Merge tag 'perf-core-for-mingo-4.19-20180820' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent

Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:

LLVM/clang/eBPF: (Arnaldo Carvalho de Melo)

 - Allow passing options to llc in addition to to clang.

Hardware tracing: (Jack Henschel)

 - Improve error message for PMU address filters, clarifying availability of
   that feature in hardware having hardware tracing such as Intel PT.

Python interface: (Jiri Olsa)

 - Fix read_on_cpu() interface.

ELF/DWARF libraries: (Jiri Olsa)

 - Fix handling of the combo compressed module file + decompressed associated
   debuginfo file.

Build (Rasmus Villemoes)

 - Disable parallelism for 'make clean', avoiding multiple submakes deleting
   the same files and causing the build to fail on systems such as Yocto.

Kernel ABI copies: (Arnaldo Carvalho de Melo)

 - Update tools's copy of x86's cpufeatures.h.

 - Update arch/x86/lib/memcpy_64.S copy used in 'perf bench mem memcpy'.

Miscellaneous: (Steven Rostedt)

 - Change libtraceevent to SPDX License format.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 19 insertions, 1 deletions

diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
index f74fbb652a4f..ce501ba14b08 100644
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -11,6 +11,7 @@
 #include "cpumap.h"
 #include "print_binary.h"
 #include "thread_map.h"
+#include "mmap.h"
 
 #if PY_MAJOR_VERSION < 3
 #define _PyUnicode_FromString(arg) \
@@ -976,6 +977,20 @@ static PyObject *pyrf_evlist__add(struct pyrf_evlist *pevlist,
         return Py_BuildValue("i", evlist->nr_entries);
 }
 
+static struct perf_mmap *get_md(struct perf_evlist *evlist, int cpu)
+{
+        int i;
+
+        for (i = 0; i < evlist->nr_mmaps; i++) {
+                struct perf_mmap *md = &evlist->mmap[i];
+
+                if (md->cpu == cpu)
+                        return md;
+        }
+
+        return NULL;
+}
+
 static PyObject *pyrf_evlist__read_on_cpu(struct pyrf_evlist *pevlist,
                                           PyObject *args, PyObject *kwargs)
 {
@@ -990,7 +1005,10 @@ static PyObject *pyrf_evlist__read_on_cpu(struct pyrf_evlist *pevlist,
                                          &cpu, &sample_id_all))
                 return NULL;
 
-        md = &evlist->mmap[cpu];
+        md = get_md(evlist, cpu);
+        if (!md)
+                return NULL;
+
         if (perf_mmap__read_init(md) < 0)
                 goto end;