Merge tag 'v3.15-rc1' into patchwork

Linux 3.15-rc1

* tag 'v3.15-rc1': (12180 commits)
  Linux 3.15-rc1
  mm: Initialize error in shmem_file_aio_read()
  cifs: Use min_t() when comparing "size_t" and "unsigned long"
  sym53c8xx_2: Set DID_REQUEUE return code when aborting squeue
  powerpc: Don't try to set LPCR unless we're in hypervisor mode
  futex: update documentation for ordering guarantees
  ceph: fix pr_fmt() redefinition
  vti: don't allow to add the same tunnel twice
  gre: don't allow to add the same tunnel twice
  drivers: net: xen-netfront: fix array initialization bug
  missing bits of "splice: fix racy pipe->buffers uses"
  cifs: fix the race in cifs_writev()
  ceph_sync_{,direct_}write: fix an oops on ceph_osdc_new_request() failure
  pktgen: be friendly to LLTX devices
  r8152: check RTL8152_UNPLUG
  net: sun4i-emac: add promiscuous support
  net/apne: replace IS_ERR and PTR_ERR with PTR_ERR_OR_ZERO
  blackfin: cleanup board files
  bf609: clock: drop unused clock bit set/clear functions
  Blackfin: bf537: rename "CONFIG_ADT75"
  ...

1 files changed, 10 insertions, 13 deletions

diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index eb8a54783fa0..b0e9467922e1 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -1936,12 +1936,12 @@ check_prevs_add(struct task_struct *curr, struct held_lock *next)
 
         for (;;) {
                 int distance = curr->lockdep_depth - depth + 1;
-                hlock = curr->held_locks + depth-1;
+                hlock = curr->held_locks + depth - 1;
                 /*
                  * Only non-recursive-read entries get new dependencies
                  * added:
                  */
-                if (hlock->read != 2) {
+                if (hlock->read != 2 && hlock->check) {
                         if (!check_prev_add(curr, hlock, next,
                                                 distance, trylock_loop))
                                 return 0;
@@ -2098,7 +2098,7 @@ static int validate_chain(struct task_struct *curr, struct lockdep_map *lock,
          * (If lookup_chain_cache() returns with 1 it acquires
          * graph_lock for us)
          */
-        if (!hlock->trylock && (hlock->check == 2) &&
+        if (!hlock->trylock && hlock->check &&
             lookup_chain_cache(curr, hlock, chain_key)) {
                 /*
                  * Check whether last held lock:
@@ -2517,7 +2517,7 @@ mark_held_locks(struct task_struct *curr, enum mark_type mark)
 
                 BUG_ON(usage_bit >= LOCK_USAGE_STATES);
 
-                if (hlock_class(hlock)->key == __lockdep_no_validate__.subkeys)
+                if (!hlock->check)
                         continue;
 
                 if (!mark_lock(curr, hlock, usage_bit))
@@ -2557,7 +2557,7 @@ static void __trace_hardirqs_on_caller(unsigned long ip)
         debug_atomic_inc(hardirqs_on_events);
 }
 
-void trace_hardirqs_on_caller(unsigned long ip)
+__visible void trace_hardirqs_on_caller(unsigned long ip)
 {
         time_hardirqs_on(CALLER_ADDR0, ip);
 
@@ -2610,7 +2610,7 @@ EXPORT_SYMBOL(trace_hardirqs_on);
 /*
  * Hardirqs were disabled:
  */
-void trace_hardirqs_off_caller(unsigned long ip)
+__visible void trace_hardirqs_off_caller(unsigned long ip)
 {
         struct task_struct *curr = current;
 
@@ -3055,9 +3055,6 @@ static int __lock_acquire(struct lockdep_map *lock, unsigned int subclass,
         int class_idx;
         u64 chain_key;
 
-        if (!prove_locking)
-                check = 1;
-
         if (unlikely(!debug_locks))
                 return 0;
 
@@ -3069,8 +3066,8 @@ static int __lock_acquire(struct lockdep_map *lock, unsigned int subclass,
         if (DEBUG_LOCKS_WARN_ON(!irqs_disabled()))
                 return 0;
 
-        if (lock->key == &__lockdep_no_validate__)
-                check = 1;
+        if (!prove_locking || lock->key == &__lockdep_no_validate__)
+                check = 0;
 
         if (subclass < NR_LOCKDEP_CACHING_CLASSES)
                 class = lock->class_cache[subclass];
@@ -3138,7 +3135,7 @@ static int __lock_acquire(struct lockdep_map *lock, unsigned int subclass,
         hlock->holdtime_stamp = lockstat_clock();
 #endif
 
-        if (check == 2 && !mark_irqflags(curr, hlock))
+        if (check && !mark_irqflags(curr, hlock))
                 return 0;
 
         /* mark it as used: */
@@ -4191,7 +4188,7 @@ void debug_show_held_locks(struct task_struct *task)
 }
 EXPORT_SYMBOL_GPL(debug_show_held_locks);
 
-void lockdep_sys_exit(void)
+asmlinkage void lockdep_sys_exit(void)
 {
         struct task_struct *curr = current;