pie: Formatting and typo fixes

Also remove the cast of a pointer-to-void variable to the type
it already is.
Signed-off-by: Christopher Covington <cov@codeaurora.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

pie/parasite.c

@@ -510,7 +510,7 @@ static int __parasite_daemon_wait_msg(struct ctl_msg *m)
 {
 	int ret;
 
-	pr_debug("Daemon wais for command\n");
+	pr_debug("Daemon waits for command\n");
 
 	while (1) {
 		*m = (struct ctl_msg){ };
@@ -645,8 +645,8 @@ static noinline int unmap_itself(void *data)
 
 	sys_munmap(args->parasite_start, args->parasite_len);
 	/*
-	 * sys_munmap never return back. The controll process must
-	 * trap us on the exit from munmap
+	 * This call to sys_munmap must never return. Instead, the controlling
+	 * process must trap us on the exit from munmap.
 	 */
 
 	BUG();

pie/restorer.c

@@ -440,7 +440,7 @@ long __export_restore_thread(struct thread_restore_args *args)
 	restore_pdeath_sig(args);
 
 	if (args->ta->seccomp_mode != SECCOMP_MODE_DISABLED)
-		pr_info("restoring seccomp mode %d for %ld\n", args->ta->seccomp_mode, sys_getpid());
+		pr_info("Restoring seccomp mode %d for %ld\n", args->ta->seccomp_mode, sys_getpid());
 
 	restore_finish_stage(CR_STATE_RESTORE_CREDS);
 	futex_dec_and_wake(&thread_inprogress);
@@ -742,7 +742,7 @@ static int unmap_old_vmas(void *premmapped_addr, unsigned long premmapped_len,
 	void *p1, *p2;
 	int ret;
 
-	if ((void *) premmapped_addr < bootstrap_start) {
+	if (premmapped_addr < bootstrap_start) {
 		p1 = premmapped_addr;
 		s1 = premmapped_len;
 		p2 = bootstrap_start;