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

Pull perf fixes from Thomas Gleixner:
 - fix for do_div() abuse on x86
 - locking fix in perf core
 - a pile of (build) fixes and cleanups in perf tools

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (27 commits)
  perf/x86: Fix incorrect use of do_div() in NMI warning
  perf: Fix perf_lock_task_context() vs RCU
  perf: Remove WARN_ON_ONCE() check in __perf_event_enable() for valid scenario
  perf: Clone child context from parent context pmu
  perf script: Fix broken include in Context.xs
  perf tools: Fix -ldw/-lelf link test when static linking
  perf tools: Revert regression in configuration of Python support
  perf tools: Fix perf version generation
  perf stat: Fix per-socket output bug for uncore events
  perf symbols: Fix vdso list searching
  perf evsel: Fix missing increment in sample parsing
  perf tools: Update symbol_conf.nr_events when processing attribute events
  perf tools: Fix new_term() missing free on error path
  perf tools: Fix parse_events_terms() segfault on error path
  perf evsel: Fix count parameter to read call in event_format__new
  perf tools: fix a typo of a Power7 event name
  perf tools: Fix -x/--exclude-other option for report command
  perf evlist: Enhance perf_evlist__start_workload()
  perf record: Remove -f/--force option
  perf record: Remove -A/--append option
  ...

1 files changed, 3 insertions, 12 deletions

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 738d3b8..a4dafbe 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -2303,29 +2303,18 @@ int perf_session__write_header(struct perf_session *session,
 	struct perf_file_header f_header;
 	struct perf_file_attr   f_attr;
 	struct perf_header *header = &session->header;
-	struct perf_evsel *evsel, *pair = NULL;
+	struct perf_evsel *evsel;
 	int err;
 
 	lseek(fd, sizeof(f_header), SEEK_SET);
 
-	if (session->evlist != evlist)
-		pair = perf_evlist__first(session->evlist);
-
 	list_for_each_entry(evsel, &evlist->entries, node) {
 		evsel->id_offset = lseek(fd, 0, SEEK_CUR);
 		err = do_write(fd, evsel->id, evsel->ids * sizeof(u64));
 		if (err < 0) {
-out_err_write:
 			pr_debug("failed to write perf header\n");
 			return err;
 		}
-		if (session->evlist != evlist) {
-			err = do_write(fd, pair->id, pair->ids * sizeof(u64));
-			if (err < 0)
-				goto out_err_write;
-			evsel->ids += pair->ids;
-			pair = perf_evsel__next(pair);
-		}
 	}
 
 	header->attr_offset = lseek(fd, 0, SEEK_CUR);
@@ -2967,6 +2956,8 @@ int perf_event__process_attr(union perf_event *event,
 		perf_evlist__id_add(evlist, evsel, 0, i, event->attr.id[i]);
 	}
 
+	symbol_conf.nr_events = evlist->nr_entries;
+
 	return 0;
 }