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fs/proc/task_mmu.c: update m->version in the main loop in m_start()

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Change the main loop in m_start() to update m->version. Mostly for
consistency, but this can help to avoid the same loop if the very
1st ->show() fails due to seq_overflow().

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 15:25:43 -07:00 committed by Linus Torvalds
parent b8c20a9b85
commit 557c2d8a73
1 changed files with 4 additions and 1 deletions
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5
fs/proc/task_mmu.c
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@ -184,11 +184,14 @@ static void *m_start(struct seq_file *m, loff_t *ppos)
m->version = 0;
if (pos < mm->map_count) {
for (vma = mm->mmap; pos; pos--)
for (vma = mm->mmap; pos; pos--) {
m->version = vma->vm_start;
vma = vma->vm_next;
}
return vma;
}
/* we do not bother to update m->version in this case */
if (pos == mm->map_count && priv->tail_vma)
return priv->tail_vma;