mirror of
https://github.com/torvalds/linux.git
synced 2025-11-04 10:40:15 +02:00
a1153636e9
Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code. Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com> Signed-off-by: Rich Felker <dalias@libc.org>
59 lines
1.4 KiB
C
59 lines
1.4 KiB
C
/*
|
|
* debugfs ops for process ASIDs
|
|
*
|
|
* Copyright (C) 2000, 2001 Paolo Alberelli
|
|
* Copyright (C) 2003 - 2008 Paul Mundt
|
|
* Copyright (C) 2003, 2004 Richard Curnow
|
|
*
|
|
* Provides a debugfs file that lists out the ASIDs currently associated
|
|
* with the processes.
|
|
*
|
|
* In the SH-5 case, if the DM.PC register is examined through the debug
|
|
* link, this shows ASID + PC. To make use of this, the PID->ASID
|
|
* relationship needs to be known. This is primarily for debugging.
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*/
|
|
#include <linux/init.h>
|
|
#include <linux/debugfs.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/sched/signal.h>
|
|
#include <linux/sched/task.h>
|
|
|
|
#include <asm/processor.h>
|
|
#include <asm/mmu_context.h>
|
|
|
|
static int asids_debugfs_show(struct seq_file *file, void *iter)
|
|
{
|
|
struct task_struct *p;
|
|
|
|
read_lock(&tasklist_lock);
|
|
|
|
for_each_process(p) {
|
|
int pid = p->pid;
|
|
|
|
if (unlikely(!pid))
|
|
continue;
|
|
|
|
if (p->mm)
|
|
seq_printf(file, "%5d : %04lx\n", pid,
|
|
cpu_asid(smp_processor_id(), p->mm));
|
|
}
|
|
|
|
read_unlock(&tasklist_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
DEFINE_SHOW_ATTRIBUTE(asids_debugfs);
|
|
|
|
static int __init asids_debugfs_init(void)
|
|
{
|
|
debugfs_create_file("asids", S_IRUSR, arch_debugfs_dir, NULL,
|
|
&asids_debugfs_fops);
|
|
return 0;
|
|
}
|
|
device_initcall(asids_debugfs_init);
|