lockdep: Fix missing entries in /proc/lock_chains
Two entries are missing in the output of /proc/lock_chains. One is chains[1]. When lc_next() is called the 1st time, chains[0] is returned. And when it's called the 2nd time, chains[2] is returned. The other missing ons is, when lc_start() is called the 2nd time, we should start from chains[@pos-1] but not chains[@pos], because pos == 0 is the header. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Cc: Peter Zijlstra <peterz@infradead.org> LKML-Reference: <4A88ED25.2040306@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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@ -160,8 +160,8 @@ static void *lc_next(struct seq_file *m, void *v, loff_t *pos)
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else {
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else {
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chain = v;
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chain = v;
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if (*pos < nr_lock_chains)
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if (*pos - 1 < nr_lock_chains)
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chain = lock_chains + *pos;
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chain = lock_chains + (*pos - 1);
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else
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else
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chain = NULL;
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chain = NULL;
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}
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}
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@ -174,8 +174,8 @@ static void *lc_start(struct seq_file *m, loff_t *pos)
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if (*pos == 0)
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if (*pos == 0)
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return SEQ_START_TOKEN;
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return SEQ_START_TOKEN;
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if (*pos < nr_lock_chains)
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if (*pos - 1 < nr_lock_chains)
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return lock_chains + *pos;
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return lock_chains + (*pos - 1);
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return NULL;
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return NULL;
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}
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}
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