diff --git a/drivers/mtd/tests/mtd_subpagetest.c b/drivers/mtd/tests/mtd_subpagetest.c
index 4c5e04d0b3286acdc0cab34108e5a8e53ab1ed95..5b889724268ed020a04fcf0d9732aa6daf9743fe 100644
--- a/drivers/mtd/tests/mtd_subpagetest.c
+++ b/drivers/mtd/tests/mtd_subpagetest.c
@@ -125,7 +125,7 @@ static int write_eraseblock(int ebnum)
 		       (long long)addr);
 		if (written != subpgsize) {
 			printk(PRINT_PREF "  write size: %#x\n", subpgsize);
-			printk(PRINT_PREF "  written: %#x\n", written);
+			printk(PRINT_PREF "  written: %#zx\n", written);
 		}
 		return err ? err : -1;
 	}
@@ -139,7 +139,7 @@ static int write_eraseblock(int ebnum)
 		       (long long)addr);
 		if (written != subpgsize) {
 			printk(PRINT_PREF "  write size: %#x\n", subpgsize);
-			printk(PRINT_PREF "  written: %#x\n", written);
+			printk(PRINT_PREF "  written: %#zx\n", written);
 		}
 		return err ? err : -1;
 	}
@@ -164,7 +164,7 @@ static int write_eraseblock2(int ebnum)
 			if (written != subpgsize) {
 				printk(PRINT_PREF "  write size: %#x\n",
 				       subpgsize * k);
-				printk(PRINT_PREF "  written: %#08x\n",
+				printk(PRINT_PREF "  written: %#08zx\n",
 				       written);
 			}
 			return err ? err : -1;
diff --git a/drivers/mtd/tests/mtd_torturetest.c b/drivers/mtd/tests/mtd_torturetest.c
index 2928d9e84eae523359759e3b1aec3faa3778f0f2..631a0ab3a33c506ef575fff3b5e5fd1769f3e6f6 100644
--- a/drivers/mtd/tests/mtd_torturetest.c
+++ b/drivers/mtd/tests/mtd_torturetest.c
@@ -450,7 +450,7 @@ static void report_corrupt(unsigned char *read, unsigned char *written)
 		printk("-------------------------------------------------------"
 		       "----------------------------------\n");
 
-		printk(PRINT_PREF "Page %d has %d bytes/%d bits failing verify,"
+		printk(PRINT_PREF "Page %zd has %d bytes/%d bits failing verify,"
 		       " starting at offset 0x%x\n",
 		       (mtd->erasesize - check_len + i) / pgsize,
 		       bytes, bits, first);