diff options
| author |   Tejun Heo <tj@kernel.org> | 2015-02-13 14:37:39 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-13 21:21:37 -0800 |
| commit | 1a40243bae6fa0cc09cee40d51e258c725d897e6 (patch) | |
| tree | 77f9ba8333dbfbefc26dbf406d71d169a14b335b /kernel/trace/trace.c | |
| parent | workqueue: use %*pb[l] to format bitmaps including cpumasks and nodemasks (diff) | |
| download | linux-dev-1a40243bae6fa0cc09cee40d51e258c725d897e6.tar.xz linux-dev-1a40243bae6fa0cc09cee40d51e258c725d897e6.zip | |
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 <tj@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/trace/trace.c')
| -rw-r--r-- | kernel/trace/trace.c | 6 |
1 files changed, 3 insertions, 3 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: |