tools/perf: Fix misspellings in comments.

Signed-off-by: Adam Buchbinder <adam.buchbinder@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 738ce22..846d633 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -826,7 +826,7 @@
 		perf_evsel__set_sample_bit(evsel, PERIOD);
 
 	/*
-	 * When the user explicitely disabled time don't force it here.
+	 * When the user explicitly disabled time don't force it here.
 	 */
 	if (opts->sample_time &&
 	    (!perf_missing_features.sample_id_all &&
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 80b9b6a..2fa6d25 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -361,7 +361,7 @@
 }
 
 /*
- * Caller must eventually drop thread->refcnt returned with a successfull
+ * Caller must eventually drop thread->refcnt returned with a successful
  * lookup/new thread inserted.
  */
 static struct thread *____machine__findnew_thread(struct machine *machine,
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 4c19d5e..696e8da 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -1649,7 +1649,7 @@
 
 		buf = _buf;
 
-		/* We're cutting from the beggining. */
+		/* We're cutting from the beginning. */
 		if (err->idx > max_err_idx)
 			cut = err->idx - max_err_idx;
 
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 4abd85c..9bd8d6c 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -555,7 +555,7 @@
 
 /*
  * XXX this is hack in attempt to carry flags bitfield
- * throught endian village. ABI says:
+ * through endian village. ABI says:
  *
  * Bit-fields are allocated from right to left (least to most significant)
  * on little-endian implementations and from left to right (most to least