Merge tag 'v4.4.109' into v4.4-rt

This is the 4.4.109 stable release

diff --cc Documentation/kernel-parameters.txt
Simple merge

diff --cc Makefile
Simple merge

diff --cc arch/x86/Kconfig
Simple merge

diff --cc arch/x86/kernel/reboot.c
Simple merge

diff --cc arch/x86/kvm/x86.c
Simple merge

diff --cc kernel/time/tick-sched.c
index d536824cbd369e8b6634ca8e529800a5d66c2bb6,e5d228f7224c91870805cdcf8561b3a3b4360661..45e9456da50fae210628b64b005e13c95c535d9a
--- 1/kernel/time/tick-sched.c
--- 2/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@@ -589,14 -583,24 +594,24 @@@ static ktime_t tick_nohz_stop_sched_tic
  
        /* Read jiffies and the time when jiffies were updated last */
        do {
 -              seq = read_seqbegin(&jiffies_lock);
 +              seq = read_seqcount_begin(&jiffies_seq);
                basemono = last_jiffies_update.tv64;
                basejiff = jiffies;
 -      } while (read_seqretry(&jiffies_lock, seq));
 +      } while (read_seqcount_retry(&jiffies_seq, seq));
        ts->last_jiffies = basejiff;
  
-       if (rcu_needs_cpu(basemono, &next_rcu) ||
-           arch_needs_cpu() || irq_work_needs_cpu()) {
+       /*
+        * Keep the periodic tick, when RCU, architecture or irq_work
+        * requests it.
+        * Aside of that check whether the local timer softirq is
+        * pending. If so its a bad idea to call get_next_timer_interrupt()
+        * because there is an already expired timer, so it will request
+        * immeditate expiry, which rearms the hardware timer with a
+        * minimal delta which brings us back to this place
+        * immediately. Lather, rinse and repeat...
+        */
+       if (rcu_needs_cpu(basemono, &next_rcu) || arch_needs_cpu() ||
+           irq_work_needs_cpu() || local_timer_softirq_pending()) {
                next_tick = basemono + TICK_NSEC;
        } else {
                /*

diff --cc kernel/trace/trace.c
Simple merge

diff --cc net/core/skbuff.c
Simple merge

diff --cc net/ipv4/tcp_ipv4.c
Simple merge