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authorAl Viro <viro@ZenIV.linux.org.uk>2008-07-27 06:31:22 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-27 09:45:34 -0700
commitbfbcf034798b2ca45338cee5049b5694b7ddc865 (patch)
tree51ca2687c318033b7a41533ecdfd2801a7241327 /kernel/sysctl.c
parent8be1a6d6c77ab4532e4476fdb8177030ef48b52c (diff)
lost sysctl fix
try_attach() should walk into the matching subdirectory, not the first one... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Tested-by: Valdis.Kletnieks@vt.edu Tested-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/sysctl.c')
-rw-r--r--kernel/sysctl.c16
1 files changed, 9 insertions, 7 deletions
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 911d846f050..fe471334727 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1680,43 +1680,45 @@ static __init int sysctl_init(void)
core_initcall(sysctl_init);
-static int is_branch_in(struct ctl_table *branch, struct ctl_table *table)
+static struct ctl_table *is_branch_in(struct ctl_table *branch,
+ struct ctl_table *table)
{
struct ctl_table *p;
const char *s = branch->procname;
/* branch should have named subdirectory as its first element */
if (!s || !branch->child)
- return 0;
+ return NULL;
/* ... and nothing else */
if (branch[1].procname || branch[1].ctl_name)
- return 0;
+ return NULL;
/* table should contain subdirectory with the same name */
for (p = table; p->procname || p->ctl_name; p++) {
if (!p->child)
continue;
if (p->procname && strcmp(p->procname, s) == 0)
- return 1;
+ return p;
}
- return 0;
+ return NULL;
}
/* see if attaching q to p would be an improvement */
static void try_attach(struct ctl_table_header *p, struct ctl_table_header *q)
{
struct ctl_table *to = p->ctl_table, *by = q->ctl_table;
+ struct ctl_table *next;
int is_better = 0;
int not_in_parent = !p->attached_by;
- while (is_branch_in(by, to)) {
+ while ((next = is_branch_in(by, to)) != NULL) {
if (by == q->attached_by)
is_better = 1;
if (to == p->attached_by)
not_in_parent = 1;
by = by->child;
- to = to->child;
+ to = next->child;
}
if (is_better && not_in_parent) {