[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/fs/proc/nommu.c b/ap/os/linux/linux-3.4.x/fs/proc/nommu.c
new file mode 100644
index 0000000..b1822dd
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/fs/proc/nommu.c
@@ -0,0 +1,136 @@
+/* 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 <linux/init.h>
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/time.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/mman.h>
+#include <linux/proc_fs.h>
+#include <linux/mm.h>
+#include <linux/mmzone.h>
+#include <linux/pagemap.h>
+#include <linux/swap.h>
+#include <linux/smp.h>
+#include <linux/seq_file.h>
+#include <linux/hugetlb.h>
+#include <linux/vmalloc.h>
+#include <asm/uaccess.h>
+#include <asm/pgtable.h>
+#include <asm/tlb.h>
+#include <asm/div64.h>
+#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, len;
+
+ flags = region->vm_flags;
+ file = region->vm_file;
+
+ if (file) {
+ struct inode *inode = region->vm_file->f_path.dentry->d_inode;
+ dev = inode->i_sb->s_dev;
+ ino = inode->i_ino;
+ }
+
+ seq_printf(m,
+ "%08lx-%08lx %c%c%c%c %08llx %02x:%02x %lu %n",
+ 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, &len);
+
+ if (file) {
+ len = 25 + sizeof(void *) * 6 - len;
+ if (len < 1)
+ len = 1;
+ seq_printf(m, "%*c", len, ' ');
+ 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;
+}
+
+module_init(proc_nommu_init);