vfs: trim includes a bit

[folded fix for missing magic.h from Tetsuo Handa]
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/namespace.c

@@ -9,30 +9,17 @@
  */
 
 #include <linux/syscalls.h>
-#include <linux/slab.h>
-#include <linux/sched.h>
-#include <linux/spinlock.h>
-#include <linux/percpu.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/acct.h>
+#include <linux/export.h>
 #include <linux/capability.h>
-#include <linux/cpumask.h>
-#include <linux/module.h>
-#include <linux/sysfs.h>
-#include <linux/seq_file.h>
 #include <linux/mnt_namespace.h>
 #include <linux/namei.h>
-#include <linux/nsproxy.h>
 #include <linux/security.h>
-#include <linux/mount.h>
-#include <linux/ramfs.h>
-#include <linux/log2.h>
 #include <linux/idr.h>
-#include <linux/fs_struct.h>
-#include <linux/fsnotify.h>
-#include <asm/uaccess.h>
-#include <asm/unistd.h>
+#include <linux/acct.h>		/* acct_auto_close_mnt */
+#include <linux/ramfs.h>	/* init_rootfs */
+#include <linux/fs_struct.h>	/* get_fs_root et.al. */
+#include <linux/fsnotify.h>	/* fsnotify_vfsmount_delete */
+#include <linux/uaccess.h>
 #include "pnode.h"
 #include "internal.h"
 

fs/proc/namespaces.c

@@ -9,7 +9,6 @@
 #include <linux/file.h>
 #include <linux/utsname.h>
 #include <net/net_namespace.h>
-#include <linux/mnt_namespace.h>
 #include <linux/ipc_namespace.h>
 #include <linux/pid_namespace.h>
 #include "internal.h"

security/tomoyo/realpath.c

@@ -5,6 +5,7 @@
  */
 
 #include "common.h"
+#include <linux/magic.h>
 
 /**
  * tomoyo_encode2 - Encode binary string to ascii string.