Dump stack during sysctl registration failure

Let's make immediately obvious from where sysctl comes from and messages
itself more noticeable.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/kernel/sysctl_check.c b/kernel/sysctl_check.c
index ed6fe51df77ab53c5960df8b53024ae75120f3b2..5a2f2b2bf888de50e6ee3780d9a2b4cd991ee52a 100644 (file)
--- a/kernel/sysctl_check.c
+++ b/kernel/sysctl_check.c
@@ -1432,6 +1432,7 @@ static void set_fail(const char **fail, struct ctl_table *table, const char *str
                printk(KERN_ERR "sysctl table check failed: ");
                sysctl_print_path(table);
                printk(" %s\n", *fail);
+               dump_stack();
        }
        *fail = str;
 }