Message ID | 20220621204632.3370049-17-Liam.Howlett@oracle.com (mailing list archive) |
---|---|
State | New |
Headers | show
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Series |
Introducing the Maple Tree
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diff --git a/fs/proc/task_nommu.c b/fs/proc/task_nommu.c index a6d21fc0033c..2fd06f52b6a4 100644 --- a/fs/proc/task_nommu.c +++ b/fs/proc/task_nommu.c @@ -20,15 +20,13 @@ */ void task_mem(struct seq_file *m, struct mm_struct *mm) { + VMA_ITERATOR(vmi, mm, 0); struct vm_area_struct *vma; struct vm_region *region; - struct rb_node *p; unsigned long bytes = 0, sbytes = 0, slack = 0, size; - - mmap_read_lock(mm); - for (p = rb_first(&mm->mm_rb); p; p = rb_next(p)) { - vma = rb_entry(p, struct vm_area_struct, vm_rb); + mmap_read_lock(mm); + for_each_vma(vmi, vma) { bytes += kobjsize(vma); region = vma->vm_region; @@ -82,15 +80,13 @@ void task_mem(struct seq_file *m, struct mm_struct *mm) unsigned long task_vsize(struct mm_struct *mm) { + VMA_ITERATOR(vmi, mm, 0); struct vm_area_struct *vma; - struct rb_node *p; unsigned long vsize = 0; mmap_read_lock(mm); - for (p = rb_first(&mm->mm_rb); p; p = rb_next(p)) { - vma = rb_entry(p, struct vm_area_struct, vm_rb); + for_each_vma(vmi, vma) vsize += vma->vm_end - vma->vm_start; - } mmap_read_unlock(mm); return vsize; } @@ -99,14 +95,13 @@ unsigned long task_statm(struct mm_struct *mm, unsigned long *shared, unsigned long *text, unsigned long *data, unsigned long *resident) { + VMA_ITERATOR(vmi, mm, 0); struct vm_area_struct *vma; struct vm_region *region; - struct rb_node *p; unsigned long size = kobjsize(mm); mmap_read_lock(mm); - for (p = rb_first(&mm->mm_rb); p; p = rb_next(p)) { - vma = rb_entry(p, struct vm_area_struct, vm_rb); + for_each_vma(vmi, vma) { size += kobjsize(vma); region = vma->vm_region; if (region) { @@ -190,17 +185,19 @@ static int nommu_vma_show(struct seq_file *m, struct vm_area_struct *vma) */ static int show_map(struct seq_file *m, void *_p) { - struct rb_node *p = _p; - - return nommu_vma_show(m, rb_entry(p, struct vm_area_struct, vm_rb)); + return nommu_vma_show(m, _p); } static void *m_start(struct seq_file *m, loff_t *pos) { struct proc_maps_private *priv = m->private; struct mm_struct *mm; - struct rb_node *p; - loff_t n = *pos; + struct vm_area_struct *vma; + unsigned long addr = *pos; + + /* See m_next(). Zero at the start or after lseek. */ + if (addr == -1UL) + return NULL; /* pin the task and mm whilst we play with them */ priv->task = get_proc_task(priv->inode); @@ -216,10 +213,10 @@ static void *m_start(struct seq_file *m, loff_t *pos) return ERR_PTR(-EINTR); } - /* start from the Nth VMA */ - for (p = rb_first(&mm->mm_rb); p; p = rb_next(p)) - if (n-- == 0) - return p; + /* start the next element from addr */ + vma = find_vma(mm, addr); + if (vma) + return vma; mmap_read_unlock(mm); mmput(mm); @@ -242,10 +239,10 @@ static void m_stop(struct seq_file *m, void *_vml) static void *m_next(struct seq_file *m, void *_p, loff_t *pos) { - struct rb_node *p = _p; + struct vm_area_struct *vma = _p; - (*pos)++; - return p ? rb_next(p) : NULL; + *pos = vma->vm_end; + return find_vma(vma->vm_mm, vma->vm_end); } static const struct seq_operations proc_pid_maps_ops = {