[PATCH] Revert "[PATCH] identifier to nsproxy"

This reverts commit 373beb35cd6b625e0ba4ad98baace12310a26aa8.

No one is using this identifier yet.  The purpose of this identifier is to
export nsproxy to user space which is wrong.  nsproxy is an internal
implementation optimization, which should keep our fork times from getting
slower as we increase the number of global namespaces you don't have to
share.

Adding a global identifier like this is inappropriate because it makes
namespaces inherently non-recursive, greatly limiting what we can do with
them in the future.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: Cedric Le Goater <clg@fr.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

3 files changed, 1 insertions, 5 deletions

diff --git a/include/linux/init_task.h b/include/linux/init_task.h
index b5315150199e..6383d2d83bb0 100644
--- a/include/linux/init_task.h
+++ b/include/linux/init_task.h
@@ -75,7 +75,6 @@ extern struct nsproxy init_nsproxy;
         .pid_ns         = &init_pid_ns,                                 \
         .count          = ATOMIC_INIT(1),                               \
         .nslock         = __SPIN_LOCK_UNLOCKED(nsproxy.nslock),         \
-        .id             = 0,                                            \
         .uts_ns         = &init_uts_ns,                                 \
         .mnt_ns         = NULL,                                         \
         INIT_IPC_NS(ipc_ns)                                             \
diff --git a/include/linux/nsproxy.h b/include/linux/nsproxy.h
index fdfb0e44912f..0b9f0dc30d61 100644
--- a/include/linux/nsproxy.h
+++ b/include/linux/nsproxy.h
@@ -24,7 +24,6 @@ struct pid_namespace;
 struct nsproxy {
         atomic_t count;
         spinlock_t nslock;
-        unsigned long id;
         struct uts_namespace *uts_ns;
         struct ipc_namespace *ipc_ns;
         struct mnt_namespace *mnt_ns;
diff --git a/kernel/nsproxy.c b/kernel/nsproxy.c
index e2ce748e96af..f5b9ee6f6bbb 100644
--- a/kernel/nsproxy.c
+++ b/kernel/nsproxy.c
@@ -46,10 +46,8 @@ static inline struct nsproxy *clone_namespaces(struct nsproxy *orig)
         struct nsproxy *ns;
 
         ns = kmemdup(orig, sizeof(struct nsproxy), GFP_KERNEL);
-        if (ns) {
+        if (ns)
                 atomic_set(&ns->count, 1);
-                ns->id = -1;
-        }
         return ns;
 }