12 files changed, 64 insertions, 57 deletions

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 7ccba4bc5e3b..ca83b73fba19 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -703,7 +703,7 @@ static int cgroup_mkdir(struct inode *dir, struct dentry *dentry, int mode);
 static int cgroup_rmdir(struct inode *unused_dir, struct dentry *dentry);
 static int cgroup_populate_dir(struct cgroup *cgrp);
 static const struct inode_operations cgroup_dir_inode_operations;
-static struct file_operations proc_cgroupstats_operations;
+static const struct file_operations proc_cgroupstats_operations;
 
 static struct backing_dev_info cgroup_backing_dev_info = {
         .name           = "cgroup",
@@ -1863,7 +1863,7 @@ static int cgroup_seqfile_release(struct inode *inode, struct file *file)
         return single_release(inode, file);
 }
 
-static struct file_operations cgroup_seqfile_operations = {
+static const struct file_operations cgroup_seqfile_operations = {
         .read = seq_read,
         .write = cgroup_file_write,
         .llseek = seq_lseek,
@@ -1922,7 +1922,7 @@ static int cgroup_rename(struct inode *old_dir, struct dentry *old_dentry,
         return simple_rename(old_dir, old_dentry, new_dir, new_dentry);
 }
 
-static struct file_operations cgroup_file_operations = {
+static const struct file_operations cgroup_file_operations = {
         .read = cgroup_file_read,
         .write = cgroup_file_write,
         .llseek = generic_file_llseek,
@@ -3369,7 +3369,7 @@ static int cgroup_open(struct inode *inode, struct file *file)
         return single_open(file, proc_cgroup_show, pid);
 }
 
-struct file_operations proc_cgroup_operations = {
+const struct file_operations proc_cgroup_operations = {
         .open           = cgroup_open,
         .read           = seq_read,
         .llseek         = seq_lseek,
@@ -3398,7 +3398,7 @@ static int cgroupstats_open(struct inode *inode, struct file *file)
         return single_open(file, proc_cgroupstats_show, NULL);
 }
 
-static struct file_operations proc_cgroupstats_operations = {
+static const struct file_operations proc_cgroupstats_operations = {
         .open = cgroupstats_open,
         .read = seq_read,
         .llseek = seq_lseek,
@@ -3708,8 +3708,10 @@ static void check_for_release(struct cgroup *cgrp)
 void __css_put(struct cgroup_subsys_state *css)
 {
         struct cgroup *cgrp = css->cgroup;
+        int val;
         rcu_read_lock();
-        if (atomic_dec_return(&css->refcnt) == 1) {
+        val = atomic_dec_return(&css->refcnt);
+        if (val == 1) {
                 if (notify_on_release(cgrp)) {
                         set_bit(CGRP_RELEASABLE, &cgrp->flags);
                         check_for_release(cgrp);
@@ -3717,6 +3719,7 @@ void __css_put(struct cgroup_subsys_state *css)
                 cgroup_wakeup_rmdir_waiter(cgrp);
         }
         rcu_read_unlock();
+        WARN_ON_ONCE(val < 1);
 }
 
 /*
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index e5d98ce50f89..6d7020490f94 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -509,13 +509,14 @@ static inline int hrtimer_hres_active(void)
  * next event
  * Called with interrupts disabled and base->lock held
  */
-static void hrtimer_force_reprogram(struct hrtimer_cpu_base *cpu_base)
+static void
+hrtimer_force_reprogram(struct hrtimer_cpu_base *cpu_base, int skip_equal)
 {
         int i;
         struct hrtimer_clock_base *base = cpu_base->clock_base;
-        ktime_t expires;
+        ktime_t expires, expires_next;
 
-        cpu_base->expires_next.tv64 = KTIME_MAX;
+        expires_next.tv64 = KTIME_MAX;
 
         for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++, base++) {
                 struct hrtimer *timer;
@@ -531,10 +532,15 @@ static void hrtimer_force_reprogram(struct hrtimer_cpu_base *cpu_base)
                  */
                 if (expires.tv64 < 0)
                         expires.tv64 = 0;
-                if (expires.tv64 < cpu_base->expires_next.tv64)
-                        cpu_base->expires_next = expires;
+                if (expires.tv64 < expires_next.tv64)
+                        expires_next = expires;
         }
 
+        if (skip_equal && expires_next.tv64 == cpu_base->expires_next.tv64)
+                return;
+
+        cpu_base->expires_next.tv64 = expires_next.tv64;
+
         if (cpu_base->expires_next.tv64 != KTIME_MAX)
                 tick_program_event(cpu_base->expires_next, 1);
 }
@@ -617,7 +623,7 @@ static void retrigger_next_event(void *arg)
         base->clock_base[CLOCK_REALTIME].offset =
                 timespec_to_ktime(realtime_offset);
 
-        hrtimer_force_reprogram(base);
+        hrtimer_force_reprogram(base, 0);
         spin_unlock(&base->lock);
 }
 
@@ -730,7 +736,8 @@ static int hrtimer_switch_to_hres(void)
 static inline int hrtimer_hres_active(void) { return 0; }
 static inline int hrtimer_is_hres_enabled(void) { return 0; }
 static inline int hrtimer_switch_to_hres(void) { return 0; }
-static inline void hrtimer_force_reprogram(struct hrtimer_cpu_base *base) { }
+static inline void
+hrtimer_force_reprogram(struct hrtimer_cpu_base *base, int skip_equal) { }
 static inline int hrtimer_enqueue_reprogram(struct hrtimer *timer,
                                             struct hrtimer_clock_base *base,
                                             int wakeup)
@@ -873,19 +880,29 @@ static void __remove_hrtimer(struct hrtimer *timer,
                              struct hrtimer_clock_base *base,
                              unsigned long newstate, int reprogram)
 {
-        if (timer->state & HRTIMER_STATE_ENQUEUED) {
-                /*
-                 * Remove the timer from the rbtree and replace the
-                 * first entry pointer if necessary.
-                 */
-                if (base->first == &timer->node) {
-                        base->first = rb_next(&timer->node);
-                        /* Reprogram the clock event device. if enabled */
-                        if (reprogram && hrtimer_hres_active())
-                                hrtimer_force_reprogram(base->cpu_base);
+        if (!(timer->state & HRTIMER_STATE_ENQUEUED))
+                goto out;
+
+        /*
+         * Remove the timer from the rbtree and replace the first
+         * entry pointer if necessary.
+         */
+        if (base->first == &timer->node) {
+                base->first = rb_next(&timer->node);
+#ifdef CONFIG_HIGH_RES_TIMERS
+                /* Reprogram the clock event device. if enabled */
+                if (reprogram && hrtimer_hres_active()) {
+                        ktime_t expires;
+
+                        expires = ktime_sub(hrtimer_get_expires(timer),
+                                            base->offset);
+                        if (base->cpu_base->expires_next.tv64 == expires.tv64)
+                                hrtimer_force_reprogram(base->cpu_base, 1);
                 }
-                rb_erase(&timer->node, &base->active);
+#endif
         }
+        rb_erase(&timer->node, &base->active);
+out:
         timer->state = newstate;
 }
 
diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index cfadc1291d0b..5240d75f4c60 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -1333,7 +1333,7 @@ static int __kprobes kprobes_open(struct inode *inode, struct file *filp)
         return seq_open(filp, &kprobes_seq_ops);
 }
 
-static struct file_operations debugfs_kprobes_operations = {
+static const struct file_operations debugfs_kprobes_operations = {
         .open           = kprobes_open,
         .read           = seq_read,
         .llseek         = seq_lseek,
@@ -1515,7 +1515,7 @@ static ssize_t write_enabled_file_bool(struct file *file,
         return count;
 }
 
-static struct file_operations fops_kp = {
+static const struct file_operations fops_kp = {
         .read =         read_enabled_file_bool,
         .write =        write_enabled_file_bool,
 };
diff --git a/kernel/module.c b/kernel/module.c
index fe748a86d452..8b7d8805819d 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -1992,12 +1992,14 @@ static inline unsigned long layout_symtab(struct module *mod,
                                           Elf_Shdr *sechdrs,
                                           unsigned int symindex,
                                           unsigned int strindex,
-                                          const Elf_Hdr *hdr,
+                                          const Elf_Ehdr *hdr,
                                           const char *secstrings,
                                           unsigned long *pstroffs,
                                           unsigned long *strmap)
 {
+        return 0;
 }
+
 static inline void add_kallsyms(struct module *mod,
                                 Elf_Shdr *sechdrs,
                                 unsigned int shnum,
@@ -2081,9 +2083,8 @@ static noinline struct module *load_module(void __user *umod,
         struct module *mod;
         long err = 0;
         void *percpu = NULL, *ptr = NULL; /* Stops spurious gcc warning */
-#ifdef CONFIG_KALLSYMS
         unsigned long symoffs, stroffs, *strmap;
-#endif
+
         mm_segment_t old_fs;
 
         DEBUGP("load_module: umod=%p, len=%lu, uargs=%p\n",
diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index 76ac4db405e9..0f86feb6db0c 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -2253,7 +2253,7 @@ static void perf_mmap_close(struct vm_area_struct *vma)
         }
 }
 
-static struct vm_operations_struct perf_mmap_vmops = {
+static const struct vm_operations_struct perf_mmap_vmops = {
         .open           = perf_mmap_open,
         .close          = perf_mmap_close,
         .fault          = perf_mmap_fault,
diff --git a/kernel/rcutree_trace.c b/kernel/rcutree_trace.c
index c89f5e9fd173..179e6ad80dc0 100644
--- a/kernel/rcutree_trace.c
+++ b/kernel/rcutree_trace.c
@@ -93,7 +93,7 @@ static int rcudata_open(struct inode *inode, struct file *file)
         return single_open(file, show_rcudata, NULL);
 }
 
-static struct file_operations rcudata_fops = {
+static const struct file_operations rcudata_fops = {
         .owner = THIS_MODULE,
         .open = rcudata_open,
         .read = seq_read,
@@ -145,7 +145,7 @@ static int rcudata_csv_open(struct inode *inode, struct file *file)
         return single_open(file, show_rcudata_csv, NULL);
 }
 
-static struct file_operations rcudata_csv_fops = {
+static const struct file_operations rcudata_csv_fops = {
         .owner = THIS_MODULE,
         .open = rcudata_csv_open,
         .read = seq_read,
@@ -196,7 +196,7 @@ static int rcuhier_open(struct inode *inode, struct file *file)
         return single_open(file, show_rcuhier, NULL);
 }
 
-static struct file_operations rcuhier_fops = {
+static const struct file_operations rcuhier_fops = {
         .owner = THIS_MODULE,
         .open = rcuhier_open,
         .read = seq_read,
@@ -222,7 +222,7 @@ static int rcugp_open(struct inode *inode, struct file *file)
         return single_open(file, show_rcugp, NULL);
 }
 
-static struct file_operations rcugp_fops = {
+static const struct file_operations rcugp_fops = {
         .owner = THIS_MODULE,
         .open = rcugp_open,
         .read = seq_read,
@@ -276,7 +276,7 @@ static int rcu_pending_open(struct inode *inode, struct file *file)
         return single_open(file, show_rcu_pending, NULL);
 }
 
-static struct file_operations rcu_pending_fops = {
+static const struct file_operations rcu_pending_fops = {
         .owner = THIS_MODULE,
         .open = rcu_pending_open,
         .read = seq_read,
diff --git a/kernel/relay.c b/kernel/relay.c
index bc188549788f..760c26209a3c 100644
--- a/kernel/relay.c
+++ b/kernel/relay.c
@@ -60,7 +60,7 @@ static int relay_buf_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 /*
  * vm_ops for relay file mappings.
  */
-static struct vm_operations_struct relay_file_mmap_ops = {
+static const struct vm_operations_struct relay_file_mmap_ops = {
         .fault = relay_buf_fault,
         .close = relay_file_mmap_close,
 };
diff --git a/kernel/res_counter.c b/kernel/res_counter.c
index 88faec23e833..bcdabf37c40b 100644
--- a/kernel/res_counter.c
+++ b/kernel/res_counter.c
@@ -37,27 +37,17 @@ int res_counter_charge_locked(struct res_counter *counter, unsigned long val)
 }
 
 int res_counter_charge(struct res_counter *counter, unsigned long val,
-                        struct res_counter **limit_fail_at,
-                        struct res_counter **soft_limit_fail_at)
+                        struct res_counter **limit_fail_at)
 {
         int ret;
         unsigned long flags;
         struct res_counter *c, *u;
 
         *limit_fail_at = NULL;
-        if (soft_limit_fail_at)
-                *soft_limit_fail_at = NULL;
         local_irq_save(flags);
         for (c = counter; c != NULL; c = c->parent) {
                 spin_lock(&c->lock);
                 ret = res_counter_charge_locked(c, val);
-                /*
-                 * With soft limits, we return the highest ancestor
-                 * that exceeds its soft limit
-                 */
-                if (soft_limit_fail_at &&
-                        !res_counter_soft_limit_check_locked(c))
-                        *soft_limit_fail_at = c;
                 spin_unlock(&c->lock);
                 if (ret < 0) {
                         *limit_fail_at = c;
@@ -85,8 +75,7 @@ void res_counter_uncharge_locked(struct res_counter *counter, unsigned long val)
         counter->usage -= val;
 }
 
-void res_counter_uncharge(struct res_counter *counter, unsigned long val,
-                                bool *was_soft_limit_excess)
+void res_counter_uncharge(struct res_counter *counter, unsigned long val)
 {
         unsigned long flags;
         struct res_counter *c;
@@ -94,9 +83,6 @@ void res_counter_uncharge(struct res_counter *counter, unsigned long val,
         local_irq_save(flags);
         for (c = counter; c != NULL; c = c->parent) {
                 spin_lock(&c->lock);
-                if (was_soft_limit_excess)
-                        *was_soft_limit_excess =
-                                !res_counter_soft_limit_check_locked(c);
                 res_counter_uncharge_locked(c, val);
                 spin_unlock(&c->lock);
         }
diff --git a/kernel/sched.c b/kernel/sched.c
index ee61f454a98b..1535f3884b88 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -780,7 +780,7 @@ static int sched_feat_open(struct inode *inode, struct file *filp)
         return single_open(filp, sched_feat_show, NULL);
 }
 
-static struct file_operations sched_feat_fops = {
+static const struct file_operations sched_feat_fops = {
         .open           = sched_feat_open,
         .write          = sched_feat_write,
         .read           = seq_read,
diff --git a/kernel/sched_clock.c b/kernel/sched_clock.c
index ac2e1dc708bd..479ce5682d7c 100644
--- a/kernel/sched_clock.c
+++ b/kernel/sched_clock.c
@@ -127,7 +127,7 @@ again:
         clock = wrap_max(clock, min_clock);
         clock = wrap_min(clock, max_clock);
 
-        if (cmpxchg(&scd->clock, old_clock, clock) != old_clock)
+        if (cmpxchg64(&scd->clock, old_clock, clock) != old_clock)
                 goto again;
 
         return clock;
@@ -163,7 +163,7 @@ again:
                 val = remote_clock;
         }
 
-        if (cmpxchg(ptr, old_val, val) != old_val)
+        if (cmpxchg64(ptr, old_val, val) != old_val)
                 goto again;
 
         return val;
diff --git a/kernel/time/timer_list.c b/kernel/time/timer_list.c
index fddd69d16e03..1b5b7aa2fdfd 100644
--- a/kernel/time/timer_list.c
+++ b/kernel/time/timer_list.c
@@ -275,7 +275,7 @@ static int timer_list_open(struct inode *inode, struct file *filp)
         return single_open(filp, timer_list_show, NULL);
 }
 
-static struct file_operations timer_list_fops = {
+static const struct file_operations timer_list_fops = {
         .open           = timer_list_open,
         .read           = seq_read,
         .llseek         = seq_lseek,
diff --git a/kernel/time/timer_stats.c b/kernel/time/timer_stats.c
index 4cde8b9c716f..ee5681f8d7ec 100644
--- a/kernel/time/timer_stats.c
+++ b/kernel/time/timer_stats.c
@@ -395,7 +395,7 @@ static int tstats_open(struct inode *inode, struct file *filp)
         return single_open(filp, tstats_show, NULL);
 }
 
-static struct file_operations tstats_fops = {
+static const struct file_operations tstats_fops = {
         .open           = tstats_open,
         .read           = seq_read,
         .write          = tstats_write,