Commit 557c2d8a authored Oct 09, 2014 by Oleg Nesterov Committed by Linus Torvalds Oct 09, 2014

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

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>

parent b8c20a9b

fs/proc/task_mmu.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -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;