libperf: Add perf_mmap struct

Add the perf_mmap struct to libperf.

The definition is added into:

  include/internal/mmap.h

which is not to be included by users, but shared within perf and
libperf.

Committer notes:

Remove unnecessary includes from tools/perf/lib/include/internal/mmap.h,
those will be readded as they become necessary, later in the series.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lore.kernel.org/lkml/20190913132355.21634-11-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 4 insertions, 3 deletions

diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h
index ab086ede044a..d2f0ce581e2c 100644
--- a/tools/perf/util/mmap.h
+++ b/tools/perf/util/mmap.h
@@ -1,6 +1,7 @@
 #ifndef __PERF_MMAP_H
 #define __PERF_MMAP_H 1
 
+#include <internal/mmap.h>
 #include <linux/compiler.h>
 #include <linux/refcount.h>
 #include <linux/types.h>
@@ -20,7 +21,7 @@ struct aiocb;
  * @refcnt - e.g. code using PERF_EVENT_IOC_SET_OUTPUT to share this
  */
 struct mmap {
-	void		 *base;
+	struct perf_mmap	core;
 	int		 mask;
 	int		 fd;
 	int		 cpu;
@@ -60,12 +61,12 @@ void perf_mmap__consume(struct mmap *map);
 
 static inline u64 perf_mmap__read_head(struct mmap *mm)
 {
-	return ring_buffer_read_head(mm->base);
+	return ring_buffer_read_head(mm->core.base);
 }
 
 static inline void perf_mmap__write_tail(struct mmap *md, u64 tail)
 {
-	ring_buffer_write_tail(md->base, tail);
+	ring_buffer_write_tail(md->core.base, tail);
 }
 
 union perf_event *perf_mmap__read_forward(struct mmap *map);