diff --git a/fs/exec.c b/fs/exec.c
index 52acff3f44f0..e56ee2437025 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -869,9 +869,11 @@ int flush_old_exec(struct linux_binprm * bprm)
 	if (current->euid == current->uid && current->egid == current->gid)
 		current->mm->dumpable = 1;
 	name = bprm->filename;
+
+	/* Copies the binary name from after last slash */
 	for (i=0; (ch = *(name++)) != '\0';) {
 		if (ch == '/')
-			i = 0;
+			i = 0; /* overwrite what we wrote */
 		else
 			if (i < (sizeof(tcomm) - 1))
 				tcomm[i++] = ch;
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 5f868a588581..4dbb109022f3 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -578,7 +578,7 @@ struct task_struct {
 	unsigned long flags;	/* per process flags, defined below */
 	unsigned long ptrace;
 
-	int lock_depth;		/* Lock depth */
+	int lock_depth;		/* BKL lock depth */
 
 	int prio, static_prio;
 	struct list_head run_list;
@@ -661,7 +661,10 @@ struct task_struct {
 	struct key *thread_keyring;	/* keyring private to this thread */
 #endif
 	int oomkilladj; /* OOM kill score adjustment (bit shift). */
-	char comm[TASK_COMM_LEN];
+	char comm[TASK_COMM_LEN]; /* executable name excluding path
+				     - access with [gs]et_task_comm (which lock
+				       it with task_lock())
+				     - initialized normally by flush_old_exec */
 /* file system info */
 	int link_count, total_link_count;
 /* ipc stuff */