From: Andrew Morton <akpm@linux-foundation.org>

In file included from include/asm/thread_info.h:39,
                 from include/linux/thread_info.h:21,
                 from include/linux/preempt.h:9,
                 from include/linux/spinlock.h:49,
                 from include/linux/seqlock.h:29,
                 from include/linux/time.h:8,
                 from include/linux/timex.h:57,
                 from include/linux/sched.h:53,
                 from arch/s390/kernel/asm-offsets.c:7:
include/asm/processor.h:184: warning: 'struct seq_file' declared inside parameter list
include/asm/processor.h:184: warning: its scope is only this definition or declaration, which is probably not what you want

arch/s390/kernel/traps.c: In function 'task_show_regs':
arch/s390/kernel/traps.c:226: error: implicit declaration of function 'seq_printf'

Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 arch/s390/kernel/traps.c     |    1 +
 include/asm-s390/processor.h |    1 +
 2 files changed, 2 insertions(+)

diff -puN arch/s390/kernel/traps.c~proc-seqfile-convert-proc_pid_status-to-properly-handle-pid-namespaces-fix-2 arch/s390/kernel/traps.c
--- a/arch/s390/kernel/traps.c~proc-seqfile-convert-proc_pid_status-to-properly-handle-pid-namespaces-fix-2
+++ a/arch/s390/kernel/traps.c
@@ -24,6 +24,7 @@
 #include <linux/smp.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
+#include <linux/seq_file.h>
 #include <linux/delay.h>
 #include <linux/module.h>
 #include <linux/kdebug.h>
diff -puN include/asm-s390/processor.h~proc-seqfile-convert-proc_pid_status-to-properly-handle-pid-namespaces-fix-2 include/asm-s390/processor.h
--- a/include/asm-s390/processor.h~proc-seqfile-convert-proc_pid_status-to-properly-handle-pid-namespaces-fix-2
+++ a/include/asm-s390/processor.h
@@ -161,6 +161,7 @@ struct stack_frame {
 /* Forward declaration, a strange C thing */
 struct task_struct;
 struct mm_struct;
+struct seq_file;
 
 /* Free all resources held by a thread. */
 extern void release_thread(struct task_struct *);
_