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Commit 12aac19d authored by Li Zefan's avatar Li Zefan Committed by Ingo Molnar
Browse files

lockdep: Simplify lockdep_chains seqfile code 



- make lc_next() call lc_start()
- use lock_chains directly instead of storing it in m->private

Signed-off-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <4A88ED57.5060609@cn.fujitsu.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 8109e1de

kernel/lockdep_proc.c

+7 −30
Original line number Diff line number Diff line
@@ -113,26 +113,6 @@ static const struct file_operations proc_lockdep_operations = { 
};



#ifdef CONFIG_PROVE_LOCKING

static void *lc_next(struct seq_file *m, void *v, loff_t *pos)

{

	struct lock_chain *chain;



	(*pos)++;



	if (v == SEQ_START_TOKEN)

		chain = m->private;

	else {

		chain = v;



		if (*pos - 1 < nr_lock_chains)

			chain = lock_chains + (*pos - 1);

		else

			chain = NULL;

	}



	return chain;

}



static void *lc_start(struct seq_file *m, loff_t *pos)

{

	if (*pos == 0)
@@ -144,6 +124,12 @@ static void *lc_start(struct seq_file *m, loff_t *pos) 
	return NULL;

}



static void *lc_next(struct seq_file *m, void *v, loff_t *pos)

{

	(*pos)++;

	return lc_start(m, pos);

}



static void lc_stop(struct seq_file *m, void *v)

{

}
@@ -184,16 +170,7 @@ static const struct seq_operations lockdep_chains_ops = { 


static int lockdep_chains_open(struct inode *inode, struct file *file)

{

	int res = seq_open(file, &lockdep_chains_ops);

	if (!res) {

		struct seq_file *m = file->private_data;



		if (nr_lock_chains)

			m->private = lock_chains;

		else

			m->private = NULL;

	}

	return res;

	return seq_open(file, &lockdep_chains_ops);

}



static const struct file_operations proc_lockdep_chains_operations = {