From 1a40243bae6fa0cc09cee40d51e258c725d897e6 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Fri, 13 Feb 2015 14:37:39 -0800 Subject: [PATCH] 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: Tejun Heo Cc: Steven Rostedt Cc: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- kernel/trace/trace.c | 6 +++--- kernel/trace/trace_seq.c | 2 +- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 77b8dc528006..62c6506d663f 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -3353,12 +3353,12 @@ tracing_cpumask_read(struct file *filp, char __user *ubuf, mutex_lock(&tracing_cpumask_update_lock); - len = cpumask_scnprintf(mask_str, count, tr->tracing_cpumask); - if (count - len < 2) { + len = snprintf(mask_str, count, "%*pb\n", + cpumask_pr_args(tr->tracing_cpumask)); + 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); out_err: diff --git a/kernel/trace/trace_seq.c b/kernel/trace/trace_seq.c index f8b45d8792f9..e694c9f9efa4 100644 --- a/kernel/trace/trace_seq.c +++ b/kernel/trace/trace_seq.c @@ -120,7 +120,7 @@ void trace_seq_bitmask(struct trace_seq *s, const unsigned long *maskp, __trace_seq_init(s); - 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; -- 2.20.1