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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/sh/mm/asids-debugfs.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/sh/mm/asids-debugfs.c')
-rw-r--r-- | kernel/arch/sh/mm/asids-debugfs.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/kernel/arch/sh/mm/asids-debugfs.c b/kernel/arch/sh/mm/asids-debugfs.c new file mode 100644 index 000000000..ecfc6b0c1 --- /dev/null +++ b/kernel/arch/sh/mm/asids-debugfs.c @@ -0,0 +1,75 @@ +/* + * 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/module.h> +#include <linux/debugfs.h> +#include <linux/seq_file.h> +#include <linux/spinlock.h> +#include <asm/processor.h> +#include <asm/mmu_context.h> + +static int asids_seq_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; +} + +static int asids_debugfs_open(struct inode *inode, struct file *file) +{ + return single_open(file, asids_seq_show, inode->i_private); +} + +static const struct file_operations asids_debugfs_fops = { + .owner = THIS_MODULE, + .open = asids_debugfs_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static int __init asids_debugfs_init(void) +{ + struct dentry *asids_dentry; + + asids_dentry = debugfs_create_file("asids", S_IRUSR, arch_debugfs_dir, + NULL, &asids_debugfs_fops); + if (!asids_dentry) + return -ENOMEM; + + return PTR_ERR_OR_ZERO(asids_dentry); +} +module_init(asids_debugfs_init); + +MODULE_LICENSE("GPL v2"); |