[GIT PULL] locking fixes

[Ingo Molnar]

Linus,

Please pull the latest locking-urgent-for-linus git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 
locking-urgent-for-linus

   # HEAD: b50776ae011cfd26df3cc2b4af8b2dc3b683e553 locking/atomics: Don't 
assume that scripts are executable

A lockdep warning fix and a script execution fix when atomics are 
generated.

 Thanks,

        Ingo

------------------>
Andrew Morton (1):
      locking/atomics: Don't assume that scripts are executable

Bart Van Assche (1):
      locking/lockdep: Make lockdep_unregister_key() honor 'debug_locks' again


 kernel/locking/lockdep.c      | 9 +++++----
 scripts/atomic/gen-atomics.sh | 2 +-
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index e16766ff184b..e221be724fe8 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -4907,8 +4907,9 @@ void lockdep_unregister_key(struct lock_class_key *key)
                return;
 
        raw_local_irq_save(flags);
-       arch_spin_lock(&lockdep_lock);
-       current->lockdep_recursion = 1;
+       if (!graph_lock())
+               goto out_irq;
+
        pf = get_pending_free();
        hlist_for_each_entry_rcu(k, hash_head, hash_entry) {
                if (k == key) {
@@ -4920,8 +4921,8 @@ void lockdep_unregister_key(struct lock_class_key *key)
        WARN_ON_ONCE(!found);
        __lockdep_free_key_range(pf, key, 1);
        call_rcu_zapped(pf);
-       current->lockdep_recursion = 0;
-       arch_spin_unlock(&lockdep_lock);
+       graph_unlock();
+out_irq:
        raw_local_irq_restore(flags);
 
        /* Wait until is_dynamic_key() has finished accessing k->hash_entry. */
diff --git a/scripts/atomic/gen-atomics.sh b/scripts/atomic/gen-atomics.sh
index 27400b0cd732..000dc6437893 100644
--- a/scripts/atomic/gen-atomics.sh
+++ b/scripts/atomic/gen-atomics.sh
@@ -13,7 +13,7 @@ gen-atomic-long.sh              asm-generic/atomic-long.h
 gen-atomic-fallback.sh          linux/atomic-fallback.h
 EOF
 while read script header; do
-       ${ATOMICDIR}/${script} ${ATOMICTBL} > ${LINUXDIR}/include/${header}
+       /bin/sh ${ATOMICDIR}/${script} ${ATOMICTBL} > 
${LINUXDIR}/include/${header}
        HASH="$(sha1sum ${LINUXDIR}/include/${header})"
        HASH="${HASH%% *}"
        printf "// %s\n" "${HASH}" >> ${LINUXDIR}/include/${header}