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tracing: Use cpumask_available() to check if cpumask variable may be used

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This fixes the following clang warning:

kernel/trace/trace.c:3231:12: warning: address of array 'iter->started'
  will always evaluate to 'true' [-Wpointer-bool-conversion]
        if (iter->started)

Link: http://lkml.kernel.org/r/20170421234110.117075-1-mka@chromium.org

Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Matthias Kaehlcke 2017-04-21 16:41:10 -07:00 committed by Steven Rostedt (VMware)
parent 77c0eddeee
commit 4dbbe2d8e9
1 changed files with 3 additions and 2 deletions
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5
kernel/trace/trace.c
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@ -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 */