debug_core: stop rcu warnings on kernel resume

When returning from the kernel debugger reset the rcu jiffies_stall
value to prevent the rcu stall detector from sending NMI events which
invoke a stack dump for each cpu in the system.

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>

diff --git a/kernel/debug/debug_core.c b/kernel/debug/debug_core.c
index c812857..5a3b04d 100644 (file)
--- a/kernel/debug/debug_core.c
+++ b/kernel/debug/debug_core.c
@@ -47,6 +47,7 @@
 #include <linux/pid.h>
 #include <linux/smp.h>
 #include <linux/mm.h>
+#include <linux/rcupdate.h>
 
 #include <asm/cacheflush.h>
 #include <asm/byteorder.h>
@@ -474,6 +475,7 @@ static void dbg_touch_watchdogs(void)
 {
        touch_softlockup_watchdog_sync();
        clocksource_touch_watchdog();
+       rcu_cpu_stall_reset();
 }
 
 static int kgdb_cpu_enter(struct kgdb_state *ks, struct pt_regs *regs)