From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 1 Nov 2014 15:10:28 +0000 (-0400)
Subject: kill proc_ns completely
X-Git-Tag: firefly_0821_release~176^2~2652^2~7^2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=3d3d35b1e94ec918fc0ae670663235bf197d8609;p=firefly-linux-kernel-4.4.55.git

kill proc_ns completely

procfs inodes need only the ns_ops part; nsfs inodes don't need it at all

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index 57a9be9a6668..8420a2f80811 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -66,8 +66,7 @@ static struct inode *proc_alloc_inode(struct super_block *sb)
 	ei->pde = NULL;
 	ei->sysctl = NULL;
 	ei->sysctl_entry = NULL;
-	ei->ns.ns = NULL;
-	ei->ns.ns_ops = NULL;
+	ei->ns_ops = NULL;
 	inode = &ei->vfs_inode;
 	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
 	return inode;
diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index 0fabc48d905f..d689fd6960d5 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -57,11 +57,6 @@ union proc_op {
 		struct task_struct *task);
 };
 
-struct proc_ns {
-	struct ns_common *ns;
-	const struct proc_ns_operations *ns_ops;
-};
-
 struct proc_inode {
 	struct pid *pid;
 	int fd;
@@ -69,7 +64,7 @@ struct proc_inode {
 	struct proc_dir_entry *pde;
 	struct ctl_table_header *sysctl;
 	struct ctl_table *sysctl_entry;
-	struct proc_ns ns;
+	const struct proc_ns_operations *ns_ops;
 	struct inode vfs_inode;
 };
 
diff --git a/fs/proc/namespaces.c b/fs/proc/namespaces.c
index aaaac77abad0..c9eac4563fa8 100644
--- a/fs/proc/namespaces.c
+++ b/fs/proc/namespaces.c
@@ -33,7 +33,7 @@ static const struct proc_ns_operations *ns_entries[] = {
 static void *proc_ns_follow_link(struct dentry *dentry, struct nameidata *nd)
 {
 	struct inode *inode = dentry->d_inode;
-	const struct proc_ns_operations *ns_ops = PROC_I(inode)->ns.ns_ops;
+	const struct proc_ns_operations *ns_ops = PROC_I(inode)->ns_ops;
 	struct task_struct *task;
 	struct path ns_path;
 	void *error = ERR_PTR(-EACCES);
@@ -54,7 +54,7 @@ static void *proc_ns_follow_link(struct dentry *dentry, struct nameidata *nd)
 static int proc_ns_readlink(struct dentry *dentry, char __user *buffer, int buflen)
 {
 	struct inode *inode = dentry->d_inode;
-	const struct proc_ns_operations *ns_ops = PROC_I(inode)->ns.ns_ops;
+	const struct proc_ns_operations *ns_ops = PROC_I(inode)->ns_ops;
 	struct task_struct *task;
 	char name[50];
 	int res = -EACCES;
@@ -92,7 +92,7 @@ static int proc_ns_instantiate(struct inode *dir,
 	ei = PROC_I(inode);
 	inode->i_mode = S_IFLNK|S_IRWXUGO;
 	inode->i_op = &proc_ns_link_inode_operations;
-	ei->ns.ns_ops = ns_ops;
+	ei->ns_ops = ns_ops;
 
 	d_set_d_op(dentry, &pid_dentry_operations);
 	d_add(dentry, inode);