x86, NMI: Add back unknown_nmi_panic and nmi_watchdog sysctls

Originally adapted from Huang Ying's patch which moved the
unknown_nmi_panic to the traps.c file.  Because the old nmi
watchdog was deleted before this change happened, the
unknown_nmi_panic sysctl was lost.  This re-adds it.

Also, the nmi_watchdog sysctl was re-implemented and its
documentation updated accordingly.

Patch-inspired-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Don Zickus <dzickus@redhat.com>
Reviewed-by: Cyrill Gorcunov <gorcunov@gmail.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Cc: fweisbec@gmail.com
LKML-Reference: <1291068437-5331-3-git-send-email-dzickus@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 16 insertions, 0 deletions

diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index cbd97da7a613..46404414d8a7 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -745,6 +745,22 @@ static struct ctl_table kern_table[] = {
                 .extra1         = &zero,
                 .extra2         = &one,
         },
+        {
+                .procname       = "nmi_watchdog",
+                .data           = &watchdog_enabled,
+                .maxlen         = sizeof (int),
+                .mode           = 0644,
+                .proc_handler   = proc_dowatchdog_enabled,
+        },
+#endif
+#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86)
+        {
+                .procname       = "unknown_nmi_panic",
+                .data           = &unknown_nmi_panic,
+                .maxlen         = sizeof (int),
+                .mode           = 0644,
+                .proc_handler   = proc_dointvec,
+        },
 #endif
 #if defined(CONFIG_X86)
         {