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fs/proc/task_mmu.c: introduce m_next_vma() helper

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Extract the tail_vma/vm_next calculation from m_next() into the new
trivial helper, m_next_vma().

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Oleg Nesterov 2014-10-09 15:25:39 -07:00 committed by Linus Torvalds
parent 0c255321f8
commit ad2a00e4b7
1 changed files with 10 additions and 5 deletions
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15
fs/proc/task_mmu.c
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@ -138,6 +138,14 @@ static void vma_stop(struct proc_maps_private *priv)
mmput(mm);
}
static struct vm_area_struct *
m_next_vma(struct proc_maps_private *priv, struct vm_area_struct *vma)
{
if (vma == priv->tail_vma)
return NULL;
return vma->vm_next ?: priv->tail_vma;
}
static void *m_start(struct seq_file *m, loff_t *ppos)
{
struct proc_maps_private *priv = m->private;
@ -173,13 +181,10 @@ static void *m_start(struct seq_file *m, loff_t *ppos)
static void *m_next(struct seq_file *m, void *v, loff_t *pos)
{
struct proc_maps_private *priv = m->private;
struct vm_area_struct *tail_vma = priv->tail_vma;
struct vm_area_struct *vma = v, *next = NULL;
struct vm_area_struct *next;
(*pos)++;
if (vma != tail_vma)
next = vma->vm_next ?: tail_vma;
next = m_next_vma(priv, v);
if (!next)
vma_stop(priv);
return next;