kerndat: Initialize necessary kerndats on restore

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

cr-restore.c

@@ -63,6 +63,7 @@
 #include "vdso.h"
 #include "stats.h"
 #include "tun.h"
+#include "kerndat.h"
 
 #include "parasite-syscall.h"
 
@@ -1593,6 +1594,9 @@ int cr_restore_tasks(void)
 	if (init_stats(RESTORE_STATS))
 		return -1;
 
+	if (kerndat_init_rst())
+		return -1;
+
 	timing_start(TIME_RESTORE);
 
 	if (cpu_init() < 0)

include/kerndat.h

@@ -9,6 +9,7 @@
  */
 
 int kerndat_init(void);
+int kerndat_init_rst(void);
 int kerndat_get_dirty_track(void);
 
 extern dev_t kerndat_shmem_dev;

kerndat.c

@@ -152,13 +152,17 @@ int kerndat_init(void)
 	ret = kerndat_get_shmemdev();
 	if (!ret)
 		ret = kerndat_get_dirty_track();
-	if (!ret)
+
+	return ret;
+}
+
+int kerndat_init_rst(void)
+{
 	/*
 	 * Read TCP sysctls before anything else,
 	 * since the limits we're interested in are
 	 * not available inside namespaces.
 	 */
-		ret = tcp_read_sysctl_limits();
 
-	return ret;
+	return tcp_read_sysctl_limits();
 }