[PATCH] make cr depend on all namespaces

["Serge E. Hallyn" <serue-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>]

This should let us get rid of some ifdefed code and reduce
chances for bad config combinations.  There's really no reason
to support it.

Signed-off-by: Serge E. Hallyn <serue-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
---
 checkpoint/Kconfig     |    5 +++++
 checkpoint/namespace.c |   10 ----------
 2 files changed, 5 insertions(+), 10 deletions(-)

diff --git a/checkpoint/Kconfig b/checkpoint/Kconfig
index 4a2c845..549668e 100644
--- a/checkpoint/Kconfig
+++ b/checkpoint/Kconfig
@@ -9,6 +9,11 @@ config DEFERQUEUE
 config CHECKPOINT
 	bool "Checkpoint/restart (EXPERIMENTAL)"
 	depends on CHECKPOINT_SUPPORT && EXPERIMENTAL
+	depends on UTS_NS
+	depends on USER_NS
+	depends on PID_NS
+	depends on NET_NS
+	depends on DEVPTS_MULTIPLE_INSTANCES
 	depends on CGROUP_FREEZER
 	select DEFERQUEUE
 	help
diff --git a/checkpoint/namespace.c b/checkpoint/namespace.c
index 4b3ac5a..6389dbd 100644
--- a/checkpoint/namespace.c
+++ b/checkpoint/namespace.c
@@ -63,7 +63,6 @@ static struct uts_namespace *do_restore_uts_ns(struct ckpt_ctx *ctx)
 	if (IS_ERR(h))
 		return (struct uts_namespace *) h;
 
-#ifdef CONFIG_UTS_NS
 	uts_ns = create_uts_ns();
 	if (!uts_ns) {
 		uts_ns = ERR_PTR(-ENOMEM);
@@ -78,15 +77,6 @@ static struct uts_namespace *do_restore_uts_ns(struct ckpt_ctx *ctx)
 	memcpy(name->machine, h->machine, sizeof(name->machine));
 	memcpy(name->domainname, h->domainname, sizeof(name->domainname));
 	up_read(&uts_sem);
-#else
-	/* complain if image contains multiple namespaces */
-	if (ctx->stats.uts_ns) {
-		uts_ns = ERR_PTR(-EEXIST);
-		goto out;
-	}
-	uts_ns = current->nsproxy->uts_ns;
-	get_uts_ns(uts_ns);
-#endif
 
 	ctx->stats.uts_ns++;
  out:
-- 
1.6.1