias list */
unsigned long d_time; /* used by d_revalidate */
struct dentry_operations *d_op;
struct super_block *d_sb; /* The root of the dentry tree */
void *d_fsdata; /* fs-specific data */
- struct rcu_head d_rcu;
struct dcookie_struct *d_cookie; /* cookie, if any */
int d_mounted;
unsigned char d_iname[DNAME_INLINE_LEN_MIN]; /* small names */