diff options
| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2016-12-07 14:31:33 +0100 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2016-12-12 23:57:26 +0100 |
| commit | 99e6f6e8134b0c9d5d82eb2af1068a57199125e4 (patch) | |
| tree | e6049ca82e99b94f25a4f55f8b0b238d646f5fe9 | |
| parent | tracing: Use SOFTIRQ_OFFSET for softirq dectection for more accurate results (diff) | |
| download | linux-99e6f6e8134b0c9d5d82eb2af1068a57199125e4.tar.xz linux-99e6f6e8134b0c9d5d82eb2af1068a57199125e4.zip | |
tracing/rb: Init the CPU mask on allocation
Before commit b32614c03413 ("tracing/rb: Convert to hotplug state
machine") the allocated cpumask was initialized to the mask of ONLINE or
POSSIBLE CPUs. After the CPU hotplug changes the buffer initialisation
moved to trace_rb_cpu_prepare() but I forgot to initially set the
cpumask to zero. This is done now.
Link: http://lkml.kernel.org/r/20161207133133.hzkcqfllxcdi3joz@linutronix.de
Fixes: b32614c03413 ("tracing/rb: Convert to hotplug state machine")
Reported-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Tested-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
| -rw-r--r-- | kernel/trace/ring_buffer.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index f17476f9d7f4..7edfd41d506c 100644 --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -1303,7 +1303,7 @@ struct ring_buffer *__ring_buffer_alloc(unsigned long size, unsigned flags, if (!buffer) return NULL; - if (!alloc_cpumask_var(&buffer->cpumask, GFP_KERNEL)) + if (!zalloc_cpumask_var(&buffer->cpumask, GFP_KERNEL)) goto fail_free_buffer; nr_pages = DIV_ROUND_UP(size, BUF_PAGE_SIZE); |