[PATCH] lockdep: improve lockdep_reset()

Clear all the chains during lockdep_reset().  This fixes some locking-selftest
false positives i saw on -rt.  (never saw those on mainline though, but it
could happen.)

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/kernel/lockdep.c b/kernel/lockdep.c
index 5ba2825bd46a..77fa791f6f31 100644
--- a/kernel/lockdep.c
+++ b/kernel/lockdep.c
@@ -2437,6 +2437,7 @@ EXPORT_SYMBOL_GPL(lock_release);
 void lockdep_reset(void)
 {
         unsigned long flags;
+        int i;
 
         raw_local_irq_save(flags);
         current->curr_chain_key = 0;
@@ -2447,6 +2448,8 @@ void lockdep_reset(void)
         nr_softirq_chains = 0;
         nr_process_chains = 0;
         debug_locks = 1;
+        for (i = 0; i < CHAINHASH_SIZE; i++)
+                INIT_LIST_HEAD(chainhash_table + i);
         raw_local_irq_restore(flags);
 }