sysctl: allow embedded targets to disable sysctl_check.c

Disable sysctl_check.c for embedded targets. This saves about about 11 kB
in .text and another 11 kB in .data on a PXA255 embedded platform.

Signed-off-by: Holger Schurig <hs4233@mail.mn-solutions.de>
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>

1 files changed, 8 insertions, 2 deletions

diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 0a1d2733cf41..1cdfe942d160 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1592,9 +1592,13 @@ static void sysctl_set_parent(struct ctl_table *parent, struct ctl_table *table)
 
 static __init int sysctl_init(void)
 {
-        int err;
         sysctl_set_parent(NULL, root_table);
-        err = sysctl_check_table(current->nsproxy, root_table);
+#ifdef CONFIG_SYSCTL_SYSCALL_CHECK
+        {
+                int err;
+                err = sysctl_check_table(current->nsproxy, root_table);
+        }
+#endif
         return 0;
 }
 
@@ -1721,10 +1725,12 @@ struct ctl_table_header *__register_sysctl_paths(
         header->unregistering = NULL;
         header->root = root;
         sysctl_set_parent(NULL, header->ctl_table);
+#ifdef CONFIG_SYSCTL_SYSCALL_CHECK
         if (sysctl_check_table(namespaces, header->ctl_table)) {
                 kfree(header);
                 return NULL;
         }
+#endif
         spin_lock(&sysctl_lock);
         header_list = lookup_header_list(root, namespaces);
         list_add_tail(&header->ctl_entry, header_list);