diff --git a/drivers/watchdog/diag288_wdt.c b/drivers/watchdog/diag288_wdt.c
index 887d5a6c155b95..656b937f76534f 100644
--- a/drivers/watchdog/diag288_wdt.c
+++ b/drivers/watchdog/diag288_wdt.c
@@ -6,10 +6,10 @@
  * to CP.
  *
  * The command can be altered using the module parameter "cmd". This is
- * not recommended because it's only supported on z/VM but not whith LPAR.
+ * not recommended because it's only supported on z/VM but not with LPAR.
  *
- * On LPAR, the watchdog will always trigger a system restart. the module
- * paramter cmd is meaningless here.
+ * On LPAR, the watchdog will always trigger a system restart. The module
+ * parameter cmd is meaningless here.
  *
  *
  * Copyright IBM Corp. 2004, 2013
diff --git a/include/drm/drm_plane.h b/include/drm/drm_plane.h
index 01479dd94e76a8..90006a811d5733 100644
--- a/include/drm/drm_plane.h
+++ b/include/drm/drm_plane.h
@@ -295,7 +295,7 @@ struct drm_plane_funcs {
 	 *
 	 * This is the legacy entry point to enable and configure the plane for
 	 * the given CRTC and framebuffer. It is never called to disable the
-	 * plane, i.e. the passed-in crtc and fb paramters are never NULL.
+	 * plane, i.e. the passed-in crtc and fb parameters are never NULL.
 	 *
 	 * The source rectangle in frame buffer memory coordinates is given by
 	 * the src_x, src_y, src_w and src_h parameters (as 16.16 fixed point
diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt
index 28bec7e78bc858..e136ca35d38080 100644
--- a/tools/perf/Documentation/perf-script.txt
+++ b/tools/perf/Documentation/perf-script.txt
@@ -262,7 +262,7 @@ OPTIONS
 	is printed. This is the full execution path leading to the sample. This is only supported when the
 	sample was recorded with perf record -b or -j any.
 
-	Use brstackinsnlen to print the brstackinsn lenght. For example, you
+	Use brstackinsnlen to print the brstackinsn length. For example, you
 	can’t know the next sequential instruction after an unconditional branch unless
 	you calculate that based on its length.
 
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index c607f39b8c8bb0..ae5fabf91c966f 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -4291,7 +4291,10 @@ static int trace__expand_filter(struct trace *trace, struct evsel *evsel)
 
 				if (fmt->strtoul(right, right_size, &syscall_arg, &val)) {
 					char *n, expansion[19];
-					int expansion_lenght = scnprintf(expansion, sizeof(expansion), "%#" PRIx64, val);
+					int expansion_length;
+
+					expansion_length = scnprintf(expansion, sizeof(expansion),
+								     "%#" PRIx64, val);
 					int expansion_offset = right - new_filter;
 
 					pr_debug("%s", expansion);
@@ -4303,7 +4306,7 @@ static int trace__expand_filter(struct trace *trace, struct evsel *evsel)
 					}
 					if (new_filter != evsel->filter)
 						free(new_filter);
-					left = n + expansion_offset + expansion_lenght;
+					left = n + expansion_offset + expansion_length;
 					new_filter = n;
 				} else {
 					pr_err("\"%.*s\" not found for \"%s\" in \"%s\", can't set filter \"%s\"\n",