linux-kernel - [PATCH 44/73] libperf: Add perf_mmap_

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Message-Id: <20190913132355.21634-45-jolsa@kernel.org>
Date:   Fri, 13 Sep 2019 15:23:26 +0200
From:   Jiri Olsa <jolsa@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     lkml <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Michael Petlan <mpetlan@...hat.com>
Subject: [PATCH 44/73] libperf: Add perf_mmap__unmap function

Move perf_mmap__unmap function under libperf,
to internal header internal/mmap.h. It will be
used in following patches. And rename the existing
perf's function to mmap__munmap.

Link: http://lkml.kernel.org/n/tip-5k8rntfq0sudli9dzw6aqg5a@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
 tools/perf/lib/include/internal/mmap.h |  1 +
 tools/perf/lib/mmap.c                  | 10 ++++++++++
 tools/perf/util/evlist.c               |  4 ++--
 tools/perf/util/mmap.c                 | 11 +++--------
 tools/perf/util/mmap.h                 |  2 +-
 5 files changed, 17 insertions(+), 11 deletions(-)

diff --git a/tools/perf/lib/include/internal/mmap.h b/tools/perf/lib/include/internal/mmap.h
index 372521cae06d..5c9ba00e67e1 100644
--- a/tools/perf/lib/include/internal/mmap.h
+++ b/tools/perf/lib/include/internal/mmap.h
@@ -39,6 +39,7 @@ size_t perf_mmap__mmap_len(struct perf_mmap *map);
 void perf_mmap__init(struct perf_mmap *map, bool overwrite);
 int perf_mmap__mmap(struct perf_mmap *map, struct perf_mmap_param *mp,
 		    int fd, int cpu);
+void perf_mmap__munmap(struct perf_mmap *map);
 void perf_mmap__get(struct perf_mmap *map);
 
 #endif /* __LIBPERF_INTERNAL_MMAP_H */
diff --git a/tools/perf/lib/mmap.c b/tools/perf/lib/mmap.c
index b765e0505bb6..6eb228d89206 100644
--- a/tools/perf/lib/mmap.c
+++ b/tools/perf/lib/mmap.c
@@ -32,6 +32,16 @@ int perf_mmap__mmap(struct perf_mmap *map, struct perf_mmap_param *mp,
 	return 0;
 }
 
+void perf_mmap__munmap(struct perf_mmap *map)
+{
+	if (map && map->base != NULL) {
+		munmap(map->base, perf_mmap__mmap_len(map));
+		map->base = NULL;
+		map->fd = -1;
+		refcount_set(&map->refcnt, 0);
+	}
+}
+
 void perf_mmap__get(struct perf_mmap *map)
 {
 	refcount_inc(&map->refcnt);
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 0191d3b2eb20..22165862f587 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -576,11 +576,11 @@ static void evlist__munmap_nofree(struct evlist *evlist)
 
 	if (evlist->mmap)
 		for (i = 0; i < evlist->core.nr_mmaps; i++)
-			perf_mmap__munmap(&evlist->mmap[i]);
+			mmap__munmap(&evlist->mmap[i]);
 
 	if (evlist->overwrite_mmap)
 		for (i = 0; i < evlist->core.nr_mmaps; i++)
-			perf_mmap__munmap(&evlist->overwrite_mmap[i]);
+			mmap__munmap(&evlist->overwrite_mmap[i]);
 }
 
 void evlist__munmap(struct evlist *evlist)
diff --git a/tools/perf/util/mmap.c b/tools/perf/util/mmap.c
index a7e0b4afc176..eb77141dbfca 100644
--- a/tools/perf/util/mmap.c
+++ b/tools/perf/util/mmap.c
@@ -114,7 +114,7 @@ void perf_mmap__put(struct mmap *map)
 	BUG_ON(map->core.base && refcount_read(&map->core.refcnt) == 0);
 
 	if (refcount_dec_and_test(&map->core.refcnt))
-		perf_mmap__munmap(map);
+		mmap__munmap(map);
 }
 
 void perf_mmap__consume(struct mmap *map)
@@ -305,19 +305,14 @@ static void perf_mmap__aio_munmap(struct mmap *map __maybe_unused)
 }
 #endif
 
-void perf_mmap__munmap(struct mmap *map)
+void mmap__munmap(struct mmap *map)
 {
+	perf_mmap__munmap(&map->core);
 	perf_mmap__aio_munmap(map);
 	if (map->data != NULL) {
 		munmap(map->data, mmap__mmap_len(map));
 		map->data = NULL;
 	}
-	if (map->core.base != NULL) {
-		munmap(map->core.base, mmap__mmap_len(map));
-		map->core.base = NULL;
-		map->core.fd = -1;
-		refcount_set(&map->core.refcnt, 0);
-	}
 	auxtrace_mmap__munmap(&map->auxtrace_mmap);
 }
 
diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h
index f7ee0252db24..852f1ec20787 100644
--- a/tools/perf/util/mmap.h
+++ b/tools/perf/util/mmap.h
@@ -71,7 +71,7 @@ struct mmap_params {
 };
 
 int mmap__mmap(struct mmap *map, struct mmap_params *mp, int fd, int cpu);
-void perf_mmap__munmap(struct mmap *map);
+void mmap__munmap(struct mmap *map);
 
 void perf_mmap__put(struct mmap *map);
 
-- 
2.21.0