Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull perf updates from Ingo Molnar:
 "With over 300 commits it's been a busy cycle - with most of the work
  concentrated on the tooling side (as it should).

  The main kernel side enhancements were:

   - Add per event callchain limit: Recently we introduced a sysctl to
     tune the max-stack for all events for which callchains were
     requested:

       $ sysctl kernel.perf_event_max_stack
       kernel.perf_event_max_stack = 127

     Now this patch introduces a way to configure this per event, i.e.
     this becomes possible:

       $ perf record -e sched:*/max-stack=2/ -e block:*/max-stack=10/ -a

     allowing finer tuning of how much buffer space callchains use.

     This uses an u16 from the reserved space at the end, leaving
     another u16 for future use.

     There has been interest in even finer tuning, namely to control the
     max stack for kernel and userspace callchains separately.  Further
     discussion is needed, we may for instance use the remaining u16 for
     that and when it is present, assume that the sample_max_stack
     introduced in this patch applies for the kernel, and the u16 left
     is used for limiting the userspace callchain (Arnaldo Carvalho de
     Melo)

   - Optimize AUX event (hardware assisted side-band event) delivery
     (Kan Liang)

   - Rework Intel family name macro usage (this is partially x86 arch
     work) (Dave Hansen)

   - Refine and fix Intel LBR support (David Carrillo-Cisneros)

   - Add support for Intel 'TopDown' events (Andi Kleen)

   - Intel uncore PMU driver fixes and enhancements (Kan Liang)

   - ... other misc changes.

  Here's an incomplete list of the tooling enhancements (but there's
  much more, see the shortlog and the git log for details):

   - Support cross unwinding, i.e.  collecting '--call-graph dwarf'
     perf.data files in one machine and then doing analysis in another
     machine of a different hardware architecture.  This enables, for
     instance, to do:

       $ perf record -a --call-graph dwarf

     on a x86-32 or aarch64 system and then do 'perf report' on it on a
     x86_64 workstation (He Kuang)

   - Allow reading from a backward ring buffer (one setup via
     sys_perf_event_open() with perf_event_attr.write_backward = 1)
     (Wang Nan)

   - Finish merging initial SDT (Statically Defined Traces) support, see
     cset comments for details about how it all works (Masami Hiramatsu)

   - Support attaching eBPF programs to tracepoints (Wang Nan)

   - Add demangling of symbols in programs written in the Rust language
     (David Tolnay)

   - Add support for tracepoints in the python binding, including an
     example, that sets up and parses sched:sched_switch events,
     tools/perf/python/tracepoint.py (Jiri Olsa)

   - Introduce --stdio-color to set up the color output mode selection
     in 'annotate' and 'report', allowing emit color escape sequences
     when redirecting the output of these tools (Arnaldo Carvalho de
     Melo)

   - Add 'callindent' option to 'perf script -F', to indent the Intel PT
     call stack, making this output more ftrace-like (Adrian Hunter,
     Andi Kleen)

   - Allow dumping the object files generated by llvm when processing
     eBPF scriptlet events (Wang Nan)

   - Add stackcollapse.py script to help generating flame graphs (Paolo
     Bonzini)

   - Add --ldlat option to 'perf mem' to specify load latency for loads
     event (e.g. cpu/mem-loads/ ) (Jiri Olsa)

   - Tooling support for Intel TopDown counters, recently added to the
     kernel (Andi Kleen)"

* 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (303 commits)
  perf tests: Add is_printable_array test
  perf tools: Make is_printable_array global
  perf script python: Fix string vs byte array resolving
  perf probe: Warn unmatched function filter correctly
  perf cpu_map: Add more helpers
  perf stat: Balance opening and reading events
  tools: Copy linux/{hash,poison}.h and check for drift
  perf tools: Remove include/linux/list.h from perf's MANIFEST
  tools: Copy the bitops files accessed from the kernel and check for drift
  Remove: kernel unistd*h files from perf's MANIFEST, not used
  perf tools: Remove tools/perf/util/include/linux/const.h
  perf tools: Remove tools/perf/util/include/asm/byteorder.h
  perf tools: Add missing linux/compiler.h include to perf-sys.h
  perf jit: Remove some no-op error handling
  perf jit: Add missing curly braces
  objtool: Initialize variable to silence old compiler
  objtool: Add -I$(srctree)/tools/arch/$(ARCH)/include/uapi
  perf record: Add --tail-synthesize option
  perf session: Don't warn about out of order event if write_backward is used
  perf tools: Enable overwrite settings
  ...

1 files changed, 120 insertions, 83 deletions

diff --git a/tools/perf/util/bpf-loader.c b/tools/perf/util/bpf-loader.c
index 493307d1414c..1f12e4e40006 100644
--- a/tools/perf/util/bpf-loader.c
+++ b/tools/perf/util/bpf-loader.c
@@ -37,6 +37,9 @@ DEFINE_PRINT_FN(info, 1)
 DEFINE_PRINT_FN(debug, 1)
 
 struct bpf_prog_priv {
+	bool is_tp;
+	char *sys_name;
+	char *evt_name;
 	struct perf_probe_event pev;
 	bool need_prologue;
 	struct bpf_insn *insns_buf;
@@ -118,6 +121,8 @@ clear_prog_priv(struct bpf_program *prog __maybe_unused,
 	cleanup_perf_probe_events(&priv->pev, 1);
 	zfree(&priv->insns_buf);
 	zfree(&priv->type_mapping);
+	zfree(&priv->sys_name);
+	zfree(&priv->evt_name);
 	free(priv);
 }
 
@@ -269,7 +274,8 @@ nextline:
 }
 
 static int
-parse_prog_config(const char *config_str, struct perf_probe_event *pev)
+parse_prog_config(const char *config_str, const char **p_main_str,
+		  bool *is_tp, struct perf_probe_event *pev)
 {
 	int err;
 	const char *main_str = parse_prog_config_kvpair(config_str, pev);
@@ -277,6 +283,22 @@ parse_prog_config(const char *config_str, struct perf_probe_event *pev)
 	if (IS_ERR(main_str))
 		return PTR_ERR(main_str);
 
+	*p_main_str = main_str;
+	if (!strchr(main_str, '=')) {
+		/* Is a tracepoint event? */
+		const char *s = strchr(main_str, ':');
+
+		if (!s) {
+			pr_debug("bpf: '%s' is not a valid tracepoint\n",
+				 config_str);
+			return -BPF_LOADER_ERRNO__CONFIG;
+		}
+
+		*is_tp = true;
+		return 0;
+	}
+
+	*is_tp = false;
 	err = parse_perf_probe_command(main_str, pev);
 	if (err < 0) {
 		pr_debug("bpf: '%s' is not a valid config string\n",
@@ -292,7 +314,8 @@ config_bpf_program(struct bpf_program *prog)
 {
 	struct perf_probe_event *pev = NULL;
 	struct bpf_prog_priv *priv = NULL;
-	const char *config_str;
+	const char *config_str, *main_str;
+	bool is_tp = false;
 	int err;
 
 	/* Initialize per-program probing setting */
@@ -313,10 +336,19 @@ config_bpf_program(struct bpf_program *prog)
 	pev = &priv->pev;
 
 	pr_debug("bpf: config program '%s'\n", config_str);
-	err = parse_prog_config(config_str, pev);
+	err = parse_prog_config(config_str, &main_str, &is_tp, pev);
 	if (err)
 		goto errout;
 
+	if (is_tp) {
+		char *s = strchr(main_str, ':');
+
+		priv->is_tp = true;
+		priv->sys_name = strndup(main_str, s - main_str);
+		priv->evt_name = strdup(s + 1);
+		goto set_priv;
+	}
+
 	if (pev->group && strcmp(pev->group, PERF_BPF_PROBE_GROUP)) {
 		pr_debug("bpf: '%s': group for event is set and not '%s'.\n",
 			 config_str, PERF_BPF_PROBE_GROUP);
@@ -339,7 +371,8 @@ config_bpf_program(struct bpf_program *prog)
 	}
 	pr_debug("bpf: config '%s' is ok\n", config_str);
 
-	err = bpf_program__set_private(prog, priv, clear_prog_priv);
+set_priv:
+	err = bpf_program__set_priv(prog, priv, clear_prog_priv);
 	if (err) {
 		pr_debug("Failed to set priv for program '%s'\n", config_str);
 		goto errout;
@@ -380,15 +413,14 @@ preproc_gen_prologue(struct bpf_program *prog, int n,
 		     struct bpf_insn *orig_insns, int orig_insns_cnt,
 		     struct bpf_prog_prep_result *res)
 {
+	struct bpf_prog_priv *priv = bpf_program__priv(prog);
 	struct probe_trace_event *tev;
 	struct perf_probe_event *pev;
-	struct bpf_prog_priv *priv;
 	struct bpf_insn *buf;
 	size_t prologue_cnt = 0;
 	int i, err;
 
-	err = bpf_program__get_private(prog, (void **)&priv);
-	if (err || !priv)
+	if (IS_ERR(priv) || !priv || priv->is_tp)
 		goto errout;
 
 	pev = &priv->pev;
@@ -535,17 +567,21 @@ static int map_prologue(struct perf_probe_event *pev, int *mapping,
 
 static int hook_load_preprocessor(struct bpf_program *prog)
 {
+	struct bpf_prog_priv *priv = bpf_program__priv(prog);
 	struct perf_probe_event *pev;
-	struct bpf_prog_priv *priv;
 	bool need_prologue = false;
 	int err, i;
 
-	err = bpf_program__get_private(prog, (void **)&priv);
-	if (err || !priv) {
+	if (IS_ERR(priv) || !priv) {
 		pr_debug("Internal error when hook preprocessor\n");
 		return -BPF_LOADER_ERRNO__INTERNAL;
 	}
 
+	if (priv->is_tp) {
+		priv->need_prologue = false;
+		return 0;
+	}
+
 	pev = &priv->pev;
 	for (i = 0; i < pev->ntevs; i++) {
 		struct probe_trace_event *tev = &pev->tevs[i];
@@ -607,9 +643,18 @@ int bpf__probe(struct bpf_object *obj)
 		if (err)
 			goto out;
 
-		err = bpf_program__get_private(prog, (void **)&priv);
-		if (err || !priv)
+		priv = bpf_program__priv(prog);
+		if (IS_ERR(priv) || !priv) {
+			err = PTR_ERR(priv);
 			goto out;
+		}
+
+		if (priv->is_tp) {
+			bpf_program__set_tracepoint(prog);
+			continue;
+		}
+
+		bpf_program__set_kprobe(prog);
 		pev = &priv->pev;
 
 		err = convert_perf_probe_events(pev, 1);
@@ -645,13 +690,12 @@ int bpf__unprobe(struct bpf_object *obj)
 {
 	int err, ret = 0;
 	struct bpf_program *prog;
-	struct bpf_prog_priv *priv;
 
 	bpf_object__for_each_program(prog, obj) {
+		struct bpf_prog_priv *priv = bpf_program__priv(prog);
 		int i;
 
-		err = bpf_program__get_private(prog, (void **)&priv);
-		if (err || !priv)
+		if (IS_ERR(priv) || !priv || priv->is_tp)
 			continue;
 
 		for (i = 0; i < priv->pev.ntevs; i++) {
@@ -694,26 +738,34 @@ int bpf__load(struct bpf_object *obj)
 	return 0;
 }
 
-int bpf__foreach_tev(struct bpf_object *obj,
-		     bpf_prog_iter_callback_t func,
-		     void *arg)
+int bpf__foreach_event(struct bpf_object *obj,
+		       bpf_prog_iter_callback_t func,
+		       void *arg)
 {
 	struct bpf_program *prog;
 	int err;
 
 	bpf_object__for_each_program(prog, obj) {
+		struct bpf_prog_priv *priv = bpf_program__priv(prog);
 		struct probe_trace_event *tev;
 		struct perf_probe_event *pev;
-		struct bpf_prog_priv *priv;
 		int i, fd;
 
-		err = bpf_program__get_private(prog,
-				(void **)&priv);
-		if (err || !priv) {
+		if (IS_ERR(priv) || !priv) {
 			pr_debug("bpf: failed to get private field\n");
 			return -BPF_LOADER_ERRNO__INTERNAL;
 		}
 
+		if (priv->is_tp) {
+			fd = bpf_program__fd(prog);
+			err = (*func)(priv->sys_name, priv->evt_name, fd, arg);
+			if (err) {
+				pr_debug("bpf: tracepoint call back failed, stop iterate\n");
+				return err;
+			}
+			continue;
+		}
+
 		pev = &priv->pev;
 		for (i = 0; i < pev->ntevs; i++) {
 			tev = &pev->tevs[i];
@@ -731,7 +783,7 @@ int bpf__foreach_tev(struct bpf_object *obj,
 				return fd;
 			}
 
-			err = (*func)(tev, fd, arg);
+			err = (*func)(tev->group, tev->event, fd, arg);
 			if (err) {
 				pr_debug("bpf: call back failed, stop iterate\n");
 				return err;
@@ -897,15 +949,12 @@ bpf_map_priv__clone(struct bpf_map_priv *priv)
 static int
 bpf_map__add_op(struct bpf_map *map, struct bpf_map_op *op)
 {
-	struct bpf_map_priv *priv;
-	const char *map_name;
-	int err;
+	const char *map_name = bpf_map__name(map);
+	struct bpf_map_priv *priv = bpf_map__priv(map);
 
-	map_name = bpf_map__get_name(map);
-	err = bpf_map__get_private(map, (void **)&priv);
-	if (err) {
+	if (IS_ERR(priv)) {
 		pr_debug("Failed to get private from map %s\n", map_name);
-		return err;
+		return PTR_ERR(priv);
 	}
 
 	if (!priv) {
@@ -916,7 +965,7 @@ bpf_map__add_op(struct bpf_map *map, struct bpf_map_op *op)
 		}
 		INIT_LIST_HEAD(&priv->ops_list);
 
-		if (bpf_map__set_private(map, priv, bpf_map_priv__clear)) {
+		if (bpf_map__set_priv(map, priv, bpf_map_priv__clear)) {
 			free(priv);
 			return -BPF_LOADER_ERRNO__INTERNAL;
 		}
@@ -948,30 +997,26 @@ static int
 __bpf_map__config_value(struct bpf_map *map,
 			struct parse_events_term *term)
 {
-	struct bpf_map_def def;
 	struct bpf_map_op *op;
-	const char *map_name;
-	int err;
+	const char *map_name = bpf_map__name(map);
+	const struct bpf_map_def *def = bpf_map__def(map);
 
-	map_name = bpf_map__get_name(map);
-
-	err = bpf_map__get_def(map, &def);
-	if (err) {
+	if (IS_ERR(def)) {
 		pr_debug("Unable to get map definition from '%s'\n",
 			 map_name);
 		return -BPF_LOADER_ERRNO__INTERNAL;
 	}
 
-	if (def.type != BPF_MAP_TYPE_ARRAY) {
+	if (def->type != BPF_MAP_TYPE_ARRAY) {
 		pr_debug("Map %s type is not BPF_MAP_TYPE_ARRAY\n",
 			 map_name);
 		return -BPF_LOADER_ERRNO__OBJCONF_MAP_TYPE;
 	}
-	if (def.key_size < sizeof(unsigned int)) {
+	if (def->key_size < sizeof(unsigned int)) {
 		pr_debug("Map %s has incorrect key size\n", map_name);
 		return -BPF_LOADER_ERRNO__OBJCONF_MAP_KEYSIZE;
 	}
-	switch (def.value_size) {
+	switch (def->value_size) {
 	case 1:
 	case 2:
 	case 4:
@@ -1014,12 +1059,10 @@ __bpf_map__config_event(struct bpf_map *map,
 			struct perf_evlist *evlist)
 {
 	struct perf_evsel *evsel;
-	struct bpf_map_def def;
+	const struct bpf_map_def *def;
 	struct bpf_map_op *op;
-	const char *map_name;
-	int err;
+	const char *map_name = bpf_map__name(map);
 
-	map_name = bpf_map__get_name(map);
 	evsel = perf_evlist__find_evsel_by_str(evlist, term->val.str);
 	if (!evsel) {
 		pr_debug("Event (for '%s') '%s' doesn't exist\n",
@@ -1027,18 +1070,18 @@ __bpf_map__config_event(struct bpf_map *map,
 		return -BPF_LOADER_ERRNO__OBJCONF_MAP_NOEVT;
 	}
 
-	err = bpf_map__get_def(map, &def);
-	if (err) {
+	def = bpf_map__def(map);
+	if (IS_ERR(def)) {
 		pr_debug("Unable to get map definition from '%s'\n",
 			 map_name);
-		return err;
+		return PTR_ERR(def);
 	}
 
 	/*
 	 * No need to check key_size and value_size:
 	 * kernel has already checked them.
 	 */
-	if (def.type != BPF_MAP_TYPE_PERF_EVENT_ARRAY) {
+	if (def->type != BPF_MAP_TYPE_PERF_EVENT_ARRAY) {
 		pr_debug("Map %s type is not BPF_MAP_TYPE_PERF_EVENT_ARRAY\n",
 			 map_name);
 		return -BPF_LOADER_ERRNO__OBJCONF_MAP_TYPE;
@@ -1087,9 +1130,8 @@ config_map_indices_range_check(struct parse_events_term *term,
 			       const char *map_name)
 {
 	struct parse_events_array *array = &term->array;
-	struct bpf_map_def def;
+	const struct bpf_map_def *def;
 	unsigned int i;
-	int err;
 
 	if (!array->nr_ranges)
 		return 0;
@@ -1099,8 +1141,8 @@ config_map_indices_range_check(struct parse_events_term *term,
 		return -BPF_LOADER_ERRNO__INTERNAL;
 	}
 
-	err = bpf_map__get_def(map, &def);
-	if (err) {
+	def = bpf_map__def(map);
+	if (IS_ERR(def)) {
 		pr_debug("ERROR: Unable to get map definition from '%s'\n",
 			 map_name);
 		return -BPF_LOADER_ERRNO__INTERNAL;
@@ -1111,7 +1153,7 @@ config_map_indices_range_check(struct parse_events_term *term,
 		size_t length = array->ranges[i].length;
 		unsigned int idx = start + length - 1;
 
-		if (idx >= def.max_entries) {
+		if (idx >= def->max_entries) {
 			pr_debug("ERROR: index %d too large\n", idx);
 			return -BPF_LOADER_ERRNO__OBJCONF_MAP_IDX2BIG;
 		}
@@ -1147,7 +1189,7 @@ bpf__obj_config_map(struct bpf_object *obj,
 		goto out;
 	}
 
-	map = bpf_object__get_map_by_name(obj, map_name);
+	map = bpf_object__find_map_by_name(obj, map_name);
 	if (!map) {
 		pr_debug("ERROR: Map %s doesn't exist\n", map_name);
 		err = -BPF_LOADER_ERRNO__OBJCONF_MAP_NOTEXIST;
@@ -1204,14 +1246,14 @@ out:
 }
 
 typedef int (*map_config_func_t)(const char *name, int map_fd,
-				 struct bpf_map_def *pdef,
+				 const struct bpf_map_def *pdef,
 				 struct bpf_map_op *op,
 				 void *pkey, void *arg);
 
 static int
 foreach_key_array_all(map_config_func_t func,
 		      void *arg, const char *name,
-		      int map_fd, struct bpf_map_def *pdef,
+		      int map_fd, const struct bpf_map_def *pdef,
 		      struct bpf_map_op *op)
 {
 	unsigned int i;
@@ -1231,7 +1273,7 @@ foreach_key_array_all(map_config_func_t func,
 static int
 foreach_key_array_ranges(map_config_func_t func, void *arg,
 			 const char *name, int map_fd,
-			 struct bpf_map_def *pdef,
+			 const struct bpf_map_def *pdef,
 			 struct bpf_map_op *op)
 {
 	unsigned int i, j;
@@ -1261,15 +1303,12 @@ bpf_map_config_foreach_key(struct bpf_map *map,
 			   void *arg)
 {
 	int err, map_fd;
-	const char *name;
 	struct bpf_map_op *op;
-	struct bpf_map_def def;
-	struct bpf_map_priv *priv;
+	const struct bpf_map_def *def;
+	const char *name = bpf_map__name(map);
+	struct bpf_map_priv *priv = bpf_map__priv(map);
 
-	name = bpf_map__get_name(map);
-
-	err = bpf_map__get_private(map, (void **)&priv);
-	if (err) {
+	if (IS_ERR(priv)) {
 		pr_debug("ERROR: failed to get private from map %s\n", name);
 		return -BPF_LOADER_ERRNO__INTERNAL;
 	}
@@ -1278,29 +1317,29 @@ bpf_map_config_foreach_key(struct bpf_map *map,
 		return 0;
 	}
 
-	err = bpf_map__get_def(map, &def);
-	if (err) {
+	def = bpf_map__def(map);
+	if (IS_ERR(def)) {
 		pr_debug("ERROR: failed to get definition from map %s\n", name);
 		return -BPF_LOADER_ERRNO__INTERNAL;
 	}
-	map_fd = bpf_map__get_fd(map);
+	map_fd = bpf_map__fd(map);
 	if (map_fd < 0) {
 		pr_debug("ERROR: failed to get fd from map %s\n", name);
 		return map_fd;
 	}
 
 	list_for_each_entry(op, &priv->ops_list, list) {
-		switch (def.type) {
+		switch (def->type) {
 		case BPF_MAP_TYPE_ARRAY:
 		case BPF_MAP_TYPE_PERF_EVENT_ARRAY:
 			switch (op->key_type) {
 			case BPF_MAP_KEY_ALL:
 				err = foreach_key_array_all(func, arg, name,
-							    map_fd, &def, op);
+							    map_fd, def, op);
 				break;
 			case BPF_MAP_KEY_RANGES:
 				err = foreach_key_array_ranges(func, arg, name,
-							       map_fd, &def,
+							       map_fd, def,
 							       op);
 				break;
 			default:
@@ -1410,7 +1449,7 @@ apply_config_evsel_for_key(const char *name, int map_fd, void *pkey,
 
 static int
 apply_obj_config_map_for_key(const char *name, int map_fd,
-			     struct bpf_map_def *pdef __maybe_unused,
+			     const struct bpf_map_def *pdef,
 			     struct bpf_map_op *op,
 			     void *pkey, void *arg __maybe_unused)
 {
@@ -1475,9 +1514,9 @@ int bpf__apply_obj_config(void)
 
 #define bpf__for_each_stdout_map(pos, obj, objtmp)	\
 	bpf__for_each_map(pos, obj, objtmp) 		\
-		if (bpf_map__get_name(pos) && 		\
+		if (bpf_map__name(pos) && 		\
 			(strcmp("__bpf_stdout__", 	\
-				bpf_map__get_name(pos)) == 0))
+				bpf_map__name(pos)) == 0))
 
 int bpf__setup_stdout(struct perf_evlist *evlist __maybe_unused)
 {
@@ -1489,10 +1528,9 @@ int bpf__setup_stdout(struct perf_evlist *evlist __maybe_unused)
 	bool need_init = false;
 
 	bpf__for_each_stdout_map(map, obj, tmp) {
-		struct bpf_map_priv *priv;
+		struct bpf_map_priv *priv = bpf_map__priv(map);
 
-		err = bpf_map__get_private(map, (void **)&priv);
-		if (err)
+		if (IS_ERR(priv))
 			return -BPF_LOADER_ERRNO__INTERNAL;
 
 		/*
@@ -1520,10 +1558,9 @@ int bpf__setup_stdout(struct perf_evlist *evlist __maybe_unused)
 	}
 
 	bpf__for_each_stdout_map(map, obj, tmp) {
-		struct bpf_map_priv *priv;
+		struct bpf_map_priv *priv = bpf_map__priv(map);
 
-		err = bpf_map__get_private(map, (void **)&priv);
-		if (err)
+		if (IS_ERR(priv))
 			return -BPF_LOADER_ERRNO__INTERNAL;
 		if (priv)
 			continue;
@@ -1533,7 +1570,7 @@ int bpf__setup_stdout(struct perf_evlist *evlist __maybe_unused)
 			if (!priv)
 				return -ENOMEM;
 
-			err = bpf_map__set_private(map, priv, bpf_map_priv__clear);
+			err = bpf_map__set_priv(map, priv, bpf_map_priv__clear);
 			if (err) {
 				bpf_map_priv__clear(map, priv);
 				return err;
@@ -1607,7 +1644,7 @@ bpf_loader_strerror(int err, char *buf, size_t size)
 		snprintf(buf, size, "Unknown bpf loader error %d", err);
 	else
 		snprintf(buf, size, "%s",
-			 strerror_r(err, sbuf, sizeof(sbuf)));
+			 str_error_r(err, sbuf, sizeof(sbuf)));
 
 	buf[size - 1] = '\0';
 	return -1;
@@ -1677,7 +1714,7 @@ int bpf__strerror_load(struct bpf_object *obj,
 {
 	bpf__strerror_head(err, buf, size);
 	case LIBBPF_ERRNO__KVER: {
-		unsigned int obj_kver = bpf_object__get_kversion(obj);
+		unsigned int obj_kver = bpf_object__kversion(obj);
 		unsigned int real_kver;
 
 		if (fetch_kernel_version(&real_kver, NULL, 0)) {