[v1,1/1] treewide: Align match_string() with sysfs_match_string()

diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c
index bd4813bad317..f479cc62674a 100644
--- a/arch/powerpc/xmon/xmon.c
+++ b/arch/powerpc/xmon/xmon.c
@@ -3478,8 +3478,7 @@  skipbl(void)
 	return c;
 }
 
-#define N_PTREGS	44
-static const char *regnames[N_PTREGS] = {
+static const char *regnames[] = {
 	"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
 	"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
 	"r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
@@ -3514,7 +3513,7 @@  scanhex(unsigned long *vp)
 			regname[i] = c;
 		}
 		regname[i] = 0;
-		i = match_string(regnames, N_PTREGS, regname);
+		i = match_string(regnames, regname);
 		if (i < 0) {
 			printf("invalid register name '%%%s'\n", regname);
 			return 0;
diff --git a/arch/x86/kernel/cpu/mtrr/if.c b/arch/x86/kernel/cpu/mtrr/if.c
index a5c506f6da7f..9b749b848123 100644
--- a/arch/x86/kernel/cpu/mtrr/if.c
+++ b/arch/x86/kernel/cpu/mtrr/if.c
@@ -4,8 +4,8 @@ 
 #include <linux/uaccess.h>
 #include <linux/proc_fs.h>
 #include <linux/ctype.h>
-#include <linux/string.h>
 #include <linux/slab.h>
+#include <linux/string_helpers.h>
 #include <linux/init.h>
 
 #define LINE_SIZE 80
@@ -139,7 +139,7 @@  mtrr_write(struct file *file, const char __user *buf, size_t len, loff_t * ppos)
 		return -EINVAL;
 	ptr = skip_spaces(ptr + 5);
 
-	i = match_string(mtrr_strings, MTRR_NUM_TYPES, ptr);
+	i = match_string(mtrr_strings, ptr);
 	if (i < 0)
 		return i;
 
diff --git a/crypto/asymmetric_keys/pkcs7_verify.c b/crypto/asymmetric_keys/pkcs7_verify.c
index f0d4ff3c20a8..1139d9d1c89a 100644
--- a/crypto/asymmetric_keys/pkcs7_verify.c
+++ b/crypto/asymmetric_keys/pkcs7_verify.c
@@ -141,8 +141,8 @@  int pkcs7_get_digest(struct pkcs7_message *pkcs7, const u8 **buf, u32 *len,
 	*buf = sinfo->sig->digest;
 	*len = sinfo->sig->digest_size;
 
-	i = match_string(hash_algo_name, HASH_ALGO__LAST,
-			 sinfo->sig->hash_algo);
+	i = __match_string(hash_algo_name, HASH_ALGO__LAST,
+			   sinfo->sig->hash_algo);
 	if (i >= 0)
 		*hash_algo = i;
 
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 503773707e01..9cb350de30f0 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -798,7 +798,7 @@  static bool acpi_info_matches_ids(struct acpi_device_info *info,
 	if (!(info->valid & ACPI_VALID_HID))
 		return false;
 
-	index = match_string(ids, -1, info->hardware_id.string);
+	index = __match_string(ids, -1, info->hardware_id.string);
 	if (index >= 0)
 		return true;
 
@@ -809,7 +809,7 @@  static bool acpi_info_matches_ids(struct acpi_device_info *info,
 		return false;
 
 	for (i = 0; i < cid_list->count; i++) {
-		index = match_string(ids, -1, cid_list->ids[i].string);
+		index = __match_string(ids, -1, cid_list->ids[i].string);
 		if (index >= 0)
 			return true;
 	}
diff --git a/drivers/ata/pata_hpt366.c b/drivers/ata/pata_hpt366.c
index bdccd1ba1524..8134f9290791 100644
--- a/drivers/ata/pata_hpt366.c
+++ b/drivers/ata/pata_hpt366.c
@@ -178,7 +178,7 @@  static int hpt_dma_blacklisted(const struct ata_device *dev, char *modestr,
 
 	ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
 
-	i = match_string(list, -1, model_num);
+	i = __match_string(list, -1, model_num);
 	if (i >= 0) {
 		ata_dev_warn(dev, "%s is not supported for %s\n", modestr, list[i]);
 		return 1;
diff --git a/drivers/ata/pata_hpt37x.c b/drivers/ata/pata_hpt37x.c
index c0329cf01135..2d0b659bbd65 100644
--- a/drivers/ata/pata_hpt37x.c
+++ b/drivers/ata/pata_hpt37x.c
@@ -226,7 +226,7 @@  static int hpt_dma_blacklisted(const struct ata_device *dev, char *modestr,
 
 	ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
 
-	i = match_string(list, -1, model_num);
+	i = __match_string(list, -1, model_num);
 	if (i >= 0) {
 		ata_dev_warn(dev, "%s is not supported for %s\n",
 			     modestr, list[i]);
diff --git a/drivers/base/property.c b/drivers/base/property.c
index 837d77e3af2b..075c9dbd7aa5 100644
--- a/drivers/base/property.c
+++ b/drivers/base/property.c
@@ -15,7 +15,7 @@ 
 #include <linux/property.h>
 #include <linux/phy.h>
 #include <linux/slab.h>
-#include <linux/string.h>
+#include <linux/string_helpers.h>
 #include <linux/types.h>
 
 struct fwnode_handle *__dev_fwnode(struct device *dev)
@@ -489,7 +489,7 @@  int fwnode_property_match_string(const struct fwnode_handle *fwnode,
 	if (ret < 0)
 		goto out_free;
 
-	ret = match_string(values, nval, string);
+	ret = __match_string(values, nval, string);
 	if (ret < 0)
 		ret = -ENODATA;
 
@@ -526,7 +526,7 @@  int fwnode_property_match_property_string(const struct fwnode_handle *fwnode,
 	if (ret)
 		return ret;
 
-	ret = match_string(array, n, string);
+	ret = __match_string(array, n, string);
 	if (ret < 0)
 		ret = -ENOENT;
 
diff --git a/drivers/char/ipmi/ipmi_msghandler.c b/drivers/char/ipmi/ipmi_msghandler.c
index e12b531f5c2f..c7526eb1e963 100644
--- a/drivers/char/ipmi/ipmi_msghandler.c
+++ b/drivers/char/ipmi/ipmi_msghandler.c
@@ -78,7 +78,7 @@  static int panic_op_write_handler(const char *val,
 	int e;
 
 	strscpy(valcp, val, sizeof(valcp));
-	e = match_string(ipmi_panic_event_str, -1, strstrip(valcp));
+	e = __match_string(ipmi_panic_event_str, -1, strstrip(valcp));
 	if (e < 0)
 		return e;
 
diff --git a/drivers/char/ipmi/ipmi_si_hardcode.c b/drivers/char/ipmi/ipmi_si_hardcode.c
index 0c92fa3eee88..4d3275374a53 100644
--- a/drivers/char/ipmi/ipmi_si_hardcode.c
+++ b/drivers/char/ipmi/ipmi_si_hardcode.c
@@ -70,7 +70,7 @@  static void __init ipmi_hardcode_init_one(const char *si_type_str,
 	if (!si_type_str || !*si_type_str) {
 		p.type = SI_KCS;
 	} else {
-		t = match_string(si_to_str, -1, si_type_str);
+		t = __match_string(si_to_str, -1, si_type_str);
 		if (t < 0) {
 			pr_warn("Interface type specified for interface %d, was invalid: %s\n",
 				i, si_type_str);
diff --git a/drivers/clk/bcm/clk-bcm2835.c b/drivers/clk/bcm/clk-bcm2835.c
index fb04734afc80..9446422d5fa8 100644
--- a/drivers/clk/bcm/clk-bcm2835.c
+++ b/drivers/clk/bcm/clk-bcm2835.c
@@ -1447,9 +1447,7 @@  static struct clk_hw *bcm2835_register_clock(struct bcm2835_cprman *cprman,
 	for (i = 0; i < clock_data->num_mux_parents; i++) {
 		parents[i] = clock_data->parents[i];
 
-		ret = match_string(cprman_parent_names,
-				   ARRAY_SIZE(cprman_parent_names),
-				   parents[i]);
+		ret = match_string(cprman_parent_names, parents[i]);
 		if (ret >= 0)
 			parents[i] = cprman->real_parent_names[ret];
 	}
diff --git a/drivers/clk/rockchip/clk.c b/drivers/clk/rockchip/clk.c
index 73d2cbdc716b..30414d081f46 100644
--- a/drivers/clk/rockchip/clk.c
+++ b/drivers/clk/rockchip/clk.c
@@ -266,8 +266,8 @@  static struct clk *rockchip_clk_register_frac_branch(
 		struct clk *mux_clk;
 		int ret;
 
-		frac->mux_frac_idx = match_string(child->parent_names,
-						  child->num_parents, name);
+		frac->mux_frac_idx = __match_string(child->parent_names,
+						    child->num_parents, name);
 		frac->mux_ops = &clk_mux_ops;
 		frac->clk_nb.notifier_call = rockchip_clk_frac_notifier_cb;
 
diff --git a/drivers/clk/tegra/clk-tegra124-emc.c b/drivers/clk/tegra/clk-tegra124-emc.c
index 2a6db0434281..a2709ed60ee7 100644
--- a/drivers/clk/tegra/clk-tegra124-emc.c
+++ b/drivers/clk/tegra/clk-tegra124-emc.c
@@ -20,7 +20,7 @@ 
 #include <linux/of_platform.h>
 #include <linux/platform_device.h>
 #include <linux/sort.h>
-#include <linux/string.h>
+#include <linux/string_helpers.h>
 
 #include <soc/tegra/fuse.h>
 
@@ -413,13 +413,12 @@  static int load_one_timing_from_dt(struct tegra_clk_emc *tegra,
 	}
 
 	timing->parent_index = 0xff;
-	i = match_string(emc_parent_clk_names, ARRAY_SIZE(emc_parent_clk_names),
-			 __clk_get_name(timing->parent));
+	i = match_string(emc_parent_clk_names, __clk_get_name(timing->parent));
 	if (i < 0) {
 		pr_err("timing %pOF: %s is not a valid parent\n",
 		       node, __clk_get_name(timing->parent));
 		clk_put(timing->parent);
-		return -EINVAL;
+		return i;
 	}
 
 	timing->parent_index = i;
diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
index 1b7e82a0ad2e..b6f52f44625f 100644
--- a/drivers/cpufreq/amd-pstate.c
+++ b/drivers/cpufreq/amd-pstate.c
@@ -1117,9 +1117,9 @@  static ssize_t store_energy_performance_preference(
 	if (ret != 1)
 		return -EINVAL;
 
-	ret = match_string(energy_perf_strings, -1, str_preference);
+	ret = __match_string(energy_perf_strings, -1, str_preference);
 	if (ret < 0)
-		return -EINVAL;
+		return ret;
 
 	mutex_lock(&amd_pstate_limits_lock);
 	ret = amd_pstate_set_energy_pref_index(cpudata, ret);
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index 4b986c044741..1c2ee10415a2 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -832,7 +832,7 @@  static ssize_t store_energy_performance_preference(
 	if (ret != 1)
 		return -EINVAL;
 
-	ret = match_string(energy_perf_strings, -1, str_preference);
+	ret = __match_string(energy_perf_strings, -1, str_preference);
 	if (ret < 0) {
 		if (!boot_cpu_has(X86_FEATURE_HWP_EPP))
 			return ret;
diff --git a/drivers/crypto/intel/qat/qat_common/adf_cfg_services.c b/drivers/crypto/intel/qat/qat_common/adf_cfg_services.c
index 268052294468..4b8c45e8b164 100644
--- a/drivers/crypto/intel/qat/qat_common/adf_cfg_services.c
+++ b/drivers/crypto/intel/qat/qat_common/adf_cfg_services.c
@@ -3,7 +3,7 @@ 
 
 #include <linux/export.h>
 #include <linux/pci.h>
-#include <linux/string.h>
+#include <linux/string_helpers.h>
 #include "adf_cfg.h"
 #include "adf_cfg_services.h"
 #include "adf_cfg_strings.h"
@@ -35,8 +35,7 @@  int adf_get_service_enabled(struct adf_accel_dev *accel_dev)
 		return ret;
 	}
 
-	ret = match_string(adf_cfg_services, ARRAY_SIZE(adf_cfg_services),
-			   services);
+	ret = match_string(adf_cfg_services, services);
 	if (ret < 0)
 		dev_err(&GET_DEV(accel_dev),
 			"Invalid value of " ADF_SERVICES_ENABLED " param: %s\n",
diff --git a/drivers/gpu/drm/drm_panel_orientation_quirks.c b/drivers/gpu/drm/drm_panel_orientation_quirks.c
index aa93129c3397..624743caac4c 100644
--- a/drivers/gpu/drm/drm_panel_orientation_quirks.c
+++ b/drivers/gpu/drm/drm_panel_orientation_quirks.c
@@ -481,7 +481,7 @@  int drm_get_panel_orientation_quirk(int width, int height)
 		if (!bios_date)
 			continue;
 
-		i = match_string(data->bios_dates, -1, bios_date);
+		i = __match_string(data->bios_dates, -1, bios_date);
 		if (i >= 0)
 			return data->orientation;
 	}
diff --git a/drivers/gpu/drm/i915/display/intel_pipe_crc.c b/drivers/gpu/drm/i915/display/intel_pipe_crc.c
index 5a468ed6e26c..f9e7c66fd538 100644
--- a/drivers/gpu/drm/i915/display/intel_pipe_crc.c
+++ b/drivers/gpu/drm/i915/display/intel_pipe_crc.c
@@ -426,7 +426,7 @@  display_crc_ctl_parse_source(const char *buf, enum intel_pipe_crc_source *s)
 		return 0;
 	}
 
-	i = match_string(pipe_crc_sources, ARRAY_SIZE(pipe_crc_sources), buf);
+	i = match_string(pipe_crc_sources, buf);
 	if (i < 0)
 		return i;
 
diff --git a/drivers/gpu/drm/nouveau/dispnv04/tvnv17.c b/drivers/gpu/drm/nouveau/dispnv04/tvnv17.c
index 670c9739e5e1..7fb9f5345654 100644
--- a/drivers/gpu/drm/nouveau/dispnv04/tvnv17.c
+++ b/drivers/gpu/drm/nouveau/dispnv04/tvnv17.c
@@ -645,8 +645,8 @@  static int nv17_tv_create_resources(struct drm_encoder *encoder,
 	int i;
 
 	if (nouveau_tv_norm) {
-		i = match_string(nv17_tv_norm_names, num_tv_norms,
-				 nouveau_tv_norm);
+		i = __match_string(nv17_tv_norm_names, num_tv_norms,
+				   nouveau_tv_norm);
 		if (i < 0)
 			NV_WARN(drm, "Invalid TV norm setting \"%s\"\n",
 				nouveau_tv_norm);
diff --git a/drivers/gpu/drm/nouveau/dispnv50/crc.c b/drivers/gpu/drm/nouveau/dispnv50/crc.c
index 5936b6b3b15d..ea35d283b2d2 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/crc.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/crc.c
@@ -38,7 +38,7 @@  static int nv50_crc_parse_source(const char *buf, enum nv50_crc_source *s)
 		return 0;
 	}
 
-	i = match_string(nv50_crc_sources, ARRAY_SIZE(nv50_crc_sources), buf);
+	i = match_string(nv50_crc_sources, buf);
 	if (i < 0)
 		return i;
 
diff --git a/drivers/hwmon/ltc4282.c b/drivers/hwmon/ltc4282.c
index 4f608a3790fb..3546f5a7e7bd 100644
--- a/drivers/hwmon/ltc4282.c
+++ b/drivers/hwmon/ltc4282.c
@@ -21,7 +21,7 @@ 
 #include <linux/mutex.h>
 #include <linux/regmap.h>
 #include <linux/property.h>
-#include <linux/string.h>
+#include <linux/string_helpers.h>
 #include <linux/units.h>
 #include <linux/util_macros.h>
 
@@ -1282,8 +1282,7 @@  static int ltc4282_gpio_setup(struct ltc4282_state *st, struct device *dev)
 
 	ret = device_property_read_string(dev, "adi,gpio1-mode", &func);
 	if (!ret) {
-		ret = match_string(ltc4282_gpio1_modes,
-				   ARRAY_SIZE(ltc4282_gpio1_modes), func);
+		ret = match_string(ltc4282_gpio1_modes, func);
 		if (ret < 0)
 			return dev_err_probe(dev, ret,
 					     "Invalid func(%s) for gpio1\n",
@@ -1298,8 +1297,7 @@  static int ltc4282_gpio_setup(struct ltc4282_state *st, struct device *dev)
 
 	ret = device_property_read_string(dev, "adi,gpio2-mode", &func);
 	if (!ret) {
-		ret = match_string(ltc4282_gpio2_modes,
-				   ARRAY_SIZE(ltc4282_gpio2_modes), func);
+		ret = match_string(ltc4282_gpio2_modes, func);
 		if (ret < 0)
 			return dev_err_probe(dev, ret,
 					     "Invalid func(%s) for gpio2\n",
@@ -1463,8 +1461,7 @@  static int ltc4282_setup(struct ltc4282_state *st, struct device *dev)
 	ret = device_property_read_string(dev, "adi,overvoltage-dividers",
 					  &divider);
 	if (!ret) {
-		int div = match_string(ltc4282_dividers,
-				       ARRAY_SIZE(ltc4282_dividers), divider);
+		int div = match_string(ltc4282_dividers, divider);
 		if (div < 0)
 			return dev_err_probe(dev, -EINVAL,
 					     "Invalid val(%s) for adi,overvoltage-divider\n",
@@ -1478,8 +1475,7 @@  static int ltc4282_setup(struct ltc4282_state *st, struct device *dev)
 	ret = device_property_read_string(dev, "adi,undervoltage-dividers",
 					  &divider);
 	if (!ret) {
-		int div = match_string(ltc4282_dividers,
-				       ARRAY_SIZE(ltc4282_dividers), divider);
+		int div = match_string(ltc4282_dividers, divider);
 		if (div < 0)
 			return dev_err_probe(dev, -EINVAL,
 					     "Invalid val(%s) for adi,undervoltage-divider\n",
diff --git a/drivers/hwmon/nct6775-platform.c b/drivers/hwmon/nct6775-platform.c
index 9aa4dcf4a6f3..eb7eef9d2a76 100644
--- a/drivers/hwmon/nct6775-platform.c
+++ b/drivers/hwmon/nct6775-platform.c
@@ -1514,13 +1514,11 @@  static int __init sensors_nct6775_platform_init(void)
 
 	if (board_name && board_vendor &&
 	    !strcmp(board_vendor, "ASUSTeK COMPUTER INC.")) {
-		err = match_string(asus_wmi_boards, ARRAY_SIZE(asus_wmi_boards),
-				   board_name);
+		err = match_string(asus_wmi_boards, board_name);
 		if (err >= 0)
 			access = nct6775_determine_access(ASUSWMI_DEVICE_UID);
 
-		err = match_string(asus_msi_boards, ARRAY_SIZE(asus_msi_boards),
-				   board_name);
+		err = match_string(asus_msi_boards, board_name);
 		if (err >= 0)
 			access = nct6775_determine_access(ASUSMSI_DEVICE_UID);
 	}
diff --git a/drivers/hwtracing/intel_th/msu.c b/drivers/hwtracing/intel_th/msu.c
index be63d5b8f193..b083f1360111 100644
--- a/drivers/hwtracing/intel_th/msu.c
+++ b/drivers/hwtracing/intel_th/msu.c
@@ -1901,7 +1901,7 @@  mode_store(struct device *dev, struct device_attribute *attr, const char *buf,
 	if (!mode)
 		return -ENOMEM;
 
-	i = match_string(msc_mode, ARRAY_SIZE(msc_mode), mode);
+	i = match_string(msc_mode, mode);
 	if (i >= 0) {
 		kfree(mode);
 		goto found;
diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
index d2d2a6dbe29f..0eccb636b2fe 100644
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -111,7 +111,7 @@ 
 #include <linux/io.h>
 #include <linux/dmi.h>
 #include <linux/slab.h>
-#include <linux/string.h>
+#include <linux/string_helpers.h>
 #include <linux/completion.h>
 #include <linux/err.h>
 #include <linux/platform_device.h>
@@ -1186,7 +1186,7 @@  static acpi_status check_acpi_smo88xx_device(acpi_handle obj_handle,
 	if (!hid)
 		goto smo88xx_not_found;
 
-	i = match_string(acpi_smo8800_ids, ARRAY_SIZE(acpi_smo8800_ids), hid);
+	i = match_string(acpi_smo8800_ids, hid);
 	if (i < 0)
 		goto smo88xx_not_found;
 
diff --git a/drivers/leds/leds-sun50i-a100.c b/drivers/leds/leds-sun50i-a100.c
index 119eff9471f0..4220f1f8a503 100644
--- a/drivers/leds/leds-sun50i-a100.c
+++ b/drivers/leds/leds-sun50i-a100.c
@@ -256,7 +256,7 @@  static int sun50i_a100_ledc_parse_format(struct device *dev,
 
 	device_property_read_string(dev, "allwinner,pixel-format", &format);
 
-	i = match_string(sun50i_a100_ledc_formats, ARRAY_SIZE(sun50i_a100_ledc_formats), format);
+	i = match_string(sun50i_a100_ledc_formats, format);
 	if (i < 0)
 		return dev_err_probe(dev, i, "Bad pixel format '%s'\n", format);
 
diff --git a/drivers/mfd/omap-usb-host.c b/drivers/mfd/omap-usb-host.c
index 949feb03d4f8..06c208d8a992 100644
--- a/drivers/mfd/omap-usb-host.c
+++ b/drivers/mfd/omap-usb-host.c
@@ -498,7 +498,7 @@  static int usbhs_omap_get_dt_pdata(struct device *dev,
 			continue;
 
 		/* get 'enum usbhs_omap_port_mode' from port mode string */
-		ret = match_string(port_modes, ARRAY_SIZE(port_modes), mode);
+		ret = match_string(port_modes, mode);
 		if (ret < 0) {
 			dev_warn(dev, "Invalid port%d-mode \"%s\" in device tree\n",
 					i, mode);
diff --git a/drivers/mmc/host/sdhci-xenon-phy.c b/drivers/mmc/host/sdhci-xenon-phy.c
index cc9d28b75eb9..1865e26ae736 100644
--- a/drivers/mmc/host/sdhci-xenon-phy.c
+++ b/drivers/mmc/host/sdhci-xenon-phy.c
@@ -135,15 +135,14 @@  struct xenon_emmc_phy_regs {
 	u32 logic_timing_val;
 };
 
-static const char * const phy_types[] = {
-	"emmc 5.0 phy",
-	"emmc 5.1 phy"
-};
-
 enum xenon_phy_type_enum {
 	EMMC_5_0_PHY,
 	EMMC_5_1_PHY,
-	NR_PHY_TYPES
+};
+
+static const char * const phy_types[] = {
+	[EMMC_5_0_PHY] = "emmc 5.0 phy",
+	[EMMC_5_1_PHY] = "emmc 5.1 phy",
 };
 
 enum soc_pad_ctrl_type {
@@ -852,7 +851,7 @@  static int xenon_add_phy(struct device *dev, struct sdhci_host *host,
 	struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
 	int ret;
 
-	priv->phy_type = match_string(phy_types, NR_PHY_TYPES, phy_name);
+	priv->phy_type = match_string(phy_types, phy_name);
 	if (priv->phy_type < 0) {
 		dev_err(mmc_dev(host->mmc),
 			"Unable to determine PHY name %s. Use default eMMC 5.1 PHY\n",
diff --git a/drivers/mtd/nand/raw/nand_macronix.c b/drivers/mtd/nand/raw/nand_macronix.c
index e229de32ff50..8b3fb2c72bd6 100644
--- a/drivers/mtd/nand/raw/nand_macronix.c
+++ b/drivers/mtd/nand/raw/nand_macronix.c
@@ -178,8 +178,7 @@  static void macronix_nand_fix_broken_get_timings(struct nand_chip *chip)
 	if (!chip->parameters.supports_set_get_features)
 		return;
 
-	i = match_string(broken_get_timings, ARRAY_SIZE(broken_get_timings),
-			 chip->parameters.model);
+	i = match_string(broken_get_timings, chip->parameters.model);
 	if (i < 0)
 		return;
 
@@ -317,8 +316,7 @@  static void macronix_nand_deep_power_down_support(struct nand_chip *chip)
 		"MX30UF4G28AD",
 	};
 
-	i = match_string(deep_power_down_dev, ARRAY_SIZE(deep_power_down_dev),
-			 chip->parameters.model);
+	i = match_string(deep_power_down_dev, chip->parameters.model);
 	if (i < 0)
 		return;
 
@@ -461,9 +459,7 @@  static void macronix_nand_setup_otp(struct nand_chip *chip)
 	};
 	struct mtd_info *mtd;
 
-	if (match_string(supported_otp_models,
-			 ARRAY_SIZE(supported_otp_models),
-			 chip->parameters.model) < 0)
+	if (match_string(supported_otp_models, chip->parameters.model) < 0)
 		return;
 
 	if (!chip->parameters.supports_set_get_features)
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c b/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c
index 557c591a6ce3..cff23dc56641 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.c
@@ -4,7 +4,7 @@ 
  */
 
 #include <linux/sort.h>
-#include <linux/string.h>
+#include <linux/string_helpers.h>
 
 #include "t4_regs.h"
 #include "cxgb4.h"
@@ -1191,9 +1191,9 @@  static int cudbg_get_mem_region(struct adapter *padap,
 	if (rc)
 		return rc;
 
-	i = match_string(cudbg_region, ARRAY_SIZE(cudbg_region), region_name);
+	i = match_string(cudbg_region, region_name);
 	if (i < 0)
-		return -EINVAL;
+		return i;
 
 	idx = i;
 	for (i = 0; i < meminfo->mem_c; i++) {
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
index 79f4ac8cbc72..58388ca9ecfa 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c
@@ -724,7 +724,7 @@  iwl_dbgfs_bt_force_ant_write(struct iwl_mvm *mvm, char *buf,
 	};
 	int ret, bt_force_ant_mode;
 
-	ret = match_string(modes_str, ARRAY_SIZE(modes_str), buf);
+	ret = match_string(modes_str, buf);
 	if (ret < 0)
 		return ret;
 
diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
index ac6293c24976..2d317c7e1cea 100644
--- a/drivers/pci/pcie/aer.c
+++ b/drivers/pci/pcie/aer.c
@@ -210,7 +210,7 @@  void pcie_ecrc_get_policy(char *str)
 {
 	int i;
 
-	i = match_string(ecrc_policy_str, ARRAY_SIZE(ecrc_policy_str), str);
+	i = match_string(ecrc_policy_str, str);
 	if (i < 0)
 		return;
 
diff --git a/drivers/phy/mediatek/phy-mtk-tphy.c b/drivers/phy/mediatek/phy-mtk-tphy.c
index 25b86bbb9cec..762674acb7fc 100644
--- a/drivers/phy/mediatek/phy-mtk-tphy.c
+++ b/drivers/phy/mediatek/phy-mtk-tphy.c
@@ -389,7 +389,7 @@  static int u2_phy_params_show(struct seq_file *sf, void *unused)
 	u32 val = 0;
 	int ret;
 
-	ret = match_string(u2_phy_files, ARRAY_SIZE(u2_phy_files), fname);
+	ret = match_string(u2_phy_files, fname);
 	if (ret < 0)
 		return ret;
 
@@ -464,7 +464,7 @@  static ssize_t u2_phy_params_write(struct file *file, const char __user *ubuf,
 	if (rc)
 		return rc;
 
-	ret = match_string(u2_phy_files, ARRAY_SIZE(u2_phy_files), fname);
+	ret = match_string(u2_phy_files, fname);
 	if (ret < 0)
 		return (ssize_t)ret;
 
@@ -530,7 +530,7 @@  static int u3_phy_params_show(struct seq_file *sf, void *unused)
 	u32 tmp;
 	int ret;
 
-	ret = match_string(u3_phy_files, ARRAY_SIZE(u3_phy_files), fname);
+	ret = match_string(u3_phy_files, fname);
 	if (ret < 0)
 		return ret;
 
@@ -590,7 +590,7 @@  static ssize_t u3_phy_params_write(struct file *file, const char __user *ubuf,
 	if (rc)
 		return rc;
 
-	ret = match_string(u3_phy_files, ARRAY_SIZE(u3_phy_files), fname);
+	ret = match_string(u3_phy_files, fname);
 	if (ret < 0)
 		return (ssize_t)ret;
 
diff --git a/drivers/phy/tegra/xusb.c b/drivers/phy/tegra/xusb.c
index cfdb54b6070a..5fb8656aa31d 100644
--- a/drivers/phy/tegra/xusb.c
+++ b/drivers/phy/tegra/xusb.c
@@ -123,7 +123,7 @@  int tegra_xusb_lane_parse_dt(struct tegra_xusb_lane *lane,
 	if (err < 0)
 		return err;
 
-	err = match_string(lane->soc->funcs, lane->soc->num_funcs, function);
+	err = __match_string(lane->soc->funcs, lane->soc->num_funcs, function);
 	if (err < 0) {
 		dev_err(dev, "invalid function \"%s\" for lane \"%pOFn\"\n",
 			function, np);
@@ -748,7 +748,7 @@  static int tegra_xusb_usb2_port_parse_dt(struct tegra_xusb_usb2_port *usb2)
 	usb2->internal = of_property_read_bool(np, "nvidia,internal");
 
 	if (!of_property_read_string(np, "mode", &mode)) {
-		int err = match_string(modes, ARRAY_SIZE(modes), mode);
+		int err = match_string(modes, mode);
 		if (err < 0) {
 			dev_err(&port->dev, "invalid value %s for \"mode\"\n",
 				mode);
diff --git a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
index 4c4ada06423d..55b5464595b5 100644
--- a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
+++ b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c
@@ -352,7 +352,7 @@  static int armada_37xx_pmx_set_by_name(struct pinctrl_dev *pctldev,
 
 	dev_dbg(dev, "enable function %s group %s\n", name, grp->name);
 
-	func = match_string(grp->funcs, NB_FUNCS, name);
+	func = match_string(grp->funcs, name);
 	if (func < 0)
 		return -ENOTSUPP;
 
@@ -885,7 +885,7 @@  static int armada_37xx_fill_group(struct armada_37xx_pinctrl *info)
 		for (j = 0; j < grp->extra_npins; j++)
 			grp->pins[i+j] = grp->extra_pin + j;
 
-		for (f = 0; (f < NB_FUNCS) && grp->funcs[f]; f++) {
+		for (f = 0; (f < ARRAY_SIZE(grp->funcs)) && grp->funcs[f]; f++) {
 			int ret;
 			/* check for unique functions and count groups */
 			ret = armada_37xx_add_function(info->funcs, &funcsize,
@@ -937,7 +937,7 @@  static int armada_37xx_fill_func(struct armada_37xx_pinctrl *info)
 			struct armada_37xx_pin_group *gp = &info->groups[g];
 			int f;
 
-			f = match_string(gp->funcs, NB_FUNCS, name);
+			f = match_string(gp->funcs, name);
 			if (f < 0)
 				continue;
 
diff --git a/drivers/pinctrl/pinmux.c b/drivers/pinctrl/pinmux.c
index addba55334d9..af2334b16b94 100644
--- a/drivers/pinctrl/pinmux.c
+++ b/drivers/pinctrl/pinmux.c
@@ -23,7 +23,7 @@ 
 #include <linux/radix-tree.h>
 #include <linux/seq_file.h>
 #include <linux/slab.h>
-#include <linux/string.h>
+#include <linux/string_helpers.h>
 
 #include <linux/pinctrl/machine.h>
 #include <linux/pinctrl/pinctrl.h>
@@ -376,7 +376,7 @@  int pinmux_map_to_setting(const struct pinctrl_map *map,
 	}
 	if (map->data.mux.group) {
 		group = map->data.mux.group;
-		ret = match_string(groups, num_groups, group);
+		ret = __match_string(groups, num_groups, group);
 		if (ret < 0) {
 			dev_err(pctldev->dev,
 				"invalid group \"%s\" for function \"%s\"\n",
@@ -730,7 +730,7 @@  static ssize_t pinmux_select_write(struct file *file, const char __user *user_bu
 		goto exit_free_buf;
 	}
 
-	ret = match_string(groups, num_groups, gname);
+	ret = __match_string(groups, num_groups, gname);
 	if (ret < 0) {
 		dev_err(pctldev->dev, "invalid group %s", gname);
 		goto exit_free_buf;
diff --git a/drivers/platform/x86/hp/hp-wmi.c b/drivers/platform/x86/hp/hp-wmi.c
index 5fa553023842..ad7a9063c5d2 100644
--- a/drivers/platform/x86/hp/hp-wmi.c
+++ b/drivers/platform/x86/hp/hp-wmi.c
@@ -25,7 +25,7 @@ 
 #include <linux/hwmon.h>
 #include <linux/acpi.h>
 #include <linux/rfkill.h>
-#include <linux/string.h>
+#include <linux/string_helpers.h>
 #include <linux/dmi.h>
 
 MODULE_AUTHOR("Matthew Garrett <mjg59@srcf.ucam.org>");
@@ -443,18 +443,15 @@  static int hp_wmi_get_tablet_mode(void)
 {
 	char system_device_mode[4] = { 0 };
 	const char *chassis_type;
-	bool tablet_found;
 	int ret;
 
 	chassis_type = dmi_get_system_info(DMI_CHASSIS_TYPE);
 	if (!chassis_type)
 		return -ENODEV;
 
-	tablet_found = match_string(tablet_chassis_types,
-				    ARRAY_SIZE(tablet_chassis_types),
-				    chassis_type) >= 0;
-	if (!tablet_found)
-		return -ENODEV;
+	ret = match_string(tablet_chassis_types, chassis_type);
+	if (ret < 0)
+		return ret;
 
 	ret = hp_wmi_perform_query(HPWMI_SYSTEM_DEVICE_MODE, HPWMI_READ,
 				   system_device_mode, zero_if_sup(system_device_mode),
@@ -490,9 +487,7 @@  static bool is_omen_thermal_profile(void)
 	if (!board_name)
 		return false;
 
-	return match_string(omen_thermal_profile_boards,
-			    ARRAY_SIZE(omen_thermal_profile_boards),
-			    board_name) >= 0;
+	return match_string(omen_thermal_profile_boards, board_name) >= 0;
 }
 
 static int omen_get_thermal_policy_version(void)
@@ -503,9 +498,9 @@  static int omen_get_thermal_policy_version(void)
 	const char *board_name = dmi_get_system_info(DMI_BOARD_NAME);
 
 	if (board_name) {
-		int matches = match_string(omen_thermal_profile_force_v0_boards,
-			ARRAY_SIZE(omen_thermal_profile_force_v0_boards),
-			board_name);
+		int matches;
+
+		matches = match_string(omen_thermal_profile_force_v0_boards, board_name);
 		if (matches >= 0)
 			return 0;
 	}
@@ -1230,9 +1225,7 @@  static bool has_omen_thermal_profile_ec_timer(void)
 	if (!board_name)
 		return false;
 
-	return match_string(omen_timed_thermal_profile_boards,
-			    ARRAY_SIZE(omen_timed_thermal_profile_boards),
-			    board_name) >= 0;
+	return match_string(omen_timed_thermal_profile_boards, board_name) >= 0;
 }
 
 inline int omen_thermal_profile_ec_flags_set(enum hp_thermal_profile_omen_flags flags)
@@ -1376,9 +1369,7 @@  static bool is_victus_thermal_profile(void)
 	if (!board_name)
 		return false;
 
-	return match_string(victus_thermal_profile_boards,
-			    ARRAY_SIZE(victus_thermal_profile_boards),
-			    board_name) >= 0;
+	return match_string(victus_thermal_profile_boards, board_name) >= 0;
 }
 
 static int platform_profile_victus_get(struct platform_profile_handler *pprof,
diff --git a/drivers/platform/x86/msi-ec.c b/drivers/platform/x86/msi-ec.c
index f19504dbf164..a1b2dbb1a10f 100644
--- a/drivers/platform/x86/msi-ec.c
+++ b/drivers/platform/x86/msi-ec.c
@@ -25,7 +25,7 @@ 
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/seq_file.h>
-#include <linux/string.h>
+#include <linux/string_helpers.h>
 
 #define SM_ECO_NAME		"eco"
 #define SM_COMFORT_NAME		"comfort"
@@ -1316,7 +1316,7 @@  static int __init load_configuration(void)
 
 	/* load the suitable configuration, if exists */
 	for (int i = 0; CONFIGS[i]; i++) {
-		if (match_string(CONFIGS[i]->allowed_fw, -1, fw_version) != -EINVAL) {
+		if (__match_string(CONFIGS[i]->allowed_fw, -1, fw_version) >= 0) {
 			conf = *CONFIGS[i];
 			conf.allowed_fw = NULL;
 			return 0;
diff --git a/drivers/power/supply/ab8500_btemp.c b/drivers/power/supply/ab8500_btemp.c
index 56f136b2d071..824c71965150 100644
--- a/drivers/power/supply/ab8500_btemp.c
+++ b/drivers/power/supply/ab8500_btemp.c
@@ -556,7 +556,7 @@  static int ab8500_btemp_get_ext_psy_data(struct device *dev, void *data)
 	 * For all psy where the name of your driver
 	 * appears in any supplied_to
 	 */
-	j = match_string(supplicants, ext->num_supplicants, psy->desc->name);
+	j = __match_string(supplicants, ext->num_supplicants, psy->desc->name);
 	if (j < 0)
 		return 0;
 
diff --git a/drivers/power/supply/ab8500_chargalg.c b/drivers/power/supply/ab8500_chargalg.c
index 55ab7a28056e..230a4efee210 100644
--- a/drivers/power/supply/ab8500_chargalg.c
+++ b/drivers/power/supply/ab8500_chargalg.c
@@ -857,7 +857,7 @@  static int ab8500_chargalg_get_ext_psy_data(struct device *dev, void *data)
 	psy = (struct power_supply *)data;
 	di = power_supply_get_drvdata(psy);
 	/* For all psy where the driver name appears in any supplied_to */
-	j = match_string(supplicants, ext->num_supplicants, psy->desc->name);
+	j = __match_string(supplicants, ext->num_supplicants, psy->desc->name);
 	if (j < 0)
 		return 0;
 
diff --git a/drivers/power/supply/ab8500_charger.c b/drivers/power/supply/ab8500_charger.c
index 9b34d1a60f66..5eae14ca92fe 100644
--- a/drivers/power/supply/ab8500_charger.c
+++ b/drivers/power/supply/ab8500_charger.c
@@ -1902,7 +1902,7 @@  static int ab8500_charger_get_ext_psy_data(struct device *dev, void *data)
 	 * in practice what we will find will always be "ab8500_fg" as
 	 * the fuel gauge is responsible of keeping track of VBAT.
 	 */
-	j = match_string(supplicants, ext->num_supplicants, psy->desc->name);
+	j = __match_string(supplicants, ext->num_supplicants, psy->desc->name);
 	if (j < 0)
 		return 0;
 
diff --git a/drivers/power/supply/ab8500_fg.c b/drivers/power/supply/ab8500_fg.c
index 2ccaf6116c09..c3bc2833fc7e 100644
--- a/drivers/power/supply/ab8500_fg.c
+++ b/drivers/power/supply/ab8500_fg.c
@@ -2197,7 +2197,7 @@  static int ab8500_fg_get_ext_psy_data(struct device *dev, void *data)
 	 * For all psy where the name of your driver
 	 * appears in any supplied_to
 	 */
-	j = match_string(supplicants, ext->num_supplicants, psy->desc->name);
+	j = __match_string(supplicants, ext->num_supplicants, psy->desc->name);
 	if (j < 0)
 		return 0;
 
diff --git a/drivers/staging/gdm724x/gdm_tty.c b/drivers/staging/gdm724x/gdm_tty.c
index 15c246d3b1a3..e87987a93860 100644
--- a/drivers/staging/gdm724x/gdm_tty.c
+++ b/drivers/staging/gdm724x/gdm_tty.c
@@ -53,10 +53,9 @@  static int gdm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
 	struct gdm *gdm = NULL;
 	int ret;
 
-	ret = match_string(DRIVER_STRING, TTY_MAX_COUNT,
-			   tty->driver->driver_name);
+	ret = match_string(DRIVER_STRING, tty->driver->driver_name);
 	if (ret < 0)
-		return -ENODEV;
+		return ret;
 
 	mutex_lock(&gdm_table_lock);
 	gdm = gdm_table[ret][tty->index];
diff --git a/drivers/thermal/intel/int340x_thermal/processor_thermal_rfim.c b/drivers/thermal/intel/int340x_thermal/processor_thermal_rfim.c
index e56db75a94fb..dbd176b0fb1f 100644
--- a/drivers/thermal/intel/int340x_thermal/processor_thermal_rfim.c
+++ b/drivers/thermal/intel/int340x_thermal/processor_thermal_rfim.c
@@ -111,7 +111,7 @@  static ssize_t suffix##_show(struct device *dev,\
 		match_strs = (const char **)fivr_strings;\
 		mmio_regs = tgl_fivr_mmio_regs;\
 	} \
-	ret = match_string(match_strs, -1, attr->attr.name);\
+	ret = __match_string(match_strs, -1, attr->attr.name);\
 	if (ret < 0)\
 		return ret;\
 	reg_val = readl((void __iomem *) (proc_priv->mmio_base + mmio_regs[ret].offset));\
@@ -145,7 +145,7 @@  static ssize_t suffix##_store(struct device *dev,\
 		mmio_regs = tgl_fivr_mmio_regs;\
 	} \
 	\
-	ret = match_string(match_strs, -1, attr->attr.name);\
+	ret = __match_string(match_strs, -1, attr->attr.name);\
 	if (ret < 0)\
 		return ret;\
 	if (mmio_regs[ret].read_only)\
diff --git a/drivers/thermal/intel/int340x_thermal/processor_thermal_wt_req.c b/drivers/thermal/intel/int340x_thermal/processor_thermal_wt_req.c
index f298e7442662..57f456befb34 100644
--- a/drivers/thermal/intel/int340x_thermal/processor_thermal_wt_req.c
+++ b/drivers/thermal/intel/int340x_thermal/processor_thermal_wt_req.c
@@ -50,7 +50,7 @@  static ssize_t workload_type_store(struct device *dev,
 	if (ret != 1)
 		return -EINVAL;
 
-	ret = match_string(workload_types, -1, str_preference);
+	ret = __match_string(workload_types, -1, str_preference);
 	if (ret < 0)
 		return ret;
 
diff --git a/drivers/usb/common/common.c b/drivers/usb/common/common.c
index b84efae26e15..657be0162dd9 100644
--- a/drivers/usb/common/common.c
+++ b/drivers/usb/common/common.c
@@ -114,11 +114,11 @@  enum usb_device_speed usb_get_maximum_speed(struct device *dev)
 	if (ret < 0)
 		return USB_SPEED_UNKNOWN;
 
-	ret = match_string(ssp_rate, ARRAY_SIZE(ssp_rate), maximum_speed);
+	ret = match_string(ssp_rate, maximum_speed);
 	if (ret > 0)
 		return USB_SPEED_SUPER_PLUS;
 
-	ret = match_string(speed_names, ARRAY_SIZE(speed_names), maximum_speed);
+	ret = match_string(speed_names, maximum_speed);
 	return (ret < 0) ? USB_SPEED_UNKNOWN : ret;
 }
 EXPORT_SYMBOL_GPL(usb_get_maximum_speed);
@@ -141,7 +141,7 @@  enum usb_ssp_rate usb_get_maximum_ssp_rate(struct device *dev)
 	if (ret < 0)
 		return USB_SSP_GEN_UNKNOWN;
 
-	ret = match_string(ssp_rate, ARRAY_SIZE(ssp_rate), maximum_speed);
+	ret = match_string(ssp_rate, maximum_speed);
 	return (ret < 0) ? USB_SSP_GEN_UNKNOWN : ret;
 }
 EXPORT_SYMBOL_GPL(usb_get_maximum_ssp_rate);
@@ -184,7 +184,7 @@  static enum usb_dr_mode usb_get_dr_mode_from_string(const char *str)
 {
 	int ret;
 
-	ret = match_string(usb_dr_modes, ARRAY_SIZE(usb_dr_modes), str);
+	ret = match_string(usb_dr_modes, str);
 	return (ret < 0) ? USB_DR_MODE_UNKNOWN : ret;
 }
 
diff --git a/drivers/usb/dwc3/dwc3-rtk.c b/drivers/usb/dwc3/dwc3-rtk.c
index 3cd6b184551c..90cee91f4ff9 100644
--- a/drivers/usb/dwc3/dwc3-rtk.c
+++ b/drivers/usb/dwc3/dwc3-rtk.c
@@ -185,7 +185,7 @@  static enum usb_device_speed __get_dwc3_maximum_speed(struct device_node *np)
 	if (ret < 0)
 		goto out;
 
-	ret = match_string(speed_names, ARRAY_SIZE(speed_names), maximum_speed);
+	ret = match_string(speed_names, maximum_speed);
 
 out:
 	of_node_put(dwc3_np);
diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c
index 9610e647a8d4..7bc4695f8d0b 100644
--- a/drivers/usb/typec/class.c
+++ b/drivers/usb/typec/class.c
@@ -1986,8 +1986,7 @@  EXPORT_SYMBOL_GPL(typec_set_pwr_opmode);
  */
 int typec_find_pwr_opmode(const char *name)
 {
-	return match_string(typec_pwr_opmodes,
-			    ARRAY_SIZE(typec_pwr_opmodes), name);
+	return match_string(typec_pwr_opmodes, name);
 }
 EXPORT_SYMBOL_GPL(typec_find_pwr_opmode);
 
@@ -2001,8 +2000,7 @@  EXPORT_SYMBOL_GPL(typec_find_pwr_opmode);
  */
 int typec_find_orientation(const char *name)
 {
-	return match_string(typec_orientations, ARRAY_SIZE(typec_orientations),
-			    name);
+	return match_string(typec_orientations, name);
 }
 EXPORT_SYMBOL_GPL(typec_find_orientation);
 
@@ -2016,8 +2014,7 @@  EXPORT_SYMBOL_GPL(typec_find_orientation);
  */
 int typec_find_port_power_role(const char *name)
 {
-	return match_string(typec_port_power_roles,
-			    ARRAY_SIZE(typec_port_power_roles), name);
+	return match_string(typec_port_power_roles, name);
 }
 EXPORT_SYMBOL_GPL(typec_find_port_power_role);
 
@@ -2031,7 +2028,7 @@  EXPORT_SYMBOL_GPL(typec_find_port_power_role);
  */
 int typec_find_power_role(const char *name)
 {
-	return match_string(typec_roles, ARRAY_SIZE(typec_roles), name);
+	return match_string(typec_roles, name);
 }
 EXPORT_SYMBOL_GPL(typec_find_power_role);
 
@@ -2045,8 +2042,7 @@  EXPORT_SYMBOL_GPL(typec_find_power_role);
  */
 int typec_find_port_data_role(const char *name)
 {
-	return match_string(typec_port_data_roles,
-			    ARRAY_SIZE(typec_port_data_roles), name);
+	return match_string(typec_port_data_roles, name);
 }
 EXPORT_SYMBOL_GPL(typec_find_port_data_role);
 
diff --git a/drivers/usb/typec/tipd/core.c b/drivers/usb/typec/tipd/core.c
index ad76dbd20e65..2ce2d355a039 100644
--- a/drivers/usb/typec/tipd/core.c
+++ b/drivers/usb/typec/tipd/core.c
@@ -722,8 +722,7 @@  static int tps6598x_check_mode(struct tps6598x *tps)
 	if (ret)
 		return ret;
 
-	ret = match_string(modes, ARRAY_SIZE(modes), mode);
-
+	ret = match_string(modes, mode);
 	switch (ret) {
 	case TPS_MODE_APP:
 	case TPS_MODE_PTCH:
diff --git a/drivers/video/fbdev/pxafb.c b/drivers/video/fbdev/pxafb.c
index 2ef56fa28aff..f1b562b94744 100644
--- a/drivers/video/fbdev/pxafb.c
+++ b/drivers/video/fbdev/pxafb.c
@@ -37,9 +37,9 @@ 
 #include <linux/kernel.h>
 #include <linux/sched.h>
 #include <linux/errno.h>
-#include <linux/string.h>
 #include <linux/interrupt.h>
 #include <linux/slab.h>
+#include <linux/string_helpers.h>
 #include <linux/mm.h>
 #include <linux/fb.h>
 #include <linux/delay.h>
@@ -2107,7 +2107,7 @@  static int of_get_pxafb_display(struct device *dev, struct device_node *disp,
 	if (ret)
 		s = "color-tft";
 
-	i = match_string(lcd_types, -1, s);
+	i = __match_string(lcd_types, -1, s);
 	if (i < 0) {
 		dev_err(dev, "lcd-type %s is unknown\n", s);
 		return i;
diff --git a/fs/bcachefs/compress.c b/fs/bcachefs/compress.c
index 1410365a8891..a62c5dd5b470 100644
--- a/fs/bcachefs/compress.c
+++ b/fs/bcachefs/compress.c
@@ -667,7 +667,7 @@  int bch2_opt_compression_parse(struct bch_fs *c, const char *_val, u64 *res,
 	type_str = strsep(&p, ":");
 	level_str = p;
 
-	ret = match_string(bch2_compression_opts, -1, type_str);
+	ret = __match_string(bch2_compression_opts, -1, type_str);
 	if (ret < 0 && err)
 		prt_str(err, "invalid compression type");
 	if (ret < 0)
diff --git a/fs/bcachefs/opts.c b/fs/bcachefs/opts.c
index bb068fd72465..cbe4e820419f 100644
--- a/fs/bcachefs/opts.c
+++ b/fs/bcachefs/opts.c
@@ -122,7 +122,7 @@  static int bch2_opt_fix_errors_parse(struct bch_fs *c, const char *val, u64 *res
 	if (!val) {
 		*res = FSCK_FIX_yes;
 	} else {
-		int ret = match_string(bch2_fsck_fix_opts, -1, val);
+		int ret = __match_string(bch2_fsck_fix_opts, -1, val);
 
 		if (ret < 0 && err)
 			prt_str(err, "fix_errors: invalid selection");
@@ -366,7 +366,7 @@  int bch2_opt_parse(struct bch_fs *c,
 			return -EINVAL;
 		}
 
-		ret = match_string(opt->choices, -1, val);
+		ret = __match_string(opt->choices, -1, val);
 		if (ret < 0) {
 			if (err)
 				prt_printf(err, "%s: invalid selection",
diff --git a/fs/bcachefs/util.c b/fs/bcachefs/util.c
index de331dec2a99..8cef641a38fb 100644
--- a/fs/bcachefs/util.c
+++ b/fs/bcachefs/util.c
@@ -19,7 +19,7 @@ 
 #include <linux/preempt.h>
 #include <linux/random.h>
 #include <linux/seq_file.h>
-#include <linux/string.h>
+#include <linux/string_helpers.h>
 #include <linux/types.h>
 #include <linux/sched/clock.h>
 
@@ -215,7 +215,7 @@  u64 bch2_read_flag_list(char *opt, const char * const list[])
 	s = strim(d);
 
 	while ((p = strsep(&s, ","))) {
-		int flag = match_string(list, -1, p);
+		int flag = __match_string(list, -1, p);
 
 		if (flag < 0) {
 			ret = -1;
diff --git a/fs/ubifs/auth.c b/fs/ubifs/auth.c
index a4a0158f712d..fc0da18bfa65 100644
--- a/fs/ubifs/auth.c
+++ b/fs/ubifs/auth.c
@@ -264,13 +264,13 @@  int ubifs_init_authentication(struct ubifs_info *c)
 		return -EINVAL;
 	}
 
-	c->auth_hash_algo = match_string(hash_algo_name, HASH_ALGO__LAST,
-					 c->auth_hash_name);
-	if ((int)c->auth_hash_algo < 0) {
+	err = __match_string(hash_algo_name, HASH_ALGO__LAST, c->auth_hash_name);
+	if (err < 0) {
 		ubifs_err(c, "Unknown hash algo %s specified",
 			  c->auth_hash_name);
-		return -EINVAL;
+		return err;
 	}
+	c->auth_hash_algo = err;
 
 	snprintf(hmac_name, CRYPTO_MAX_ALG_NAME, "hmac(%s)",
 		 c->auth_hash_name);
diff --git a/include/linux/string.h b/include/linux/string.h
index 60168aa2af07..92fc7631f6a4 100644
--- a/include/linux/string.h
+++ b/include/linux/string.h
@@ -303,8 +303,18 @@  extern unsigned long long memparse(const char *ptr, char **retptr);
 extern bool parse_option_str(const char *str, const char *option);
 extern char *next_arg(char *args, char **param, char **val);
 
+int __match_string(const char * const *array, size_t n, const char *string);
+
+/**
+ * match_string - matches given string in an array
+ * @_a: array of strings
+ * @_s: string to match with
+ *
+ * Helper for __match_string(). Calculates the size of @a automatically.
+ */
+#define match_string(_a, _s) __match_string(_a, ARRAY_SIZE(_a), _s)
+
 extern bool sysfs_streq(const char *s1, const char *s2);
-int match_string(const char * const *array, size_t n, const char *string);
 int __sysfs_match_string(const char * const *array, size_t n, const char *s);
 
 /**
diff --git a/kernel/cgroup/rdma.c b/kernel/cgroup/rdma.c
index ef5878fb2005..10105cfc5981 100644
--- a/kernel/cgroup/rdma.c
+++ b/kernel/cgroup/rdma.c
@@ -366,7 +366,7 @@  static int parse_resource(char *c, int *intval)
 	if (!name || !value)
 		return -EINVAL;
 
-	i = match_string(rdmacg_resource_names, RDMACG_RESOURCE_MAX, name);
+	i = match_string(rdmacg_resource_names, name);
 	if (i < 0)
 		return i;
 
diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
index c1eb9a1afd13..b6238341e3c0 100644
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -105,7 +105,7 @@  static int sched_feat_set(char *cmp)
 		cmp += 3;
 	}
 
-	i = match_string(sched_feat_names, __SCHED_FEAT_NR, cmp);
+	i = __match_string(sched_feat_names, __SCHED_FEAT_NR, cmp);
 	if (i < 0)
 		return i;
 
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 578a49ff5c32..13c0a1fa30cd 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -32,7 +32,6 @@ 
 #include <linux/percpu.h>
 #include <linux/splice.h>
 #include <linux/kdebug.h>
-#include <linux/string.h>
 #include <linux/mount.h>
 #include <linux/rwsem.h>
 #include <linux/slab.h>
@@ -45,6 +44,7 @@ 
 #include <linux/trace.h>
 #include <linux/sched/clock.h>
 #include <linux/sched/rt.h>
+#include <linux/string_helpers.h>
 #include <linux/fsnotify.h>
 #include <linux/irq_work.h>
 #include <linux/workqueue.h>
@@ -5309,7 +5309,7 @@  int trace_set_options(struct trace_array *tr, char *option)
 	mutex_lock(&event_mutex);
 	mutex_lock(&trace_types_lock);
 
-	ret = match_string(trace_options, -1, cmp);
+	ret = __match_string(trace_options, -1, cmp);
 	/* If no option could be set, test the specific tracer options */
 	if (ret < 0)
 		ret = set_tracer_option(tr, cmp, neg);
diff --git a/kernel/trace/trace_osnoise.c b/kernel/trace/trace_osnoise.c
index a8e28f9b9271..7bed499effd3 100644
--- a/kernel/trace/trace_osnoise.c
+++ b/kernel/trace/trace_osnoise.c
@@ -2230,9 +2230,9 @@  static ssize_t osnoise_options_write(struct file *filp, const char __user *ubuf,
 		enable = false;
 	}
 
-	option = match_string(osnoise_options_str, OSN_MAX, option_str);
+	option = match_string(osnoise_options_str, option_str);
 	if (option < 0)
-		return -EINVAL;
+		return option;
 
 	/*
 	 * trace_types_lock is taken to avoid concurrency on start/stop.
diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index f2c5e7910bb1..cd4fbcea38ba 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -24,7 +24,6 @@ 
 #include <linux/list.h>
 #include <linux/sysctl.h>
 #include <linux/ctype.h>
-#include <linux/string.h>
 #include <linux/parser.h>
 #include <linux/string_helpers.h>
 #include <linux/uaccess.h>
@@ -154,7 +153,7 @@  static struct ddebug_class_map *ddebug_find_valid_class(struct ddebug_table cons
 	int idx;
 
 	list_for_each_entry(map, &dt->maps, link) {
-		idx = match_string(map->class_names, map->length, class_string);
+		idx = __match_string(map->class_names, map->length, class_string);
 		if (idx >= 0) {
 			*class_id = idx + map->base;
 			return map;
@@ -665,7 +664,7 @@  static int param_set_dyndbg_classnames(const char *instr, const struct kernel_pa
 			if (*cl_str == '+')
 				cl_str++;
 		}
-		cls_id = match_string(map->class_names, map->length, cl_str);
+		cls_id = __match_string(map->class_names, map->length, cl_str);
 		if (cls_id < 0) {
 			pr_err("%s unknown to %s\n", cl_str, KP_NAME(kp));
 			continue;
diff --git a/lib/string_helpers.c b/lib/string_helpers.c
index 69ba49b853c7..d3d0d2154146 100644
--- a/lib/string_helpers.c
+++ b/lib/string_helpers.c
@@ -898,7 +898,7 @@  bool sysfs_streq(const char *s1, const char *s2)
 EXPORT_SYMBOL(sysfs_streq);
 
 /**
- * match_string - matches given string in an array
+ * __match_string - matches given string in an array
  * @array:	array of strings
  * @n:		number of strings in the array or -1 for NULL terminated arrays
  * @string:	string to match with
@@ -914,7 +914,7 @@  EXPORT_SYMBOL(sysfs_streq);
  * Return:
  * index of a @string in the @array if matches, or %-EINVAL otherwise.
  */
-int match_string(const char * const *array, size_t n, const char *string)
+int __match_string(const char * const *array, size_t n, const char *string)
 {
 	int index;
 	const char *item;
@@ -929,7 +929,7 @@  int match_string(const char * const *array, size_t n, const char *string)
 
 	return -EINVAL;
 }
-EXPORT_SYMBOL(match_string);
+EXPORT_SYMBOL(__match_string);
 
 /**
  * __sysfs_match_string - matches given string in an array
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index aec756ae5637..89c132170431 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -89,7 +89,6 @@ 
 #include <linux/nodemask.h>
 #include <linux/cpuset.h>
 #include <linux/slab.h>
-#include <linux/string.h>
 #include <linux/export.h>
 #include <linux/nsproxy.h>
 #include <linux/interrupt.h>
@@ -103,6 +102,7 @@ 
 #include <linux/ksm.h>
 #include <linux/rmap.h>
 #include <linux/security.h>
+#include <linux/string_helpers.h>
 #include <linux/syscalls.h>
 #include <linux/ctype.h>
 #include <linux/mm_inline.h>
@@ -3183,7 +3183,7 @@  int mpol_parse_str(char *str, struct mempolicy **mpol)
 	} else
 		nodes_clear(nodes);
 
-	mode = match_string(policy_modes, MPOL_MAX, str);
+	mode = match_string(policy_modes, str);
 	if (mode < 0)
 		goto out;
 
diff --git a/mm/vmpressure.c b/mm/vmpressure.c
index bd5183dfd879..eaaa133ce12b 100644
--- a/mm/vmpressure.c
+++ b/mm/vmpressure.c
@@ -388,7 +388,7 @@  int vmpressure_register_event(struct mem_cgroup *memcg,
 
 	/* Find required level */
 	token = strsep(&spec, ",");
-	ret = match_string(vmpressure_str_levels, VMPRESSURE_NUM_LEVELS, token);
+	ret = match_string(vmpressure_str_levels, token);
 	if (ret < 0)
 		goto out;
 	level = ret;
@@ -396,7 +396,7 @@  int vmpressure_register_event(struct mem_cgroup *memcg,
 	/* Find optional mode */
 	token = strsep(&spec, ",");
 	if (token) {
-		ret = match_string(vmpressure_str_modes, VMPRESSURE_NUM_MODES, token);
+		ret = match_string(vmpressure_str_modes, token);
 		if (ret < 0)
 			goto out;
 		mode = ret;
diff --git a/security/apparmor/lsm.c b/security/apparmor/lsm.c
index 6239777090c4..e3fc94b4c7e5 100644
--- a/security/apparmor/lsm.c
+++ b/security/apparmor/lsm.c
@@ -1820,9 +1820,9 @@  static int param_set_audit(const char *val, const struct kernel_param *kp)
 	if (apparmor_initialized && !aa_current_policy_admin_capable(NULL))
 		return -EPERM;
 
-	i = match_string(audit_mode_names, AUDIT_MAX_INDEX, val);
+	i = __match_string(audit_mode_names, AUDIT_MAX_INDEX, val);
 	if (i < 0)
-		return -EINVAL;
+		return i;
 
 	aa_g_audit = i;
 	return 0;
@@ -1849,10 +1849,9 @@  static int param_set_mode(const char *val, const struct kernel_param *kp)
 	if (apparmor_initialized && !aa_current_policy_admin_capable(NULL))
 		return -EPERM;
 
-	i = match_string(aa_profile_mode_names, APPARMOR_MODE_NAMES_MAX_INDEX,
-			 val);
+	i = __match_string(aa_profile_mode_names, APPARMOR_MODE_NAMES_MAX_INDEX, val);
 	if (i < 0)
-		return -EINVAL;
+		return i;
 
 	aa_g_profile_mode = i;
 	return 0;
diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c
index f04f43af651c..49d6e9cc3387 100644
--- a/security/integrity/ima/ima_main.c
+++ b/security/integrity/ima/ima_main.c
@@ -64,7 +64,7 @@  static int __init hash_setup(char *str)
 		goto out;
 	}
 
-	i = match_string(hash_algo_name, HASH_ALGO__LAST, str);
+	i = __match_string(hash_algo_name, HASH_ALGO__LAST, str);
 	if (i < 0) {
 		pr_err("invalid hash algorithm \"%s\"", str);
 		return 1;
diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c
index c0556907c2e6..fa67c5794071 100644
--- a/security/integrity/ima/ima_policy.c
+++ b/security/integrity/ima/ima_policy.c
@@ -1380,7 +1380,7 @@  static unsigned int ima_parse_appraise_algos(char *arg)
 	char *token;
 
 	while ((token = strsep(&arg, ",")) != NULL) {
-		idx = match_string(hash_algo_name, HASH_ALGO__LAST, token);
+		idx = __match_string(hash_algo_name, HASH_ALGO__LAST, token);
 
 		if (idx < 0) {
 			pr_err("unknown hash algorithm \"%s\"",
diff --git a/sound/firewire/oxfw/oxfw.c b/sound/firewire/oxfw/oxfw.c
index 98ae0e8cba87..5b38069daa0a 100644
--- a/sound/firewire/oxfw/oxfw.c
+++ b/sound/firewire/oxfw/oxfw.c
@@ -59,7 +59,7 @@  static bool detect_loud_models(struct fw_unit *unit)
 	if (err < 0)
 		return false;
 
-	return match_string(models, ARRAY_SIZE(models), model) >= 0;
+	return match_string(models, model) >= 0;
 }
 
 static int name_card(struct snd_oxfw *oxfw, const struct ieee1394_device_id *entry)
diff --git a/sound/pci/oxygen/oxygen_mixer.c b/sound/pci/oxygen/oxygen_mixer.c
index eb3aca16359c..73e15d5d6be9 100644
--- a/sound/pci/oxygen/oxygen_mixer.c
+++ b/sound/pci/oxygen/oxygen_mixer.c
@@ -1074,7 +1074,7 @@  static int add_controls(struct oxygen *chip,
 		err = snd_ctl_add(chip->card, ctl);
 		if (err < 0)
 			return err;
-		j = match_string(known_ctl_names, CONTROL_COUNT, ctl->id.name);
+		j = match_string(known_ctl_names, ctl->id.name);
 		if (j >= 0) {
 			chip->controls[j] = ctl;
 			ctl->private_free = oxygen_any_ctl_free;
diff --git a/sound/soc/codecs/max98088.c b/sound/soc/codecs/max98088.c
index 8b56ee550c09..4736a4ba0e1f 100644
--- a/sound/soc/codecs/max98088.c
+++ b/sound/soc/codecs/max98088.c
@@ -1414,7 +1414,7 @@  static int max98088_get_channel(struct snd_soc_component *component, const char
 {
 	int ret;
 
-	ret = match_string(eq_mode_name, ARRAY_SIZE(eq_mode_name), name);
+	ret = match_string(eq_mode_name, name);
 	if (ret < 0)
 		dev_err(component->dev, "Bad EQ channel name '%s'\n", name);
 	return ret;
diff --git a/sound/soc/codecs/max98095.c b/sound/soc/codecs/max98095.c
index 7e525d49328d..430bce3333a9 100644
--- a/sound/soc/codecs/max98095.c
+++ b/sound/soc/codecs/max98095.c
@@ -1627,7 +1627,7 @@  static int max98095_get_bq_channel(struct snd_soc_component *component,
 {
 	int ret;
 
-	ret = match_string(bq_mode_name, ARRAY_SIZE(bq_mode_name), name);
+	ret = match_string(bq_mode_name, name);
 	if (ret < 0)
 		dev_err(component->dev, "Bad biquad channel name '%s'\n", name);
 	return ret;
diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index 16dad4a45443..7064f4cae549 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -769,14 +769,13 @@  static int dapm_connect_mux(struct snd_soc_dapm_context *dapm,
 		item = 0;
 	}
 
-	i = match_string(e->texts, e->items, control_name);
+	i = __match_string(e->texts, e->items, control_name);
 	if (i < 0)
-		return -ENODEV;
+		return i;
 
 	path->name = e->texts[i];
 	path->connect = (i == item);
 	return 0;
-
 }
 
 /* set up initial codec paths */