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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: Li Zefan <lizf@cn.fujitsu.com>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <4A88ED57.5060609@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Li Zefan 2009-08-17 13:40:39 +08:00 committed by Ingo Molnar
parent 8109e1de85
commit 12aac19d4b
1 changed files with 7 additions and 30 deletions
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37
kernel/lockdep_proc.c
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@ -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 = {