proc: seqfile convert proc_pid_status to properly handle pid namespaces

Currently we possibly lookup the pid in the wrong pid namespace.  So
seq_file convert proc_pid_status which ensures the proper pid namespaces is
passed in.

[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: build fix]
[akpm@linux-foundation.org: another build fix]
[akpm@linux-foundation.org: s390 build fix]
[akpm@linux-foundation.org: fix task_name() output]
[akpm@linux-foundation.org: fix nommu build]
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: Andrew Morgan <morgan@kernel.org>
Cc: Serge Hallyn <serue@us.ibm.com>
Cc: Cedric Le Goater <clg@fr.ibm.com>
Cc: Pavel Emelyanov <xemul@openvz.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Paul Menage <menage@google.com>
Cc: Paul Jackson <pj@sgi.com>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 12 insertions, 12 deletions

diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c
index 1a2fdb6991df..a4d29025ddbd 100644
--- a/arch/s390/kernel/traps.c
+++ b/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>
@@ -218,41 +219,40 @@ void show_registers(struct pt_regs *regs)
 }	
 
 /* This is called from fs/proc/array.c */
-char *task_show_regs(struct task_struct *task, char *buffer)
+void task_show_regs(struct seq_file *m, struct task_struct *task)
 {
 	struct pt_regs *regs;
 
 	regs = task_pt_regs(task);
-	buffer += sprintf(buffer, "task: %p, ksp: %p\n",
+	seq_printf(m, "task: %p, ksp: %p\n",
 		       task, (void *)task->thread.ksp);
-	buffer += sprintf(buffer, "User PSW : %p %p\n",
+	seq_printf(m, "User PSW : %p %p\n",
 		       (void *) regs->psw.mask, (void *)regs->psw.addr);
 
-	buffer += sprintf(buffer, "User GPRS: " FOURLONG,
+	seq_printf(m, "User GPRS: " FOURLONG,
 			  regs->gprs[0], regs->gprs[1],
 			  regs->gprs[2], regs->gprs[3]);
-	buffer += sprintf(buffer, "           " FOURLONG,
+	seq_printf(m, "           " FOURLONG,
 			  regs->gprs[4], regs->gprs[5],
 			  regs->gprs[6], regs->gprs[7]);
-	buffer += sprintf(buffer, "           " FOURLONG,
+	seq_printf(m, "           " FOURLONG,
 			  regs->gprs[8], regs->gprs[9],
 			  regs->gprs[10], regs->gprs[11]);
-	buffer += sprintf(buffer, "           " FOURLONG,
+	seq_printf(m, "           " FOURLONG,
 			  regs->gprs[12], regs->gprs[13],
 			  regs->gprs[14], regs->gprs[15]);
-	buffer += sprintf(buffer, "User ACRS: %08x %08x %08x %08x\n",
+	seq_printf(m, "User ACRS: %08x %08x %08x %08x\n",
 			  task->thread.acrs[0], task->thread.acrs[1],
 			  task->thread.acrs[2], task->thread.acrs[3]);
-	buffer += sprintf(buffer, "           %08x %08x %08x %08x\n",
+	seq_printf(m, "           %08x %08x %08x %08x\n",
 			  task->thread.acrs[4], task->thread.acrs[5],
 			  task->thread.acrs[6], task->thread.acrs[7]);
-	buffer += sprintf(buffer, "           %08x %08x %08x %08x\n",
+	seq_printf(m, "           %08x %08x %08x %08x\n",
 			  task->thread.acrs[8], task->thread.acrs[9],
 			  task->thread.acrs[10], task->thread.acrs[11]);
-	buffer += sprintf(buffer, "           %08x %08x %08x %08x\n",
+	seq_printf(m, "           %08x %08x %08x %08x\n",
 			  task->thread.acrs[12], task->thread.acrs[13],
 			  task->thread.acrs[14], task->thread.acrs[15]);
-	return buffer;
 }
 
 static DEFINE_SPINLOCK(die_lock);