1 files changed, 87 insertions, 33 deletions

diff --git a/fs/proc/task_nommu.c b/fs/proc/task_nommu.c
index d4a8be32b902..343ea1216bc8 100644
--- a/fs/proc/task_nommu.c
+++ b/fs/proc/task_nommu.c
@@ -15,25 +15,32 @@
  */
 void task_mem(struct seq_file *m, struct mm_struct *mm)
 {
-        struct vm_list_struct *vml;
-        unsigned long bytes = 0, sbytes = 0, slack = 0;
+        struct vm_area_struct *vma;
+        struct vm_region *region;
+        struct rb_node *p;
+        unsigned long bytes = 0, sbytes = 0, slack = 0, size;
         
         down_read(&mm->mmap_sem);
-        for (vml = mm->context.vmlist; vml; vml = vml->next) {
-                if (!vml->vma)
-                        continue;
+        for (p = rb_first(&mm->mm_rb); p; p = rb_next(p)) {
+                vma = rb_entry(p, struct vm_area_struct, vm_rb);
+
+                bytes += kobjsize(vma);
+
+                region = vma->vm_region;
+                if (region) {
+                        size = kobjsize(region);
+                        size += region->vm_end - region->vm_start;
+                } else {
+                        size = vma->vm_end - vma->vm_start;
+                }
 
-                bytes += kobjsize(vml);
                 if (atomic_read(&mm->mm_count) > 1 ||
-                    atomic_read(&vml->vma->vm_usage) > 1
-                    ) {
-                        sbytes += kobjsize((void *) vml->vma->vm_start);
-                        sbytes += kobjsize(vml->vma);
+                    vma->vm_flags & VM_MAYSHARE) {
+                        sbytes += size;
                 } else {
-                        bytes += kobjsize((void *) vml->vma->vm_start);
-                        bytes += kobjsize(vml->vma);
-                        slack += kobjsize((void *) vml->vma->vm_start) -
-                                (vml->vma->vm_end - vml->vma->vm_start);
+                        bytes += size;
+                        if (region)
+                                slack = region->vm_end - vma->vm_end;
                 }
         }
 
@@ -70,13 +77,14 @@ void task_mem(struct seq_file *m, struct mm_struct *mm)
 
 unsigned long task_vsize(struct mm_struct *mm)
 {
-        struct vm_list_struct *tbp;
+        struct vm_area_struct *vma;
+        struct rb_node *p;
         unsigned long vsize = 0;
 
         down_read(&mm->mmap_sem);
-        for (tbp = mm->context.vmlist; tbp; tbp = tbp->next) {
-                if (tbp->vma)
-                        vsize += kobjsize((void *) tbp->vma->vm_start);
+        for (p = rb_first(&mm->mm_rb); p; p = rb_next(p)) {
+                vma = rb_entry(p, struct vm_area_struct, vm_rb);
+                vsize += vma->vm_end - vma->vm_start;
         }
         up_read(&mm->mmap_sem);
         return vsize;
@@ -85,15 +93,19 @@ unsigned long task_vsize(struct mm_struct *mm)
 int task_statm(struct mm_struct *mm, int *shared, int *text,
                int *data, int *resident)
 {
-        struct vm_list_struct *tbp;
+        struct vm_area_struct *vma;
+        struct vm_region *region;
+        struct rb_node *p;
         int size = kobjsize(mm);
 
         down_read(&mm->mmap_sem);
-        for (tbp = mm->context.vmlist; tbp; tbp = tbp->next) {
-                size += kobjsize(tbp);
-                if (tbp->vma) {
-                        size += kobjsize(tbp->vma);
-                        size += kobjsize((void *) tbp->vma->vm_start);
+        for (p = rb_first(&mm->mm_rb); p; p = rb_next(p)) {
+                vma = rb_entry(p, struct vm_area_struct, vm_rb);
+                size += kobjsize(vma);
+                region = vma->vm_region;
+                if (region) {
+                        size += kobjsize(region);
+                        size += region->vm_end - region->vm_start;
                 }
         }
 
@@ -105,20 +117,62 @@ int task_statm(struct mm_struct *mm, int *shared, int *text,
 }
 
 /*
+ * display a single VMA to a sequenced file
+ */
+static int nommu_vma_show(struct seq_file *m, struct vm_area_struct *vma)
+{
+        unsigned long ino = 0;
+        struct file *file;
+        dev_t dev = 0;
+        int flags, len;
+
+        flags = vma->vm_flags;
+        file = vma->vm_file;
+
+        if (file) {
+                struct inode *inode = vma->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 %08lx %02x:%02x %lu %n",
+                   vma->vm_start,
+                   vma->vm_end,
+                   flags & VM_READ ? 'r' : '-',
+                   flags & VM_WRITE ? 'w' : '-',
+                   flags & VM_EXEC ? 'x' : '-',
+                   flags & VM_MAYSHARE ? flags & VM_SHARED ? 'S' : 's' : 'p',
+                   vma->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 mapping lines for a particular process's /proc/pid/maps
  */
-static int show_map(struct seq_file *m, void *_vml)
+static int show_map(struct seq_file *m, void *_p)
 {
-        struct vm_list_struct *vml = _vml;
+        struct rb_node *p = _p;
 
-        return nommu_vma_show(m, vml->vma);
+        return nommu_vma_show(m, rb_entry(p, struct vm_area_struct, vm_rb));
 }
 
 static void *m_start(struct seq_file *m, loff_t *pos)
 {
         struct proc_maps_private *priv = m->private;
-        struct vm_list_struct *vml;
         struct mm_struct *mm;
+        struct rb_node *p;
         loff_t n = *pos;
 
         /* pin the task and mm whilst we play with them */
@@ -134,9 +188,9 @@ static void *m_start(struct seq_file *m, loff_t *pos)
         }
 
         /* start from the Nth VMA */
-        for (vml = mm->context.vmlist; vml; vml = vml->next)
+        for (p = rb_first(&mm->mm_rb); p; p = rb_next(p))
                 if (n-- == 0)
-                        return vml;
+                        return p;
         return NULL;
 }
 
@@ -152,12 +206,12 @@ static void m_stop(struct seq_file *m, void *_vml)
         }
 }
 
-static void *m_next(struct seq_file *m, void *_vml, loff_t *pos)
+static void *m_next(struct seq_file *m, void *_p, loff_t *pos)
 {
-        struct vm_list_struct *vml = _vml;
+        struct rb_node *p = _p;
 
         (*pos)++;
-        return vml ? vml->next : NULL;
+        return p ? rb_next(p) : NULL;
 }
 
 static const struct seq_operations proc_pid_maps_ops = {