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Subject[patch] lockdep: improve lockdep_reset()
Subject: [patch] lockdep: improve lockdep_reset()
From: Ingo Molnar <mingo@elte.hu>

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>
---
kernel/lockdep.c | 3 +++
1 file changed, 3 insertions(+)

Index: linux/kernel/lockdep.c
===================================================================
--- linux.orig/kernel/lockdep.c
+++ linux/kernel/lockdep.c
@@ -2438,6 +2438,7 @@ EXPORT_SYMBOL_GPL(lock_release);
void lockdep_reset(void)
{
unsigned long flags;
+ int i;

raw_local_irq_save(flags);
current->curr_chain_key = 0;
@@ -2448,6 +2449,8 @@ 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);
}

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