Commit 29250d30 authored May 10, 2017 by Linus Torvalds

linux-trace

Pull tracing fix from Steven Rostedt:
 "This is a trivial patch that changes a check for a cpumask from a NULL
  pointer to using cpumask_available(), which will do the check. This is
  because cpumasks when not allocated are always set, and clang
  complains about it"

* tag 'trace-v4.12-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing: Use cpumask_available() to check if cpumask variable may be used

parents a2d9214c 4dbbe2d8

kernel/trace/trace.c

+3 −2

Original line number	Diff line number	Diff line
		@@ -3311,13 +3311,14 @@ static void test_cpu_buff_start(struct trace_iterator *iter)
		if (!(iter->iter_flags & TRACE_FILE_ANNOTATE))
		return;

		if (iter->started && cpumask_test_cpu(iter->cpu, iter->started))
		if (cpumask_available(iter->started) &&
		cpumask_test_cpu(iter->cpu, iter->started))
		return;

		if (per_cpu_ptr(iter->trace_buffer->data, iter->cpu)->skipped_entries)
		return;

		if (iter->started)
		if (cpumask_available(iter->started))
		cpumask_set_cpu(iter->cpu, iter->started);

		/* Don't print started cpu buffer for the first entry of the trace */