diff --git a/arch/arm/boards/eukrea_cpuimx35/eukrea_cpuimx35.c b/arch/arm/boards/eukrea_cpuimx35/eukrea_cpuimx35.c
index 912e13c..9df2d64 100644
--- a/arch/arm/boards/eukrea_cpuimx35/eukrea_cpuimx35.c
+++ b/arch/arm/boards/eukrea_cpuimx35/eukrea_cpuimx35.c
@@ -347,7 +347,7 @@
 		return COMMAND_ERROR_USAGE;
 	}
 
-	printf("Switched CPU frequency to %ldMHz\n", freq);
+	printf("Switched CPU frequency to %luMHz\n", freq);
 
 	return 0;
 }
diff --git a/arch/arm/boards/guf-cupid/board.c b/arch/arm/boards/guf-cupid/board.c
index 127edaa..356bf56 100644
--- a/arch/arm/boards/guf-cupid/board.c
+++ b/arch/arm/boards/guf-cupid/board.c
@@ -341,7 +341,7 @@
 		return COMMAND_ERROR_USAGE;
 	}
 
-	printf("Switched CPU frequency to %ldMHz\n", freq);
+	printf("Switched CPU frequency to %luMHz\n", freq);
 
 	return 0;
 }
diff --git a/arch/arm/boards/phytec-phycore-imx35/pcm043.c b/arch/arm/boards/phytec-phycore-imx35/pcm043.c
index c1928cc..6abfc92 100644
--- a/arch/arm/boards/phytec-phycore-imx35/pcm043.c
+++ b/arch/arm/boards/phytec-phycore-imx35/pcm043.c
@@ -319,7 +319,7 @@
 		return COMMAND_ERROR_USAGE;
 	}
 
-	printf("Switched CPU frequency to %ldMHz\n", freq);
+	printf("Switched CPU frequency to %luMHz\n", freq);
 
 	return 0;
 }
diff --git a/arch/arm/mach-imx/imx-bbu-internal.c b/arch/arm/mach-imx/imx-bbu-internal.c
index 9861c07..308a0bd 100644
--- a/arch/arm/mach-imx/imx-bbu-internal.c
+++ b/arch/arm/mach-imx/imx-bbu-internal.c
@@ -281,12 +281,12 @@
 		}
 	}
 
-	debug("total image size: 0x%08x. Space needed including bad blocks: 0x%08x\n",
+	debug("total image size: 0x%08zx. Space needed including bad blocks: 0x%08zx\n",
 			data->len + 0x8000,
 			data->len + 0x8000 + *num_bb * blocksize);
 
 	if (data->len + 0x8000 + *num_bb * blocksize > imx_handler->device_size) {
-		printf("needed space (0x%08x) exceeds partition space (0x%08x)\n",
+		printf("needed space (0x%08zx) exceeds partition space (0x%08zx)\n",
 				data->len + 0x8000 + *num_bb * blocksize,
 				imx_handler->device_size);
 		ret = -ENOSPC;
diff --git a/commands/nandtest.c b/commands/nandtest.c
index c64f244..373ee2c 100644
--- a/commands/nandtest.c
+++ b/commands/nandtest.c
@@ -161,7 +161,7 @@
 			* nr_passes);
 
 	for (i = 0; i < MAX_ECC_BITS; i++)
-		printf("ECC %d bit error(s)	: %d\n", i + 1, ecc_stats[i]);
+		printf("ECC %d bit error(s)	: %u\n", i + 1, ecc_stats[i]);
 
 	printf("ECC >%d bit error(s)	: %u\n", MAX_ECC_BITS, ecc_stats_over);
 	printf("ECC corrections failed	: %u\n", ecc_failed_cnt);
diff --git a/commands/time.c b/commands/time.c
index 2cc3292..ffd3062 100644
--- a/commands/time.c
+++ b/commands/time.c
@@ -37,7 +37,7 @@
 
 	diff = diff64;
 
-	printf("time: %ldms\n", diff);
+	printf("time: %lums\n", diff);
 
 	free(buf);
 
diff --git a/common/tlsf_malloc.c b/common/tlsf_malloc.c
index cd01b56..aa8fc13 100644
--- a/common/tlsf_malloc.c
+++ b/common/tlsf_malloc.c
@@ -97,5 +97,5 @@
 
 	tlsf_walk_heap(tlsf_mem_pool, malloc_walker, &s);
 
-	printf("used: %10d\nfree: %10d\n", s.used, s.free);
+	printf("used: %10zu\nfree: %10zu\n", s.used, s.free);
 }
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 0d25941..23b1a7a 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -428,7 +428,7 @@
 {
 	struct clk *c;
 
-	printf("%*s%s (rate %ld, %sabled)\n", indent * 4, "", clk->name, clk_get_rate(clk),
+	printf("%*s%s (rate %lu, %sabled)\n", indent * 4, "", clk->name, clk_get_rate(clk),
 			clk_is_enabled(clk) ? "en" : "dis");
 	if (verbose) {
 
diff --git a/drivers/misc/jtag.c b/drivers/misc/jtag.c
index 310da81..f5d0c72 100644
--- a/drivers/misc/jtag.c
+++ b/drivers/misc/jtag.c
@@ -276,7 +276,7 @@
 	struct jtag_info *info = pdev->priv;
 
 	printf(" JTAG:\n");
-	printf("  Devices found: %d\n", info->devices);
+	printf("  Devices found: %u\n", info->devices);
 	for (dn = 0; dn < info->devices; dn++) {
 		jid.device = dn;
 		ret = jtag_ioctl(&info->cdev, JTAG_GET_ID, &jid);
diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index fe1ac02..9c1571d 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -706,12 +706,12 @@
 
 	if (tmp > USB_BUFSIZ) {
 		USB_PRINTF("usb_get_configuration_no: failed to get " \
-			   "descriptor - too long: %d\n", tmp);
+			   "descriptor - too long: %u\n", tmp);
 		return -1;
 	}
 
 	result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, tmp);
-	USB_PRINTF("get_conf_no %d Result %d, wLength %d\n",
+	USB_PRINTF("get_conf_no %d Result %d, wLength %u\n",
 		   cfgno, result, tmp);
 	return result;
 }
diff --git a/lib/display_options.c b/lib/display_options.c
index 0871552..2d695e4 100644
--- a/lib/display_options.c
+++ b/lib/display_options.c
@@ -62,7 +62,7 @@
 
 	ptr += sprintf(buf, "%lu", n);
 	if (m) {
-		ptr += sprintf(ptr, ".%ld", m);
+		ptr += sprintf(ptr, ".%lu", m);
 	}
 	sprintf(ptr, " %ciB", c);
 
diff --git a/lib/gui/picopng.c b/lib/gui/picopng.c
index 77cd81c..3c0659f 100644
--- a/lib/gui/picopng.c
+++ b/lib/gui/picopng.c
@@ -800,7 +800,7 @@
 #ifdef ALLOC_DEBUG
 	png_alloc_node_t *node;
 	for (node = png_alloc_head, n = 1; node; node = node->next, n++)
-		printf("node %d (%p) addr = %p, size = %ld\n", n, node, node->addr, node->size);
+		printf("node %d (%p) addr = %p, size = %zu\n", n, node, node->addr, node->size);
 #endif
 	png_alloc_free_all(); // also frees info and image data from PNG_decode
 
diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c
index b3591a9..9392f09 100644
--- a/scripts/kallsyms.c
+++ b/scripts/kallsyms.c
@@ -286,7 +286,7 @@
 	printf("\n");
 
 	output_label("kallsyms_num_syms");
-	printf("\tPTR\t%d\n", table_cnt);
+	printf("\tPTR\t%u\n", table_cnt);
 	printf("\n");
 
 	/* table of offset markers, that give the offset in the compressed stream
@@ -315,7 +315,7 @@
 
 	output_label("kallsyms_markers");
 	for (i = 0; i < ((table_cnt + 255) >> 8); i++)
-		printf("\tPTR\t%d\n", markers[i]);
+		printf("\tPTR\t%u\n", markers[i]);
 	printf("\n");
 
 	free(markers);
@@ -332,7 +332,7 @@
 
 	output_label("kallsyms_token_index");
 	for (i = 0; i < 256; i++)
-		printf("\t.short\t%d\n", best_idx[i]);
+		printf("\t.short\t%u\n", best_idx[i]);
 	printf("\n");
 }
 
diff --git a/scripts/kwbimage.c b/scripts/kwbimage.c
index f8abeb1..5b8e738 100644
--- a/scripts/kwbimage.c
+++ b/scripts/kwbimage.c
@@ -1265,7 +1265,7 @@
 		struct image_cfg_element *e = &image_cfg[cfgi];
 		switch (e->type) {
 		case IMAGE_CFG_VERSION:
-			printf("VERSION %d\n", e->version);
+			printf("VERSION %u\n", e->version);
 			break;
 		case IMAGE_CFG_BOOT_FROM:
 			printf("BOOTFROM %s\n",