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authorTejun Heo <tj@kernel.org>2015-02-13 14:37:28 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-02-13 21:21:37 -0800
commit333470ee46b6851477dc9392eb71ba8ffa4f3387 (patch)
treea66ef9a7c1990fdca9a40051a852211c27ceaf24 /kernel/sched/stats.c
parentad853b48cb4650285e8544eebbba5bbd9274ee15 (diff)
sched: use %*pb[l] to print bitmaps including cpumasks and nodemasks
printk and friends can now format bitmaps using '%*pb[l]'. cpumask and nodemask also provide cpumask_pr_args() and nodemask_pr_args() respectively which can be used to generate the two printf arguments necessary to format the specified cpu/nodemask. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/sched/stats.c')
-rw-r--r--kernel/sched/stats.c11
1 files changed, 2 insertions, 9 deletions
diff --git a/kernel/sched/stats.c b/kernel/sched/stats.c
index a476bea17fbc..87e2c9f0c33e 100644
--- a/kernel/sched/stats.c
+++ b/kernel/sched/stats.c
@@ -15,11 +15,6 @@
static int show_schedstat(struct seq_file *seq, void *v)
{
int cpu;
- int mask_len = DIV_ROUND_UP(NR_CPUS, 32) * 9;
- char *mask_str = kmalloc(mask_len, GFP_KERNEL);
-
- if (mask_str == NULL)
- return -ENOMEM;
if (v == (void *)1) {
seq_printf(seq, "version %d\n", SCHEDSTAT_VERSION);
@@ -50,9 +45,8 @@ static int show_schedstat(struct seq_file *seq, void *v)
for_each_domain(cpu, sd) {
enum cpu_idle_type itype;
- cpumask_scnprintf(mask_str, mask_len,
- sched_domain_span(sd));
- seq_printf(seq, "domain%d %s", dcount++, mask_str);
+ seq_printf(seq, "domain%d %*pb", dcount++,
+ cpumask_pr_args(sched_domain_span(sd)));
for (itype = CPU_IDLE; itype < CPU_MAX_IDLE_TYPES;
itype++) {
seq_printf(seq, " %u %u %u %u %u %u %u %u",
@@ -76,7 +70,6 @@ static int show_schedstat(struct seq_file *seq, void *v)
rcu_read_unlock();
#endif
}
- kfree(mask_str);
return 0;
}