Commit 1a40243b authored by Tejun Heo's avatar Tejun Heo Committed by Linus Torvalds
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tracing: 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: default avatarTejun Heo <>
Cc: Steven Rostedt <>
Cc: Ingo Molnar <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent dfbcbf42
......@@ -3353,12 +3353,12 @@ tracing_cpumask_read(struct file *filp, char __user *ubuf,
len = cpumask_scnprintf(mask_str, count, tr->tracing_cpumask);
if (count - len < 2) {
len = snprintf(mask_str, count, "%*pb\n",
if (len >= count) {
count = -EINVAL;
goto out_err;
len += sprintf(mask_str + len, "\n");
count = simple_read_from_buffer(ubuf, count, ppos, mask_str, NR_CPUS+1);
......@@ -120,7 +120,7 @@ void trace_seq_bitmask(struct trace_seq *s, const unsigned long *maskp,
seq_buf_bitmask(&s->seq, maskp, nmaskbits);
seq_buf_printf(&s->seq, "%*pb", nmaskbits, maskp);
if (unlikely(seq_buf_has_overflowed(&s->seq))) {
s->seq.len = save_len;
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