diff --git a/arch/i386/mm/pageattr.c b/arch/i386/mm/pageattr.c
index ad91528..e223b1d 100644
--- a/arch/i386/mm/pageattr.c
+++ b/arch/i386/mm/pageattr.c
@@ -224,7 +224,7 @@
 	list_replace_init(&df_list, &l);
 	spin_unlock_irq(&cpa_lock);
 	if (!cpu_has_clflush)
-		flush_map(0);
+		flush_map(NULL);
 	list_for_each_entry_safe(pg, next, &l, lru) {
 		if (cpu_has_clflush)
 			flush_map(page_address(pg));
diff --git a/drivers/char/watchdog/machzwd.c b/drivers/char/watchdog/machzwd.c
index 276577d..4d730fd 100644
--- a/drivers/char/watchdog/machzwd.c
+++ b/drivers/char/watchdog/machzwd.c
@@ -325,7 +325,7 @@
 			return put_user(0, p);
 
 		case WDIOC_KEEPALIVE:
-			zf_ping(0);
+			zf_ping(NULL);
 			break;
 
 		default:
diff --git a/drivers/kvm/mmu.c b/drivers/kvm/mmu.c
index 22c426c..be79377 100644
--- a/drivers/kvm/mmu.c
+++ b/drivers/kvm/mmu.c
@@ -333,7 +333,7 @@
 	for (j = RMAP_EXT - 1; !desc->shadow_ptes[j] && j > i; --j)
 		;
 	desc->shadow_ptes[i] = desc->shadow_ptes[j];
-	desc->shadow_ptes[j] = 0;
+	desc->shadow_ptes[j] = NULL;
 	if (j != 0)
 		return;
 	if (!prev_desc && !desc->more)