Subject: [PATCH v1] ACPI: Switch to use generic UUID API

From: Andy Shevchenko <[email-masked]>
Date: Thu, 4 May 2017 12:21:51 +0300

acpi_evaluate_dsm() and friends take a pointer to a raw buffer of 16
bytes. Instead we convert them to use uuid_le type. At the same time we
convert current users.

acpi_str_to_uuid() becomes useless after the conversion and it's safe to
get rid of it.

The conversion fixes a potential bug in int340x_thermal as well since
we have to use memcmp() on binary data.

Cc: Rafael J. Wysocki <[email-masked]>
Cc: Mika Westerberg <[email-masked]>
Cc: Borislav Petkov <[email-masked]>
Cc: Dan Williams <[email-masked]>
Cc: Amir Goldstein <[email-masked]>
Cc: Jarkko Sakkinen <[email-masked]>
Cc: Jani Nikula <[email-masked]>
Cc: Ben Skeggs <[email-masked]>
Cc: Benjamin Tissoires <[email-masked]>
Cc: Joerg Roedel <[email-masked]>
Cc: Adrian Hunter <[email-masked]>
Cc: Yisen Zhuang <[email-masked]>
Cc: Bjorn Helgaas <[email-masked]>
Cc: Zhang Rui <[email-masked]>
Cc: Felipe Balbi <[email-masked]>
Cc: Mathias Nyman <[email-masked]>
Cc: Heikki Krogerus <[email-masked]>
Cc: Liam Girdwood <[email-masked]>
Cc: Mark Brown <[email-masked]>
Signed-off-by: Andy Shevchenko <[email-masked]>
---
 drivers/acpi/acpi_extlog.c                         | 10 +++---
 drivers/acpi/bus.c                                 | 29 ++--------------
 drivers/acpi/nfit/core.c                           | 40 +++++++++++-----------
 drivers/acpi/nfit/nfit.h                           |  3 +-
 drivers/acpi/utils.c                               |  4 +--
 drivers/char/tpm/tpm_crb.c                         |  9 +++--
 drivers/char/tpm/tpm_ppi.c                         | 20 +++++------
 drivers/gpu/drm/i915/intel_acpi.c                  | 14 +++-----
 drivers/gpu/drm/nouveau/nouveau_acpi.c             | 20 +++++------
 drivers/gpu/drm/nouveau/nvkm/subdev/mxm/base.c     |  9 +++--
 drivers/hid/i2c-hid/i2c-hid.c                      |  9 +++--
 drivers/iommu/dmar.c                               | 11 +++---
 drivers/mmc/host/sdhci-pci-core.c                  |  9 +++--
 drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c | 15 ++++----
 drivers/pci/pci-acpi.c                             | 11 +++---
 drivers/pci/pci-label.c                            |  4 +--
 drivers/thermal/int340x_thermal/int3400_thermal.c  |  8 ++---
 drivers/usb/dwc3/dwc3-pci.c                        |  6 ++--
 drivers/usb/host/xhci-pci.c                        |  9 +++--
 drivers/usb/misc/ucsi.c                            |  2 +-
 drivers/usb/typec/typec_wcove.c                    |  4 +--
 include/acpi/acpi_bus.h                            |  9 ++---
 include/linux/acpi.h                               |  4 +--
 include/linux/pci-acpi.h                           |  2 +-
 sound/soc/intel/skylake/skl-nhlt.c                 |  7 ++--
 tools/testing/nvdimm/test/iomap.c                  |  2 +-
 tools/testing/nvdimm/test/nfit.c                   |  2 +-
 27 files changed, 116 insertions(+), 156 deletions(-)

diff --git a/drivers/acpi/acpi_extlog.c b/drivers/acpi/acpi_extlog.c
index 502ea4dc2080..69d6140b6afa 100644
--- a/drivers/acpi/acpi_extlog.c
+++ b/drivers/acpi/acpi_extlog.c
@@ -182,17 +182,17 @@ static int extlog_print(struct notifier_block *nb, unsigned long val,
 
 static bool __init extlog_get_l1addr(void)
 {
-	u8 uuid[16];
+	uuid_le uuid;
 	acpi_handle handle;
 	union acpi_object *obj;
 
-	acpi_str_to_uuid(extlog_dsm_uuid, uuid);
-
+	if (uuid_le_to_bin(extlog_dsm_uuid, &uuid))
+		return false;
 	if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
 		return false;
-	if (!acpi_check_dsm(handle, uuid, EXTLOG_DSM_REV, 1 << EXTLOG_FN_ADDR))
+	if (!acpi_check_dsm(handle, &uuid, EXTLOG_DSM_REV, 1 << EXTLOG_FN_ADDR))
 		return false;
-	obj = acpi_evaluate_dsm_typed(handle, uuid, EXTLOG_DSM_REV,
+	obj = acpi_evaluate_dsm_typed(handle, &uuid, EXTLOG_DSM_REV,
 				      EXTLOG_FN_ADDR, NULL, ACPI_TYPE_INTEGER);
 	if (!obj) {
 		return false;
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 784bda663d16..e8130a4873e9 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -196,42 +196,19 @@ static void acpi_print_osc_error(acpi_handle handle,
 	pr_debug("\n");
 }
 
-acpi_status acpi_str_to_uuid(char *str, u8 *uuid)
-{
-	int i;
-	static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21,
-		24, 26, 28, 30, 32, 34};
-
-	if (strlen(str) != 36)
-		return AE_BAD_PARAMETER;
-	for (i = 0; i < 36; i++) {
-		if (i == 8 || i == 13 || i == 18 || i == 23) {
-			if (str[i] != '-')
-				return AE_BAD_PARAMETER;
-		} else if (!isxdigit(str[i]))
-			return AE_BAD_PARAMETER;
-	}
-	for (i = 0; i < 16; i++) {
-		uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4;
-		uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]);
-	}
-	return AE_OK;
-}
-EXPORT_SYMBOL_GPL(acpi_str_to_uuid);
-
 acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context)
 {
 	acpi_status status;
 	struct acpi_object_list input;
 	union acpi_object in_params[4];
 	union acpi_object *out_obj;
-	u8 uuid[16];
+	uuid_le uuid;
 	u32 errors;
 	struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
 
 	if (!context)
 		return AE_ERROR;
-	if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid)))
+	if (uuid_le_to_bin(context->uuid_str, &uuid))
 		return AE_ERROR;
 	context->ret.length = ACPI_ALLOCATE_BUFFER;
 	context->ret.pointer = NULL;
@@ -241,7 +218,7 @@ acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context)
 	input.pointer = in_params;
 	in_params[0].type 		= ACPI_TYPE_BUFFER;
 	in_params[0].buffer.length 	= 16;
-	in_params[0].buffer.pointer	= uuid;
+	in_params[0].buffer.pointer	= (u8 *)&uuid;
 	in_params[1].type 		= ACPI_TYPE_INTEGER;
 	in_params[1].integer.value 	= context->rev;
 	in_params[2].type 		= ACPI_TYPE_INTEGER;
diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
index 0f7982a1caaf..bd3e45ede056 100644
--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -74,11 +74,11 @@ struct nfit_table_prev {
 	struct list_head flushes;
 };
 
-static u8 nfit_uuid[NFIT_UUID_MAX][16];
+static uuid_le nfit_uuid[NFIT_UUID_MAX];
 
-const u8 *to_nfit_uuid(enum nfit_uuids id)
+const uuid_le *to_nfit_uuid(enum nfit_uuids id)
 {
-	return nfit_uuid[id];
+	return &nfit_uuid[id];
 }
 EXPORT_SYMBOL(to_nfit_uuid);
 
@@ -207,7 +207,7 @@ int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm,
 	u32 offset, fw_status = 0;
 	acpi_handle handle;
 	unsigned int func;
-	const u8 *uuid;
+	const uuid_le *uuid;
 	int rc, i;
 
 	func = cmd;
@@ -394,7 +394,7 @@ int nfit_spa_type(struct acpi_nfit_system_address *spa)
 	int i;
 
 	for (i = 0; i < NFIT_UUID_MAX; i++)
-		if (memcmp(to_nfit_uuid(i), spa->range_guid, 16) == 0)
+		if (!uuid_le_cmp_pp(to_nfit_uuid(i), (uuid_le *)spa->range_guid))
 			return i;
 	return -1;
 }
@@ -1400,7 +1400,7 @@ static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc,
 	struct acpi_device *adev, *adev_dimm;
 	struct device *dev = acpi_desc->dev;
 	unsigned long dsm_mask;
-	const u8 *uuid;
+	const uuid_le *uuid = to_nfit_uuid(NFIT_DEV_DIMM);
 	int i;
 	int family = -1;
 
@@ -1596,7 +1596,7 @@ static int acpi_nfit_register_dimms(struct acpi_nfit_desc *acpi_desc)
 static void acpi_nfit_init_dsms(struct acpi_nfit_desc *acpi_desc)
 {
 	struct nvdimm_bus_descriptor *nd_desc = &acpi_desc->nd_desc;
-	const u8 *uuid = to_nfit_uuid(NFIT_DEV_BUS);
+	const uuid_le *uuid = to_nfit_uuid(NFIT_DEV_BUS);
 	struct acpi_device *adev;
 	int i;
 
@@ -3036,19 +3036,19 @@ static __init int nfit_init(void)
 	BUILD_BUG_ON(sizeof(struct acpi_nfit_control_region) != 80);
 	BUILD_BUG_ON(sizeof(struct acpi_nfit_data_region) != 40);
 
-	acpi_str_to_uuid(UUID_VOLATILE_MEMORY, nfit_uuid[NFIT_SPA_VOLATILE]);
-	acpi_str_to_uuid(UUID_PERSISTENT_MEMORY, nfit_uuid[NFIT_SPA_PM]);
-	acpi_str_to_uuid(UUID_CONTROL_REGION, nfit_uuid[NFIT_SPA_DCR]);
-	acpi_str_to_uuid(UUID_DATA_REGION, nfit_uuid[NFIT_SPA_BDW]);
-	acpi_str_to_uuid(UUID_VOLATILE_VIRTUAL_DISK, nfit_uuid[NFIT_SPA_VDISK]);
-	acpi_str_to_uuid(UUID_VOLATILE_VIRTUAL_CD, nfit_uuid[NFIT_SPA_VCD]);
-	acpi_str_to_uuid(UUID_PERSISTENT_VIRTUAL_DISK, nfit_uuid[NFIT_SPA_PDISK]);
-	acpi_str_to_uuid(UUID_PERSISTENT_VIRTUAL_CD, nfit_uuid[NFIT_SPA_PCD]);
-	acpi_str_to_uuid(UUID_NFIT_BUS, nfit_uuid[NFIT_DEV_BUS]);
-	acpi_str_to_uuid(UUID_NFIT_DIMM, nfit_uuid[NFIT_DEV_DIMM]);
-	acpi_str_to_uuid(UUID_NFIT_DIMM_N_HPE1, nfit_uuid[NFIT_DEV_DIMM_N_HPE1]);
-	acpi_str_to_uuid(UUID_NFIT_DIMM_N_HPE2, nfit_uuid[NFIT_DEV_DIMM_N_HPE2]);
-	acpi_str_to_uuid(UUID_NFIT_DIMM_N_MSFT, nfit_uuid[NFIT_DEV_DIMM_N_MSFT]);
+	uuid_le_to_bin(UUID_VOLATILE_MEMORY, &nfit_uuid[NFIT_SPA_VOLATILE]);
+	uuid_le_to_bin(UUID_PERSISTENT_MEMORY, &nfit_uuid[NFIT_SPA_PM]);
+	uuid_le_to_bin(UUID_CONTROL_REGION, &nfit_uuid[NFIT_SPA_DCR]);
+	uuid_le_to_bin(UUID_DATA_REGION, &nfit_uuid[NFIT_SPA_BDW]);
+	uuid_le_to_bin(UUID_VOLATILE_VIRTUAL_DISK, &nfit_uuid[NFIT_SPA_VDISK]);
+	uuid_le_to_bin(UUID_VOLATILE_VIRTUAL_CD, &nfit_uuid[NFIT_SPA_VCD]);
+	uuid_le_to_bin(UUID_PERSISTENT_VIRTUAL_DISK, &nfit_uuid[NFIT_SPA_PDISK]);
+	uuid_le_to_bin(UUID_PERSISTENT_VIRTUAL_CD, &nfit_uuid[NFIT_SPA_PCD]);
+	uuid_le_to_bin(UUID_NFIT_BUS, &nfit_uuid[NFIT_DEV_BUS]);
+	uuid_le_to_bin(UUID_NFIT_DIMM, &nfit_uuid[NFIT_DEV_DIMM]);
+	uuid_le_to_bin(UUID_NFIT_DIMM_N_HPE1, &nfit_uuid[NFIT_DEV_DIMM_N_HPE1]);
+	uuid_le_to_bin(UUID_NFIT_DIMM_N_HPE2, &nfit_uuid[NFIT_DEV_DIMM_N_HPE2]);
+	uuid_le_to_bin(UUID_NFIT_DIMM_N_MSFT, &nfit_uuid[NFIT_DEV_DIMM_N_MSFT]);
 
 	nfit_wq = create_singlethread_workqueue("nfit");
 	if (!nfit_wq)
diff --git a/drivers/acpi/nfit/nfit.h b/drivers/acpi/nfit/nfit.h
index 58fb7d68e04a..2f233b28709f 100644
--- a/drivers/acpi/nfit/nfit.h
+++ b/drivers/acpi/nfit/nfit.h
@@ -18,7 +18,6 @@
 #include <linux/libnvdimm.h>
 #include <linux/ndctl.h>
 #include <linux/types.h>
-#include <linux/uuid.h>
 #include <linux/acpi.h>
 #include <acpi/acuuid.h>
 
@@ -237,7 +236,7 @@ static inline struct acpi_nfit_desc *to_acpi_desc(
 	return container_of(nd_desc, struct acpi_nfit_desc, nd_desc);
 }
 
-const u8 *to_nfit_uuid(enum nfit_uuids id);
+const uuid_le *to_nfit_uuid(enum nfit_uuids id);
 int acpi_nfit_init(struct acpi_nfit_desc *acpi_desc, void *nfit, acpi_size sz);
 void acpi_nfit_shutdown(void *data);
 void __acpi_nfit_notify(struct device *dev, acpi_handle handle, u32 event);
diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c
index 27d0dcfcf47d..bbe8a950e508 100644
--- a/drivers/acpi/utils.c
+++ b/drivers/acpi/utils.c
@@ -625,7 +625,7 @@ acpi_status acpi_evaluate_lck(acpi_handle handle, int lock)
  * some old BIOSes do expect a buffer or an integer etc.
  */
 union acpi_object *
-acpi_evaluate_dsm(acpi_handle handle, const u8 *uuid, u64 rev, u64 func,
+acpi_evaluate_dsm(acpi_handle handle, const uuid_le *uuid, u64 rev, u64 func,
 		  union acpi_object *argv4)
 {
 	acpi_status ret;
@@ -674,7 +674,7 @@ EXPORT_SYMBOL(acpi_evaluate_dsm);
  * functions. Currently only support 64 functions at maximum, should be
  * enough for now.
  */
-bool acpi_check_dsm(acpi_handle handle, const u8 *uuid, u64 rev, u64 funcs)
+bool acpi_check_dsm(acpi_handle handle, const uuid_le *uuid, u64 rev, u64 funcs)
 {
 	int i;
 	u64 mask = 0;
diff --git a/drivers/char/tpm/tpm_crb.c b/drivers/char/tpm/tpm_crb.c
index b917b9d5f710..f789f7e5a17d 100644
--- a/drivers/char/tpm/tpm_crb.c
+++ b/drivers/char/tpm/tpm_crb.c
@@ -27,10 +27,9 @@
 
 #define ACPI_SIG_TPM2 "TPM2"
 
-static const u8 CRB_ACPI_START_UUID[] = {
-	/* 0000 */ 0xAB, 0x6C, 0xBF, 0x6B, 0x63, 0x54, 0x14, 0x47,
-	/* 0008 */ 0xB7, 0xCD, 0xF0, 0x20, 0x3C, 0x03, 0x68, 0xD4
-};
+static const uuid_le crb_acpi_start_uuid =
+	UUID_LE(0x6BBF6CAB, 0x5463, 0x4714,
+		0xB7, 0xCD, 0xF0, 0x20, 0x3C, 0x03, 0x68, 0xD4);
 
 enum crb_defaults {
 	CRB_ACPI_START_REVISION_ID = 1,
@@ -266,7 +265,7 @@ static int crb_do_acpi_start(struct tpm_chip *chip)
 	int rc;
 
 	obj = acpi_evaluate_dsm(chip->acpi_dev_handle,
-				CRB_ACPI_START_UUID,
+				&crb_acpi_start_uuid,
 				CRB_ACPI_START_REVISION_ID,
 				CRB_ACPI_START_INDEX,
 				NULL);
diff --git a/drivers/char/tpm/tpm_ppi.c b/drivers/char/tpm/tpm_ppi.c
index 692a2c6ae036..7cf682426361 100644
--- a/drivers/char/tpm/tpm_ppi.c
+++ b/drivers/char/tpm/tpm_ppi.c
@@ -32,20 +32,16 @@
 #define PPI_VS_REQ_START	128
 #define PPI_VS_REQ_END		255
 
-static const u8 tpm_ppi_uuid[] = {
-	0xA6, 0xFA, 0xDD, 0x3D,
-	0x1B, 0x36,
-	0xB4, 0x4E,
-	0xA4, 0x24,
-	0x8D, 0x10, 0x08, 0x9D, 0x16, 0x53
-};
+static const uuid_le tpm_ppi_uuid =
+	UUID_LE(0x3DDDFAA6, 0x361B, 0x4EB4,
+		0xA4, 0x24, 0x8D, 0x10, 0x08, 0x9D, 0x16, 0x53);
 
 static inline union acpi_object *
 tpm_eval_dsm(acpi_handle ppi_handle, int func, acpi_object_type type,
 	     union acpi_object *argv4)
 {
 	BUG_ON(!ppi_handle);
-	return acpi_evaluate_dsm_typed(ppi_handle, tpm_ppi_uuid,
+	return acpi_evaluate_dsm_typed(ppi_handle, &tpm_ppi_uuid,
 				       TPM_PPI_REVISION_ID,
 				       func, argv4, type);
 }
@@ -107,7 +103,7 @@ static ssize_t tpm_store_ppi_request(struct device *dev,
 	 * is updated with function index from SUBREQ to SUBREQ2 since PPI
 	 * version 1.1
 	 */
-	if (acpi_check_dsm(chip->acpi_dev_handle, tpm_ppi_uuid,
+	if (acpi_check_dsm(chip->acpi_dev_handle, &tpm_ppi_uuid,
 			   TPM_PPI_REVISION_ID, 1 << TPM_PPI_FN_SUBREQ2))
 		func = TPM_PPI_FN_SUBREQ2;
 
@@ -268,7 +264,7 @@ static ssize_t show_ppi_operations(acpi_handle dev_handle, char *buf, u32 start,
 		"User not required",
 	};
 
-	if (!acpi_check_dsm(dev_handle, tpm_ppi_uuid, TPM_PPI_REVISION_ID,
+	if (!acpi_check_dsm(dev_handle, &tpm_ppi_uuid, TPM_PPI_REVISION_ID,
 			    1 << TPM_PPI_FN_GETOPR))
 		return -EPERM;
 
@@ -341,12 +337,12 @@ void tpm_add_ppi(struct tpm_chip *chip)
 	if (!chip->acpi_dev_handle)
 		return;
 
-	if (!acpi_check_dsm(chip->acpi_dev_handle, tpm_ppi_uuid,
+	if (!acpi_check_dsm(chip->acpi_dev_handle, &tpm_ppi_uuid,
 			    TPM_PPI_REVISION_ID, 1 << TPM_PPI_FN_VERSION))
 		return;
 
 	/* Cache PPI version string. */
-	obj = acpi_evaluate_dsm_typed(chip->acpi_dev_handle, tpm_ppi_uuid,
+	obj = acpi_evaluate_dsm_typed(chip->acpi_dev_handle, &tpm_ppi_uuid,
 				      TPM_PPI_REVISION_ID, TPM_PPI_FN_VERSION,
 				      NULL, ACPI_TYPE_STRING);
 	if (obj) {
diff --git a/drivers/gpu/drm/i915/intel_acpi.c b/drivers/gpu/drm/i915/intel_acpi.c
index eb638a1e69d2..72bfe6ceadf8 100644
--- a/drivers/gpu/drm/i915/intel_acpi.c
+++ b/drivers/gpu/drm/i915/intel_acpi.c
@@ -15,13 +15,9 @@ static struct intel_dsm_priv {
 	acpi_handle dhandle;
 } intel_dsm_priv;
 
-static const u8 intel_dsm_guid[] = {
-	0xd3, 0x73, 0xd8, 0x7e,
-	0xd0, 0xc2,
-	0x4f, 0x4e,
-	0xa8, 0x54,
-	0x0f, 0x13, 0x17, 0xb0, 0x1c, 0x2c
-};
+static const uuid_le intel_dsm_guid =
+	UUID_LE(0x7ed873d3, 0xc2d0, 0x4e4f,
+		0xa8, 0x54, 0x0f, 0x13, 0x17, 0xb0, 0x1c, 0x2c);
 
 static char *intel_dsm_port_name(u8 id)
 {
@@ -80,7 +76,7 @@ static void intel_dsm_platform_mux_info(void)
 	int i;
 	union acpi_object *pkg, *connector_count;
 
-	pkg = acpi_evaluate_dsm_typed(intel_dsm_priv.dhandle, intel_dsm_guid,
+	pkg = acpi_evaluate_dsm_typed(intel_dsm_priv.dhandle, &intel_dsm_guid,
 			INTEL_DSM_REVISION_ID, INTEL_DSM_FN_PLATFORM_MUX_INFO,
 			NULL, ACPI_TYPE_PACKAGE);
 	if (!pkg) {
@@ -118,7 +114,7 @@ static bool intel_dsm_pci_probe(struct pci_dev *pdev)
 	if (!dhandle)
 		return false;
 
-	if (!acpi_check_dsm(dhandle, intel_dsm_guid, INTEL_DSM_REVISION_ID,
+	if (!acpi_check_dsm(dhandle, &intel_dsm_guid, INTEL_DSM_REVISION_ID,
 			    1 << INTEL_DSM_FN_PLATFORM_MUX_INFO)) {
 		DRM_DEBUG_KMS("no _DSM method for intel device\n");
 		return false;
diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.c b/drivers/gpu/drm/nouveau/nouveau_acpi.c
index 39468c218027..faea23276d4a 100644
--- a/drivers/gpu/drm/nouveau/nouveau_acpi.c
+++ b/drivers/gpu/drm/nouveau/nouveau_acpi.c
@@ -60,15 +60,13 @@ bool nouveau_is_v1_dsm(void) {
 }
 
 #ifdef CONFIG_VGA_SWITCHEROO
-static const char nouveau_dsm_muid[] = {
-	0xA0, 0xA0, 0x95, 0x9D, 0x60, 0x00, 0x48, 0x4D,
-	0xB3, 0x4D, 0x7E, 0x5F, 0xEA, 0x12, 0x9F, 0xD4,
-};
+static const uuid_le nouveau_dsm_muid =
+	UUID_LE(0x9D95A0A0, 0x0060, 0x4D48,
+		0xB3, 0x4D, 0x7E, 0x5F, 0xEA, 0x12, 0x9F, 0xD4);
 
-static const char nouveau_op_dsm_muid[] = {
-	0xF8, 0xD8, 0x86, 0xA4, 0xDA, 0x0B, 0x1B, 0x47,
-	0xA7, 0x2B, 0x60, 0x42, 0xA6, 0xB5, 0xBE, 0xE0,
-};
+static const uuid_le nouveau_op_dsm_muid =
+	UUID_LE(0xA486D8F8, 0x0BDA, 0x471B,
+		0xA7, 0x2B, 0x60, 0x42, 0xA6, 0xB5, 0xBE, 0xE0);
 
 static int nouveau_optimus_dsm(acpi_handle handle, int func, int arg, uint32_t *result)
 {
@@ -86,7 +84,7 @@ static int nouveau_optimus_dsm(acpi_handle handle, int func, int arg, uint32_t *
 		args_buff[i] = (arg >> i * 8) & 0xFF;
 
 	*result = 0;
-	obj = acpi_evaluate_dsm_typed(handle, nouveau_op_dsm_muid, 0x00000100,
+	obj = acpi_evaluate_dsm_typed(handle, &nouveau_op_dsm_muid, 0x00000100,
 				      func, &argv4, ACPI_TYPE_BUFFER);
 	if (!obj) {
 		acpi_handle_info(handle, "failed to evaluate _DSM\n");
@@ -138,7 +136,7 @@ static int nouveau_dsm(acpi_handle handle, int func, int arg)
 		.integer.value = arg,
 	};
 
-	obj = acpi_evaluate_dsm_typed(handle, nouveau_dsm_muid, 0x00000102,
+	obj = acpi_evaluate_dsm_typed(handle, &nouveau_dsm_muid, 0x00000102,
 				      func, &argv4, ACPI_TYPE_INTEGER);
 	if (!obj) {
 		acpi_handle_info(handle, "failed to evaluate _DSM\n");
@@ -259,7 +257,7 @@ static void nouveau_dsm_pci_probe(struct pci_dev *pdev, acpi_handle *dhandle_out
 	if (!acpi_has_method(dhandle, "_DSM"))
 		return;
 
-	supports_mux = acpi_check_dsm(dhandle, nouveau_dsm_muid, 0x00000102,
+	supports_mux = acpi_check_dsm(dhandle, &nouveau_dsm_muid, 0x00000102,
 				      1 << NOUVEAU_DSM_POWER);
 	optimus_funcs = nouveau_dsm_get_optimus_functions(dhandle);
 
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/mxm/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/mxm/base.c
index e3e2f5e83815..cc95b8150a86 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/mxm/base.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mxm/base.c
@@ -81,10 +81,9 @@ mxm_shadow_dsm(struct nvkm_mxm *mxm, u8 version)
 {
 	struct nvkm_subdev *subdev = &mxm->subdev;
 	struct nvkm_device *device = subdev->device;
-	static char muid[] = {
-		0x00, 0xA4, 0x04, 0x40, 0x7D, 0x91, 0xF2, 0x4C,
-		0xB8, 0x9C, 0x79, 0xB6, 0x2F, 0xD5, 0x56, 0x65
-	};
+	static uuid_le muid =
+		UUID_LE(0x4004A400, 0x917D, 0x4CF2,
+			0xB8, 0x9C, 0x79, 0xB6, 0x2F, 0xD5, 0x56, 0x65);
 	u32 mxms_args[] = { 0x00000000 };
 	union acpi_object argv4 = {
 		.buffer.type = ACPI_TYPE_BUFFER,
@@ -105,7 +104,7 @@ mxm_shadow_dsm(struct nvkm_mxm *mxm, u8 version)
 	 * unless you pass in exactly the version it supports..
 	 */
 	rev = (version & 0xf0) << 4 | (version & 0x0f);
-	obj = acpi_evaluate_dsm(handle, muid, rev, 0x00000010, &argv4);
+	obj = acpi_evaluate_dsm(handle, &muid, rev, 0x00000010, &argv4);
 	if (!obj) {
 		nvkm_debug(subdev, "DSM MXMS failed\n");
 		return false;
diff --git a/drivers/hid/i2c-hid/i2c-hid.c b/drivers/hid/i2c-hid/i2c-hid.c
index 8daa8ce64ebb..f83bd717cdd5 100644
--- a/drivers/hid/i2c-hid/i2c-hid.c
+++ b/drivers/hid/i2c-hid/i2c-hid.c
@@ -872,10 +872,9 @@ static int i2c_hid_fetch_hid_descriptor(struct i2c_hid *ihid)
 static int i2c_hid_acpi_pdata(struct i2c_client *client,
 		struct i2c_hid_platform_data *pdata)
 {
-	static u8 i2c_hid_guid[] = {
-		0xF7, 0xF6, 0xDF, 0x3C, 0x67, 0x42, 0x55, 0x45,
-		0xAD, 0x05, 0xB3, 0x0A, 0x3D, 0x89, 0x38, 0xDE,
-	};
+	static uuid_le i2c_hid_guid =
+		UUID_LE(0x3CDFF6F7, 0x4267, 0x4555,
+			0xAD, 0x05, 0xB3, 0x0A, 0x3D, 0x89, 0x38, 0xDE);
 	union acpi_object *obj;
 	struct acpi_device *adev;
 	acpi_handle handle;
@@ -884,7 +883,7 @@ static int i2c_hid_acpi_pdata(struct i2c_client *client,
 	if (!handle || acpi_bus_get_device(handle, &adev))
 		return -ENODEV;
 
-	obj = acpi_evaluate_dsm_typed(handle, i2c_hid_guid, 1, 1, NULL,
+	obj = acpi_evaluate_dsm_typed(handle, &i2c_hid_guid, 1, 1, NULL,
 				      ACPI_TYPE_INTEGER);
 	if (!obj) {
 		dev_err(&client->dev, "device _DSM execution failed\n");
diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
index cbf7763d8091..420d51b286ad 100644
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -1808,10 +1808,9 @@ IOMMU_INIT_POST(detect_intel_iommu);
  * for Directed-IO Architecture Specifiction, Rev 2.2, Section 8.8
  * "Remapping Hardware Unit Hot Plug".
  */
-static u8 dmar_hp_uuid[] = {
-	/* 0000 */    0xA6, 0xA3, 0xC1, 0xD8, 0x9B, 0xBE, 0x9B, 0x4C,
-	/* 0008 */    0x91, 0xBF, 0xC3, 0xCB, 0x81, 0xFC, 0x5D, 0xAF
-};
+static uuid_le dmar_hp_uuid =
+	UUID_LE(0xD8C1A3A6, 0xBE9B, 0x4C9B,
+		0x91, 0xBF, 0xC3, 0xCB, 0x81, 0xFC, 0x5D, 0xAF);
 
 /*
  * Currently there's only one revision and BIOS will not check the revision id,
@@ -1824,7 +1823,7 @@ static u8 dmar_hp_uuid[] = {
 
 static inline bool dmar_detect_dsm(acpi_handle handle, int func)
 {
-	return acpi_check_dsm(handle, dmar_hp_uuid, DMAR_DSM_REV_ID, 1 << func);
+	return acpi_check_dsm(handle, &dmar_hp_uuid, DMAR_DSM_REV_ID, 1 << func);
 }
 
 static int dmar_walk_dsm_resource(acpi_handle handle, int func,
@@ -1843,7 +1842,7 @@ static int dmar_walk_dsm_resource(acpi_handle handle, int func,
 	if (!dmar_detect_dsm(handle, func))
 		return 0;
 
-	obj = acpi_evaluate_dsm_typed(handle, dmar_hp_uuid, DMAR_DSM_REV_ID,
+	obj = acpi_evaluate_dsm_typed(handle, &dmar_hp_uuid, DMAR_DSM_REV_ID,
 				      func, NULL, ACPI_TYPE_BUFFER);
 	if (!obj)
 		return -ENODEV;
diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c
index 92fc3f7c538d..262b8c320d7c 100644
--- a/drivers/mmc/host/sdhci-pci-core.c
+++ b/drivers/mmc/host/sdhci-pci-core.c
@@ -404,10 +404,9 @@ struct intel_host {
 	bool	d3_retune;
 };
 
-const u8 intel_dsm_uuid[] = {
-	0xA5, 0x3E, 0xC1, 0xF6, 0xCD, 0x65, 0x1F, 0x46,
-	0xAB, 0x7A, 0x29, 0xF7, 0xE8, 0xD5, 0xBD, 0x61,
-};
+const uuid_le intel_dsm_uuid =
+	UUID_LE(0xF6C13EA5, 0x65CD, 0x461F,
+		0xAB, 0x7A, 0x29, 0xF7, 0xE8, 0xD5, 0xBD, 0x61);
 
 static int __intel_dsm(struct intel_host *intel_host, struct device *dev,
 		       unsigned int fn, u32 *result)
@@ -416,7 +415,7 @@ static int __intel_dsm(struct intel_host *intel_host, struct device *dev,
 	int err = 0;
 	size_t len;
 
-	obj = acpi_evaluate_dsm(ACPI_HANDLE(dev), intel_dsm_uuid, 0, fn, NULL);
+	obj = acpi_evaluate_dsm(ACPI_HANDLE(dev), &intel_dsm_uuid, 0, fn, NULL);
 	if (!obj)
 		return -EOPNOTSUPP;
 
diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c
index e13aa064a8e9..02842fe7f1d0 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c
@@ -29,10 +29,9 @@ enum _dsm_rst_type {
 	HNS_ROCE_RESET_FUNC     = 0x7,
 };
 
-const u8 hns_dsaf_acpi_dsm_uuid[] = {
-	0x1A, 0xAA, 0x85, 0x1A, 0x93, 0xE2, 0x5E, 0x41,
-	0x8E, 0x28, 0x8D, 0x69, 0x0A, 0x0F, 0x82, 0x0A
-};
+const uuid_le hns_dsaf_acpi_dsm_uuid =
+	UUID_LE(0x1A85AA1A, 0xE293, 0x415E,
+		0x8E, 0x28, 0x8D, 0x69, 0x0A, 0x0F, 0x82, 0x0A);
 
 static void dsaf_write_sub(struct dsaf_device *dsaf_dev, u32 reg, u32 val)
 {
@@ -151,7 +150,7 @@ static void hns_dsaf_acpi_srst_by_port(struct dsaf_device *dsaf_dev, u8 op_type,
 	argv4.package.elements = obj_args;
 
 	obj = acpi_evaluate_dsm(ACPI_HANDLE(dsaf_dev->dev),
-				hns_dsaf_acpi_dsm_uuid, 0, op_type, &argv4);
+				&hns_dsaf_acpi_dsm_uuid, 0, op_type, &argv4);
 	if (!obj) {
 		dev_warn(dsaf_dev->dev, "reset port_type%d port%d fail!",
 			 port_type, port);
@@ -434,7 +433,7 @@ static phy_interface_t hns_mac_get_phy_if_acpi(struct hns_mac_cb *mac_cb)
 	argv4.package.elements = &obj_args,
 
 	obj = acpi_evaluate_dsm(ACPI_HANDLE(mac_cb->dev),
-				hns_dsaf_acpi_dsm_uuid, 0,
+				&hns_dsaf_acpi_dsm_uuid, 0,
 				HNS_OP_GET_PORT_TYPE_FUNC, &argv4);
 
 	if (!obj || obj->type != ACPI_TYPE_INTEGER)
@@ -474,7 +473,7 @@ int hns_mac_get_sfp_prsnt_acpi(struct hns_mac_cb *mac_cb, int *sfp_prsnt)
 	argv4.package.elements = &obj_args,
 
 	obj = acpi_evaluate_dsm(ACPI_HANDLE(mac_cb->dev),
-				hns_dsaf_acpi_dsm_uuid, 0,
+				&hns_dsaf_acpi_dsm_uuid, 0,
 				HNS_OP_GET_SFP_STAT_FUNC, &argv4);
 
 	if (!obj || obj->type != ACPI_TYPE_INTEGER)
@@ -565,7 +564,7 @@ hns_mac_config_sds_loopback_acpi(struct hns_mac_cb *mac_cb, bool en)
 	argv4.package.elements = obj_args;
 
 	obj = acpi_evaluate_dsm(ACPI_HANDLE(mac_cb->dsaf_dev->dev),
-				hns_dsaf_acpi_dsm_uuid, 0,
+				&hns_dsaf_acpi_dsm_uuid, 0,
 				HNS_OP_SERDES_LP_FUNC, &argv4);
 	if (!obj) {
 		dev_warn(mac_cb->dsaf_dev->dev, "set port%d serdes lp fail!",
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index 001860361434..eb612123e0dd 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -24,10 +24,9 @@
  * The UUID is defined in the PCI Firmware Specification available here:
  * https://www.pcisig.com/members/downloads/pcifw_r3_1_13Dec10.pdf
  */
-const u8 pci_acpi_dsm_uuid[] = {
-	0xd0, 0x37, 0xc9, 0xe5, 0x53, 0x35, 0x7a, 0x4d,
-	0x91, 0x17, 0xea, 0x4d, 0x19, 0xc3, 0x43, 0x4d
-};
+const uuid_le pci_acpi_dsm_uuid =
+	UUID_LE(0xe5c937d0, 0x3553, 0x4d7a,
+		0x91, 0x17, 0xea, 0x4d, 0x19, 0xc3, 0x43, 0x4d);
 
 #if defined(CONFIG_PCI_QUIRKS) && defined(CONFIG_ARM64)
 static int acpi_get_rc_addr(struct acpi_device *adev, struct resource *res)
@@ -680,7 +679,7 @@ void acpi_pci_add_bus(struct pci_bus *bus)
 	if (!pci_is_root_bus(bus))
 		return;
 
-	obj = acpi_evaluate_dsm(ACPI_HANDLE(bus->bridge), pci_acpi_dsm_uuid, 3,
+	obj = acpi_evaluate_dsm(ACPI_HANDLE(bus->bridge), &pci_acpi_dsm_uuid, 3,
 				RESET_DELAY_DSM, NULL);
 	if (!obj)
 		return;
@@ -745,7 +744,7 @@ static void pci_acpi_optimize_delay(struct pci_dev *pdev,
 	if (bridge->ignore_reset_delay)
 		pdev->d3cold_delay = 0;
 
-	obj = acpi_evaluate_dsm(handle, pci_acpi_dsm_uuid, 3,
+	obj = acpi_evaluate_dsm(handle, &pci_acpi_dsm_uuid, 3,
 				FUNCTION_DELAY_DSM, NULL);
 	if (!obj)
 		return;
diff --git a/drivers/pci/pci-label.c b/drivers/pci/pci-label.c
index 51357377efbc..a2c04229f1dc 100644
--- a/drivers/pci/pci-label.c
+++ b/drivers/pci/pci-label.c
@@ -172,7 +172,7 @@ static int dsm_get_label(struct device *dev, char *buf,
 	if (!handle)
 		return -1;
 
-	obj = acpi_evaluate_dsm(handle, pci_acpi_dsm_uuid, 0x2,
+	obj = acpi_evaluate_dsm(handle, &pci_acpi_dsm_uuid, 0x2,
 				DEVICE_LABEL_DSM, NULL);
 	if (!obj)
 		return -1;
@@ -212,7 +212,7 @@ static bool device_has_dsm(struct device *dev)
 	if (!handle)
 		return false;
 
-	return !!acpi_check_dsm(handle, pci_acpi_dsm_uuid, 0x2,
+	return !!acpi_check_dsm(handle, &pci_acpi_dsm_uuid, 0x2,
 				1 << DEVICE_LABEL_DSM);
 }
 
diff --git a/drivers/thermal/int340x_thermal/int3400_thermal.c b/drivers/thermal/int340x_thermal/int3400_thermal.c
index 9413c4abf0b9..c0eb3bb19b23 100644
--- a/drivers/thermal/int340x_thermal/int3400_thermal.c
+++ b/drivers/thermal/int340x_thermal/int3400_thermal.c
@@ -23,7 +23,7 @@ enum int3400_thermal_uuid {
 	INT3400_THERMAL_MAXIMUM_UUID,
 };
 
-static u8 *int3400_thermal_uuids[INT3400_THERMAL_MAXIMUM_UUID] = {
+static const char *int3400_thermal_uuids[INT3400_THERMAL_MAXIMUM_UUID] = {
 	"42A441D6-AE6A-462b-A84B-4A8CE79027D3",
 	"3A95C389-E4B8-4629-A526-C52C88626BAE",
 	"97C68AE7-15FA-499c-B8C9-5DA81D606E0A",
@@ -141,10 +141,10 @@ static int int3400_thermal_get_uuids(struct int3400_thermal_priv *priv)
 		}
 
 		for (j = 0; j < INT3400_THERMAL_MAXIMUM_UUID; j++) {
-			u8 uuid[16];
+			uuid_le u;
 
-			acpi_str_to_uuid(int3400_thermal_uuids[j], uuid);
-			if (!strncmp(uuid, objb->buffer.pointer, 16)) {
+			uuid_le_to_bin(int3400_thermal_uuids[j], &u);
+			if (!uuid_le_cmp(*(uuid_le *)objb->buffer.pointer), u) {
 				priv->uuid_bitmap |= (1 << j);
 				break;
 			}
diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c
index a15ec71d0423..6b5284ec76df 100644
--- a/drivers/usb/dwc3/dwc3-pci.c
+++ b/drivers/usb/dwc3/dwc3-pci.c
@@ -56,7 +56,7 @@ struct dwc3_pci {
 	struct platform_device *dwc3;
 	struct pci_dev *pci;
 
-	u8 uuid[16];
+	uuid_le uuid;
 
 	unsigned int has_dsm_for_pm:1;
 };
@@ -118,7 +118,7 @@ static int dwc3_pci_quirks(struct dwc3_pci *dwc)
 
 		if (pdev->device == PCI_DEVICE_ID_INTEL_BXT ||
 				pdev->device == PCI_DEVICE_ID_INTEL_BXT_M) {
-			acpi_str_to_uuid(PCI_INTEL_BXT_DSM_UUID, dwc->uuid);
+			uuid_le_to_bin(PCI_INTEL_BXT_DSM_UUID, &dwc->uuid);
 			dwc->has_dsm_for_pm = true;
 		}
 
@@ -288,7 +288,7 @@ static int dwc3_pci_dsm(struct dwc3_pci *dwc, int param)
 	tmp.type = ACPI_TYPE_INTEGER;
 	tmp.integer.value = param;
 
-	obj = acpi_evaluate_dsm(ACPI_HANDLE(&dwc->pci->dev), dwc->uuid,
+	obj = acpi_evaluate_dsm(ACPI_HANDLE(&dwc->pci->dev), &dwc->uuid,
 			1, PCI_INTEL_BXT_FUNC_PMU_PWR, &argv4);
 	if (!obj) {
 		dev_err(&dwc->pci->dev, "failed to evaluate _DSM\n");
diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index 7b86508ac8cf..93b4f0de9418 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -210,13 +210,12 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
 #ifdef CONFIG_ACPI
 static void xhci_pme_acpi_rtd3_enable(struct pci_dev *dev)
 {
-	static const u8 intel_dsm_uuid[] = {
-		0xb7, 0x0c, 0x34, 0xac,	0x01, 0xe9, 0xbf, 0x45,
-		0xb7, 0xe6, 0x2b, 0x34, 0xec, 0x93, 0x1e, 0x23,
-	};
+	static const uuid_le intel_dsm_uuid =
+		UUID_LE(0xac340cb7, 0xe901, 0x45bf,
+			0xb7, 0xe6, 0x2b, 0x34, 0xec, 0x93, 0x1e, 0x23);
 	union acpi_object *obj;
 
-	obj = acpi_evaluate_dsm(ACPI_HANDLE(&dev->dev), intel_dsm_uuid, 3, 1,
+	obj = acpi_evaluate_dsm(ACPI_HANDLE(&dev->dev), &intel_dsm_uuid, 3, 1,
 				NULL);
 	ACPI_FREE(obj);
 }
diff --git a/drivers/usb/misc/ucsi.c b/drivers/usb/misc/ucsi.c
index 07397bddefa3..49e32ffbe59f 100644
--- a/drivers/usb/misc/ucsi.c
+++ b/drivers/usb/misc/ucsi.c
@@ -61,7 +61,7 @@ static int ucsi_acpi_cmd(struct ucsi *ucsi, struct ucsi_control *ctrl)
 
 	ucsi->data->ctrl.raw_cmd = ctrl->raw_cmd;
 
-	obj = acpi_evaluate_dsm(ACPI_HANDLE(ucsi->dev), uuid.b, 1, 1, NULL);
+	obj = acpi_evaluate_dsm(ACPI_HANDLE(ucsi->dev), &uuid, 1, 1, NULL);
 	if (!obj) {
 		dev_err(ucsi->dev, "%s: failed to evaluate _DSM\n", __func__);
 		return -EIO;
diff --git a/drivers/usb/typec/typec_wcove.c b/drivers/usb/typec/typec_wcove.c
index d5a7b21fa3f1..5ce93e0a15ca 100644
--- a/drivers/usb/typec/typec_wcove.c
+++ b/drivers/usb/typec/typec_wcove.c
@@ -118,7 +118,7 @@ static int wcove_typec_func(struct wcove_typec *wcove,
 	tmp.type = ACPI_TYPE_INTEGER;
 	tmp.integer.value = param;
 
-	obj = acpi_evaluate_dsm(ACPI_HANDLE(wcove->dev), uuid.b, 1, func,
+	obj = acpi_evaluate_dsm(ACPI_HANDLE(wcove->dev), &uuid, 1, func,
 				&argv4);
 	if (!obj) {
 		dev_err(wcove->dev, "%s: failed to evaluate _DSM\n", __func__);
@@ -314,7 +314,7 @@ static int wcove_typec_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	if (!acpi_check_dsm(ACPI_HANDLE(&pdev->dev), uuid.b, 0, 0x1f)) {
+	if (!acpi_check_dsm(ACPI_HANDLE(&pdev->dev), &uuid, 0, 0x1f)) {
 		dev_err(&pdev->dev, "Missing _DSM functions\n");
 		return -ENODEV;
 	}
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 197f3fffc9a7..0682942d6a76 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -61,13 +61,14 @@ bool acpi_ata_match(acpi_handle handle);
 bool acpi_bay_match(acpi_handle handle);
 bool acpi_dock_match(acpi_handle handle);
 
-bool acpi_check_dsm(acpi_handle handle, const u8 *uuid, u64 rev, u64 funcs);
-union acpi_object *acpi_evaluate_dsm(acpi_handle handle, const u8 *uuid,
+bool acpi_check_dsm(acpi_handle handle, const uuid_le *uuid, u64 rev, u64 funcs);
+union acpi_object *acpi_evaluate_dsm(acpi_handle handle, const uuid_le *uuid,
 			u64 rev, u64 func, union acpi_object *argv4);
 
 static inline union acpi_object *
-acpi_evaluate_dsm_typed(acpi_handle handle, const u8 *uuid, u64 rev, u64 func,
-			union acpi_object *argv4, acpi_object_type type)
+acpi_evaluate_dsm_typed(acpi_handle handle, const uuid_le *uuid, u64 rev,
+			u64 func, union acpi_object *argv4,
+			acpi_object_type type)
 {
 	union acpi_object *obj;
 
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 137e4a3d89c5..66d135003780 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -39,6 +39,7 @@
 #include <linux/dynamic_debug.h>
 #include <linux/module.h>
 #include <linux/mutex.h>
+#include <linux/uuid.h>
 
 #include <acpi/acpi_bus.h>
 #include <acpi/acpi_drivers.h>
@@ -457,7 +458,6 @@ struct acpi_osc_context {
 	struct acpi_buffer ret;		/* free by caller if success */
 };
 
-acpi_status acpi_str_to_uuid(char *str, u8 *uuid);
 acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context);
 
 /* Indexes into _OSC Capabilities Buffer (DWORDs 2 & 3 are device-specific) */
@@ -741,7 +741,7 @@ static inline bool acpi_driver_match_device(struct device *dev,
 }
 
 static inline union acpi_object *acpi_evaluate_dsm(acpi_handle handle,
-						   const u8 *uuid,
+						   const uuid_le *uuid,
 						   int rev, int func,
 						   union acpi_object *argv4)
 {
diff --git a/include/linux/pci-acpi.h b/include/linux/pci-acpi.h
index 7a4e83a8c89c..917a6ad0f24d 100644
--- a/include/linux/pci-acpi.h
+++ b/include/linux/pci-acpi.h
@@ -105,7 +105,7 @@ static inline void acpiphp_remove_slots(struct pci_bus *bus) { }
 static inline void acpiphp_check_host_bridge(struct acpi_device *adev) { }
 #endif
 
-extern const u8 pci_acpi_dsm_uuid[];
+extern const uuid_le pci_acpi_dsm_uuid;
 #define DEVICE_LABEL_DSM	0x07
 #define RESET_DELAY_DSM		0x08
 #define FUNCTION_DELAY_DSM	0x09
diff --git a/sound/soc/intel/skylake/skl-nhlt.c b/sound/soc/intel/skylake/skl-nhlt.c
index e3f06672fd6d..b95f659dced5 100644
--- a/sound/soc/intel/skylake/skl-nhlt.c
+++ b/sound/soc/intel/skylake/skl-nhlt.c
@@ -21,8 +21,9 @@
 #include "skl.h"
 
 /* Unique identification for getting NHLT blobs */
-static u8 OSC_UUID[16] = {0x6E, 0x88, 0x9F, 0xA6, 0xEB, 0x6C, 0x94, 0x45,
-				0xA4, 0x1F, 0x7B, 0x5D, 0xCE, 0x24, 0xC5, 0x53};
+static uuid_le osc_uuid =
+	UUID_LE(0xA69F886E, 0x6CEB, 0x4594,
+		0xA4, 0x1F, 0x7B, 0x5D, 0xCE, 0x24, 0xC5, 0x53);
 
 struct nhlt_acpi_table *skl_nhlt_init(struct device *dev)
 {
@@ -37,7 +38,7 @@ struct nhlt_acpi_table *skl_nhlt_init(struct device *dev)
 		return NULL;
 	}
 
-	obj = acpi_evaluate_dsm(handle, OSC_UUID, 1, 1, NULL);
+	obj = acpi_evaluate_dsm(handle, &osc_uuid, 1, 1, NULL);
 	if (obj && obj->type == ACPI_TYPE_BUFFER) {
 		nhlt_ptr = (struct nhlt_resource_desc  *)obj->buffer.pointer;
 		nhlt_table = (struct nhlt_acpi_table *)
diff --git a/tools/testing/nvdimm/test/iomap.c b/tools/testing/nvdimm/test/iomap.c
index 64cae1a5deff..f190f22c53dd 100644
--- a/tools/testing/nvdimm/test/iomap.c
+++ b/tools/testing/nvdimm/test/iomap.c
@@ -370,7 +370,7 @@ acpi_status __wrap_acpi_evaluate_object(acpi_handle handle, acpi_string path,
 }
 EXPORT_SYMBOL(__wrap_acpi_evaluate_object);
 
-union acpi_object * __wrap_acpi_evaluate_dsm(acpi_handle handle, const u8 *uuid,
+union acpi_object * __wrap_acpi_evaluate_dsm(acpi_handle handle, const uuid_le *uuid,
 		u64 rev, u64 func, union acpi_object *argv4)
 {
 	union acpi_object *obj = ERR_PTR(-ENXIO);
diff --git a/tools/testing/nvdimm/test/nfit.c b/tools/testing/nvdimm/test/nfit.c
index c2187178fb13..145f6ee0234f 100644
--- a/tools/testing/nvdimm/test/nfit.c
+++ b/tools/testing/nvdimm/test/nfit.c
@@ -1559,7 +1559,7 @@ static unsigned long nfit_ctl_handle;
 union acpi_object *result;
 
 static union acpi_object *nfit_test_evaluate_dsm(acpi_handle handle,
-		const u8 *uuid, u64 rev, u64 func, union acpi_object *argv4)
+		const uuid_le *uuid, u64 rev, u64 func, union acpi_object *argv4)
 {
 	if (handle != &nfit_ctl_handle)
 		return ERR_PTR(-ENXIO);
-- 
2.11.0

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