perf tools: Use just forward declarations for struct thread where possible
Removing various instances of unnecessary includes, reducing the maze of
header dependencies.
Link: http://lkml.kernel.org/n/tip-hwu6eyuok9pc57alookyzmsf@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 19d993f..3041c6b 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -19,6 +19,7 @@
#include "perf_regs.h"
#include "asm/bug.h"
#include "auxtrace.h"
+#include "thread.h"
#include "thread-stack.h"
#include "stat.h"