perf evsel: Add hists helper

Not all tools need a hists instance per perf_evsel, so lets pave the way
to remove evsel->hists while leaving a way to access the hists from a
specially allocated evsel, one that comes with space at the end where
lives the evsel.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-qlktkhe31w4mgtbd84035sr2@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 10 insertions, 10 deletions

diff --git a/tools/perf/tests/hists_output.c b/tools/perf/tests/hists_output.c
index e3bbd6c54c1b..a748f2be1222 100644
--- a/tools/perf/tests/hists_output.c
+++ b/tools/perf/tests/hists_output.c
@@ -122,7 +122,7 @@ typedef int (*test_fn_t)(struct perf_evsel *, struct machine *);
 static int test1(struct perf_evsel *evsel, struct machine *machine)
 {
         int err;
-        struct hists *hists = &evsel->hists;
+        struct hists *hists = evsel__hists(evsel);
         struct hist_entry *he;
         struct rb_root *root;
         struct rb_node *node;
@@ -159,7 +159,7 @@ static int test1(struct perf_evsel *evsel, struct machine *machine)
                 print_hists_out(hists);
         }
 
-        root = &evsel->hists.entries;
+        root = &hists->entries;
         node = rb_first(root);
         he = rb_entry(node, struct hist_entry, rb_node);
         TEST_ASSERT_VAL("Invalid hist entry",
@@ -224,7 +224,7 @@ out:
 static int test2(struct perf_evsel *evsel, struct machine *machine)
 {
         int err;
-        struct hists *hists = &evsel->hists;
+        struct hists *hists = evsel__hists(evsel);
         struct hist_entry *he;
         struct rb_root *root;
         struct rb_node *node;
@@ -259,7 +259,7 @@ static int test2(struct perf_evsel *evsel, struct machine *machine)
                 print_hists_out(hists);
         }
 
-        root = &evsel->hists.entries;
+        root = &hists->entries;
         node = rb_first(root);
         he = rb_entry(node, struct hist_entry, rb_node);
         TEST_ASSERT_VAL("Invalid hist entry",
@@ -280,7 +280,7 @@ out:
 static int test3(struct perf_evsel *evsel, struct machine *machine)
 {
         int err;
-        struct hists *hists = &evsel->hists;
+        struct hists *hists = evsel__hists(evsel);
         struct hist_entry *he;
         struct rb_root *root;
         struct rb_node *node;
@@ -313,7 +313,7 @@ static int test3(struct perf_evsel *evsel, struct machine *machine)
                 print_hists_out(hists);
         }
 
-        root = &evsel->hists.entries;
+        root = &hists->entries;
         node = rb_first(root);
         he = rb_entry(node, struct hist_entry, rb_node);
         TEST_ASSERT_VAL("Invalid hist entry",
@@ -354,7 +354,7 @@ out:
 static int test4(struct perf_evsel *evsel, struct machine *machine)
 {
         int err;
-        struct hists *hists = &evsel->hists;
+        struct hists *hists = evsel__hists(evsel);
         struct hist_entry *he;
         struct rb_root *root;
         struct rb_node *node;
@@ -391,7 +391,7 @@ static int test4(struct perf_evsel *evsel, struct machine *machine)
                 print_hists_out(hists);
         }
 
-        root = &evsel->hists.entries;
+        root = &hists->entries;
         node = rb_first(root);
         he = rb_entry(node, struct hist_entry, rb_node);
         TEST_ASSERT_VAL("Invalid hist entry",
@@ -456,7 +456,7 @@ out:
 static int test5(struct perf_evsel *evsel, struct machine *machine)
 {
         int err;
-        struct hists *hists = &evsel->hists;
+        struct hists *hists = evsel__hists(evsel);
         struct hist_entry *he;
         struct rb_root *root;
         struct rb_node *node;
@@ -494,7 +494,7 @@ static int test5(struct perf_evsel *evsel, struct machine *machine)
                 print_hists_out(hists);
         }
 
-        root = &evsel->hists.entries;
+        root = &hists->entries;
         node = rb_first(root);
         he = rb_entry(node, struct hist_entry, rb_node);