try_attach() should walk into the matching subdirectory, not the first one...
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| @@ -1680,43 +1680,45 @@ static __init int sysctl_init(void) · 1679 unmodified lines | ||
| 1680 | 1680 | |
| 1681 | 1681 | core_initcall(sysctl_init); |
| 1682 | 1682 | |
| 1683 | −static int is_branch_in(struct ctl_table *branch, struct ctl_table *table) | |
| 1683 | +static struct ctl_table *is_branch_in(struct ctl_table *branch, | |
| 1684 | + struct ctl_table *table) | |
| 1684 | 1685 | { |
| 1685 | 1686 | struct ctl_table *p; |
| 1686 | 1687 | const char *s = branch->procname; |
| 1687 | 1688 | |
| 1688 | 1689 | /* branch should have named subdirectory as its first element */ |
| 1689 | 1690 | if (!s || !branch->child) |
| 1690 | − return 0; | |
| 1691 | + return NULL; | |
| 1691 | 1692 | |
| 1692 | 1693 | /* ... and nothing else */ |
| 1693 | 1694 | if (branch[1].procname || branch[1].ctl_name) |
| 1694 | − return 0; | |
| 1695 | + return NULL; | |
| 1695 | 1696 | |
| 1696 | 1697 | /* table should contain subdirectory with the same name */ |
| 1697 | 1698 | for (p = table; p->procname || p->ctl_name; p++) { |
| 1698 | 1699 | if (!p->child) |
| 1699 | 1700 | continue; |
| 1700 | 1701 | if (p->procname && strcmp(p->procname, s) == 0) |
| 1701 | − return 1; | |
| 1702 | + return p; | |
| 1702 | 1703 | } |
| 1703 | − return 0; | |
| 1704 | + return NULL; | |
| 1704 | 1705 | } |
| 1705 | 1706 | |
| 1706 | 1707 | /* see if attaching q to p would be an improvement */ |
| 1707 | 1708 | static void try_attach(struct ctl_table_header *p, struct ctl_table_header *q) |
| 1708 | 1709 | { |
| 1709 | 1710 | struct ctl_table *to = p->ctl_table, *by = q->ctl_table; |
| 1711 | + struct ctl_table *next; | |
| 1710 | 1712 | int is_better = 0; |
| 1711 | 1713 | int not_in_parent = !p->attached_by; |
| 1712 | 1714 | |
| 1713 | − while (is_branch_in(by, to)) { | |
| 1715 | + while ((next = is_branch_in(by, to)) != NULL) { | |
| 1714 | 1716 | if (by == q->attached_by) |
| 1715 | 1717 | is_better = 1; |
| 1716 | 1718 | if (to == p->attached_by) |
| 1717 | 1719 | not_in_parent = 1; |
| 1718 | 1720 | by = by->child; |
| 1719 | − to = to->child; | |
| 1721 | + to = next->child; | |
| 1720 | 1722 | } |
| 1721 | 1723 | |
| 1722 | 1724 | if (is_better && not_in_parent) { |