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[tip:perf/core] perf hist: Remove the needless callchain.h include from hist.h

Commit-ID:  71551288d2fde0c24df3c248e3e80be92783376d
Gitweb:     https://git.kernel.org/tip/71551288d2fde0c24df3c248e3e80be92783376d
Author:     Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
AuthorDate: Tue, 29 Jan 2019 12:04:58 +0100
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Wed, 6 Feb 2019 10:00:38 -0300

perf hist: Remove the needless callchain.h include from hist.h

Nothing that is provided by callchain.h is used there, just things that
should've be directly included in hist.h, such as rbtree.h and a
map_symbol forward declaration.

Remove it so that we reduce the headers dependency tree.

Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Link: https://lkml.kernel.org/n/tip-zivvqfx93w5zzur7hr7h0nlh@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
 tools/perf/util/hist.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
index 38a72eb81427..6b872079ead5 100644
--- a/tools/perf/util/hist.h
+++ b/tools/perf/util/hist.h
@@ -2,9 +2,9 @@
 #ifndef __PERF_HIST_H
 #define __PERF_HIST_H
+#include <linux/rbtree.h>
 #include <linux/types.h>
 #include <pthread.h>
-#include "callchain.h"
 #include "evsel.h"
 #include "header.h"
 #include "color.h"
@@ -13,6 +13,7 @@
 struct hist_entry;
 struct hist_entry_ops;
 struct addr_location;
+struct map_symbol;
 struct mem_info;
 struct branch_info;
 struct symbol;