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Date:   Fri, 26 Aug 2022 09:42:28 -0700
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Subject: [PATCH v4 04/18] perf hist: Update use of pthread mutex
From:   Ian Rogers <irogers@google.com>
To:     Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
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Cc:     Ian Rogers <irogers@google.com>
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Precedence: bulk

Switch to the use of mutex wrappers that provide better error checking.

Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/perf/builtin-top.c | 8 ++++----
 tools/perf/util/hist.c   | 6 +++---
 tools/perf/util/hist.h   | 4 ++--
 3 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index fd8fd913c533..14e60f6f219c 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -220,7 +220,7 @@ static void perf_top__record_precise_ip(struct perf_top *top,
 		 * This function is now called with he->hists->lock held.
 		 * Release it before going to sleep.
 		 */
-		pthread_mutex_unlock(&he->hists->lock);
+		mutex_unlock(&he->hists->lock);
 
 		if (err == -ERANGE && !he->ms.map->erange_warned)
 			ui__warn_map_erange(he->ms.map, sym, ip);
@@ -230,7 +230,7 @@ static void perf_top__record_precise_ip(struct perf_top *top,
 			sleep(1);
 		}
 
-		pthread_mutex_lock(&he->hists->lock);
+		mutex_lock(&he->hists->lock);
 	}
 }
 
@@ -836,12 +836,12 @@ static void perf_event__process_sample(struct perf_tool *tool,
 		else
 			iter.ops = &hist_iter_normal;
 
-		pthread_mutex_lock(&hists->lock);
+		mutex_lock(&hists->lock);
 
 		if (hist_entry_iter__add(&iter, &al, top->max_stack, top) < 0)
 			pr_err("Problem incrementing symbol period, skipping event\n");
 
-		pthread_mutex_unlock(&hists->lock);
+		mutex_unlock(&hists->lock);
 	}
 
 	addr_location__put(&al);
diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index 1c085ab56534..698add038cec 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -1622,13 +1622,13 @@ struct rb_root_cached *hists__get_rotate_entries_in(struct hists *hists)
 {
 	struct rb_root_cached *root;
 
-	pthread_mutex_lock(&hists->lock);
+	mutex_lock(&hists->lock);
 
 	root = hists->entries_in;
 	if (++hists->entries_in > &hists->entries_in_array[1])
 		hists->entries_in = &hists->entries_in_array[0];
 
-	pthread_mutex_unlock(&hists->lock);
+	mutex_unlock(&hists->lock);
 
 	return root;
 }
@@ -2805,7 +2805,7 @@ int __hists__init(struct hists *hists, struct perf_hpp_list *hpp_list)
 	hists->entries_in = &hists->entries_in_array[0];
 	hists->entries_collapsed = RB_ROOT_CACHED;
 	hists->entries = RB_ROOT_CACHED;
-	pthread_mutex_init(&hists->lock, NULL);
+	mutex_init(&hists->lock);
 	hists->socket_filter = -1;
 	hists->hpp_list = hpp_list;
 	INIT_LIST_HEAD(&hists->hpp_formats);
diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
index 7ed4648d2fc2..508428b2c1b2 100644
--- a/tools/perf/util/hist.h
+++ b/tools/perf/util/hist.h
@@ -4,10 +4,10 @@
 
 #include <linux/rbtree.h>
 #include <linux/types.h>
-#include <pthread.h>
 #include "evsel.h"
 #include "color.h"
 #include "events_stats.h"
+#include "mutex.h"
 
 struct hist_entry;
 struct hist_entry_ops;
@@ -98,7 +98,7 @@ struct hists {
 	const struct dso	*dso_filter;
 	const char		*uid_filter_str;
 	const char		*symbol_filter_str;
-	pthread_mutex_t		lock;
+	struct mutex		lock;
 	struct hists_stats	stats;
 	u64			event_stream;
 	u16			col_len[HISTC_NR_COLS];
-- 
2.37.2.672.g94769d06f0-goog