libperf: Add perf_cpu_map struct

Add perf_cpu_map struct to libperf.

It's added as a declaration into:

  include/perf/cpumap.h

which will be included by users.

The perf_cpu_map struct definition is added into:

  include/internal/cpumap.h

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

We tried the total separation of the perf_cpu_map struct in libperf, but
it lead to complications and much bigger changes in perf code, so we
decided to share the declaration.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20190721112506.12306-29-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

4 files changed, 26 insertions, 0 deletions

diff --git a/tools/perf/lib/Build b/tools/perf/lib/Build
index 5196958cec01..195b274db49a 100644
--- a/tools/perf/lib/Build
+++ b/tools/perf/lib/Build
@@ -1 +1,2 @@
 libperf-y += core.o
+libperf-y += cpumap.o
diff --git a/tools/perf/lib/cpumap.c b/tools/perf/lib/cpumap.c
new file mode 100644
index 000000000000..86a199c26f20
--- /dev/null
+++ b/tools/perf/lib/cpumap.c
@@ -0,0 +1,5 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <perf/cpumap.h>
+#include <stdlib.h>
+#include <linux/refcount.h>
+#include <internal/cpumap.h>
diff --git a/tools/perf/lib/include/internal/cpumap.h b/tools/perf/lib/include/internal/cpumap.h
new file mode 100644
index 000000000000..53ce95374b05
--- /dev/null
+++ b/tools/perf/lib/include/internal/cpumap.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LIBPERF_INTERNAL_CPUMAP_H
+#define __LIBPERF_INTERNAL_CPUMAP_H
+
+#include <linux/refcount.h>
+
+struct perf_cpu_map {
+        refcount_t      refcnt;
+        int             nr;
+        int             map[];
+};
+
+#endif /* __LIBPERF_INTERNAL_CPUMAP_H */
diff --git a/tools/perf/lib/include/perf/cpumap.h b/tools/perf/lib/include/perf/cpumap.h
new file mode 100644
index 000000000000..8355d3ce7d0c
--- /dev/null
+++ b/tools/perf/lib/include/perf/cpumap.h
@@ -0,0 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LIBPERF_CPUMAP_H
+#define __LIBPERF_CPUMAP_H
+
+struct perf_cpu_map;
+
+#endif /* __LIBPERF_CPUMAP_H */