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cpumask: convert kernel trace functions further

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Impact: Reduce future memory usage, use new cpumask API.

Since the last patch was created and acked, more old cpumask users
slipped into kernel/trace.

Mostly trivial conversions, except struct trace_iterator's "started"
member becomes a cpumask_var_t.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2009-01-01 10:12:23 +10:30
parent 9e01c1b74c
commit 4462344ee9
6 changed files with 16 additions and 10 deletions
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12
kernel/trace/trace.c
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@@ -1811,10 +1811,10 @@ static void test_cpu_buff_start(struct trace_iterator *iter)
if (!(iter->iter_flags & TRACE_FILE_ANNOTATE))
return;
if (cpu_isset(iter->cpu, iter->started))
if (cpumask_test_cpu(iter->cpu, iter->started))
return;
cpu_set(iter->cpu, iter->started);
cpumask_set_cpu(iter->cpu, iter->started);
trace_seq_printf(s, "##### CPU %u buffer started ####\n", iter->cpu);
}
@@ -3114,10 +3114,15 @@ static int tracing_open_pipe(struct inode *inode, struct file *filp)
if (!iter)
return -ENOMEM;
if (!alloc_cpumask_var(&iter->started, GFP_KERNEL)) {
kfree(iter);
return -ENOMEM;
}
mutex_lock(&trace_types_lock);
/* trace pipe does not show start of buffer */
cpus_setall(iter->started);
cpumask_setall(iter->started);
iter->tr = &global_trace;
iter->trace = current_trace;
@@ -3134,6 +3139,7 @@ static int tracing_release_pipe(struct inode *inode, struct file *file)
{
struct trace_iterator *iter = file->private_data;
free_cpumask_var(iter->started);
kfree(iter);
atomic_dec(&tracing_reader);