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[PATCH] Bug in MM_RB debugging 

The code is seemingly trying to make sure that rb_next() brings us to
successive increasing vma entries.

But the two variables, prev and pend, used to perform these checks, are
never advanced.

Signed-off-by: David S. Miller <davem@davemloft.net>
Cc: Andrea Arcangeli <andrea@novell.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
David Miller 2007-02-28 20:13:13 -08:00 committed by Linus Torvalds
parent 04a51e66ad
commit d1af65d13f
1 changed files with 2 additions and 0 deletions
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2
mm/mmap.c
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@ -299,6 +299,8 @@ static int browse_rb(struct rb_root *root)
printk("vm_end %lx < vm_start %lx\n", vma->vm_end, vma->vm_start); printk("vm_end %lx < vm_start %lx\n", vma->vm_end, vma->vm_start);
i++; i++;
pn = nd; pn = nd;
prev = vma->vm_start;
pend = vma->vm_end;
} }
j = 0; j = 0;
for (nd = pn; nd; nd = rb_prev(nd)) { for (nd = pn; nd; nd = rb_prev(nd)) {