From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: 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 Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior 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 --- kernel/fs/proc/nommu.c | 134 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 134 insertions(+) create mode 100644 kernel/fs/proc/nommu.c (limited to 'kernel/fs/proc/nommu.c') diff --git a/kernel/fs/proc/nommu.c b/kernel/fs/proc/nommu.c new file mode 100644 index 000000000..d4a35746c --- /dev/null +++ b/kernel/fs/proc/nommu.c @@ -0,0 +1,134 @@ +/* nommu.c: mmu-less memory info files + * + * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "internal.h" + +/* + * display a single region to a sequenced file + */ +static int nommu_region_show(struct seq_file *m, struct vm_region *region) +{ + unsigned long ino = 0; + struct file *file; + dev_t dev = 0; + int flags; + + flags = region->vm_flags; + file = region->vm_file; + + if (file) { + struct inode *inode = file_inode(region->vm_file); + dev = inode->i_sb->s_dev; + ino = inode->i_ino; + } + + seq_setwidth(m, 25 + sizeof(void *) * 6 - 1); + seq_printf(m, + "%08lx-%08lx %c%c%c%c %08llx %02x:%02x %lu ", + region->vm_start, + region->vm_end, + flags & VM_READ ? 'r' : '-', + flags & VM_WRITE ? 'w' : '-', + flags & VM_EXEC ? 'x' : '-', + flags & VM_MAYSHARE ? flags & VM_SHARED ? 'S' : 's' : 'p', + ((loff_t)region->vm_pgoff) << PAGE_SHIFT, + MAJOR(dev), MINOR(dev), ino); + + if (file) { + seq_pad(m, ' '); + seq_path(m, &file->f_path, ""); + } + + seq_putc(m, '\n'); + return 0; +} + +/* + * display a list of all the REGIONs the kernel knows about + * - nommu kernels have a single flat list + */ +static int nommu_region_list_show(struct seq_file *m, void *_p) +{ + struct rb_node *p = _p; + + return nommu_region_show(m, rb_entry(p, struct vm_region, vm_rb)); +} + +static void *nommu_region_list_start(struct seq_file *m, loff_t *_pos) +{ + struct rb_node *p; + loff_t pos = *_pos; + + down_read(&nommu_region_sem); + + for (p = rb_first(&nommu_region_tree); p; p = rb_next(p)) + if (pos-- == 0) + return p; + return NULL; +} + +static void nommu_region_list_stop(struct seq_file *m, void *v) +{ + up_read(&nommu_region_sem); +} + +static void *nommu_region_list_next(struct seq_file *m, void *v, loff_t *pos) +{ + (*pos)++; + return rb_next((struct rb_node *) v); +} + +static const struct seq_operations proc_nommu_region_list_seqop = { + .start = nommu_region_list_start, + .next = nommu_region_list_next, + .stop = nommu_region_list_stop, + .show = nommu_region_list_show +}; + +static int proc_nommu_region_list_open(struct inode *inode, struct file *file) +{ + return seq_open(file, &proc_nommu_region_list_seqop); +} + +static const struct file_operations proc_nommu_region_list_operations = { + .open = proc_nommu_region_list_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release, +}; + +static int __init proc_nommu_init(void) +{ + proc_create("maps", S_IRUGO, NULL, &proc_nommu_region_list_operations); + return 0; +} + +fs_initcall(proc_nommu_init); -- cgit 1.2.3-korg