fs: avoid inode RCU freeing for pseudo fs

Pseudo filesystems that don't put inode on RCU list or reachable by
rcu-walk dentries do not need to RCU free their inodes.

Signed-off-by: Nick Piggin <npiggin@kernel.dk>

2 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 1ff4d0a33b25..ea202fff44f8 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2233,6 +2233,7 @@ extern void iget_failed(struct inode *);
 extern void end_writeback(struct inode *);
 extern void __destroy_inode(struct inode *);
 extern struct inode *new_inode(struct super_block *);
+extern void free_inode_nonrcu(struct inode *inode);
 extern int should_remove_suid(struct dentry *);
 extern int file_remove_suid(struct file *);
 
diff --git a/include/linux/net.h b/include/linux/net.h
index 06bde4908473..16faa130088c 100644
--- a/include/linux/net.h
+++ b/include/linux/net.h
@@ -120,6 +120,7 @@ enum sock_shutdown_cmd {
 struct socket_wq {
         wait_queue_head_t       wait;
         struct fasync_struct    *fasync_list;
+        struct rcu_head         rcu;
 } ____cacheline_aligned_in_smp;
 
 /**