diff --git a/drivers/acpi/apei/erst.c b/drivers/acpi/apei/erst.c
index 88d0b0f9f92b..853e4cf1bc9e 100644
--- a/drivers/acpi/apei/erst.c
+++ b/drivers/acpi/apei/erst.c
@@ -39,7 +39,8 @@
 
 #include "apei-internal.h"
 
-#define ERST_PFX "ERST: "
+#undef pr_fmt
+#define pr_fmt(fmt) "ERST: " fmt
 
 /* ERST command status */
 #define ERST_STATUS_SUCCESS			0x0
@@ -109,8 +110,7 @@ static inline int erst_errno(int command_status)
 static int erst_timedout(u64 *t, u64 spin_unit)
 {
 	if ((s64)*t < spin_unit) {
-		pr_warning(FW_WARN ERST_PFX
-			   "Firmware does not respond in time\n");
+		pr_warn(FW_WARN "Firmware does not respond in time\n");
 		return 1;
 	}
 	*t -= spin_unit;
@@ -186,7 +186,7 @@ static int erst_exec_stall(struct apei_exec_context *ctx,
 
 	if (ctx->value > FIRMWARE_MAX_STALL) {
 		if (!in_nmi())
-			pr_warning(FW_WARN ERST_PFX
+			pr_warn(FW_WARN
 			"Too long stall time for stall instruction: %llx.\n",
 				   ctx->value);
 		stall_time = FIRMWARE_MAX_STALL;
@@ -206,7 +206,7 @@ static int erst_exec_stall_while_true(struct apei_exec_context *ctx,
 
 	if (ctx->var1 > FIRMWARE_MAX_STALL) {
 		if (!in_nmi())
-			pr_warning(FW_WARN ERST_PFX
+			pr_warn(FW_WARN
 		"Too long stall time for stall while true instruction: %llx.\n",
 				   ctx->var1);
 		stall_time = FIRMWARE_MAX_STALL;
@@ -271,8 +271,7 @@ static int erst_exec_move_data(struct apei_exec_context *ctx,
 
 	/* ioremap does not work in interrupt context */
 	if (in_interrupt()) {
-		pr_warning(ERST_PFX
-			   "MOVE_DATA can not be used in interrupt context");
+		pr_warn("MOVE_DATA can not be used in interrupt context");
 		return -EBUSY;
 	}
 
@@ -522,8 +521,7 @@ retry:
 				     ERST_RECORD_ID_CACHE_SIZE_MAX);
 		if (new_size <= erst_record_id_cache.size) {
 			if (printk_ratelimit())
-				pr_warning(FW_WARN ERST_PFX
-					   "too many record ID!\n");
+				pr_warn(FW_WARN "too many record IDs!\n");
 			return 0;
 		}
 		alloc_size = new_size * sizeof(entries[0]);
@@ -759,8 +757,7 @@ static int __erst_clear_from_storage(u64 record_id)
 static void pr_unimpl_nvram(void)
 {
 	if (printk_ratelimit())
-		pr_warning(ERST_PFX
-		"NVRAM ERST Log Address Range is not implemented yet\n");
+		pr_warn("NVRAM ERST Log Address Range is not implemented yet\n");
 }
 
 static int __erst_write_to_nvram(const struct cper_record_header *record)
@@ -1120,7 +1117,7 @@ static int __init erst_init(void)
 		goto err;
 
 	if (erst_disable) {
-		pr_info(ERST_PFX
+		pr_info(
 	"Error Record Serialization Table (ERST) support is disabled.\n");
 		goto err;
 	}
@@ -1131,14 +1128,14 @@ static int __init erst_init(void)
 		goto err;
 	else if (ACPI_FAILURE(status)) {
 		const char *msg = acpi_format_exception(status);
-		pr_err(ERST_PFX "Failed to get table, %s\n", msg);
+		pr_err("Failed to get table, %s\n", msg);
 		rc = -EINVAL;
 		goto err;
 	}
 
 	rc = erst_check_table(erst_tab);
 	if (rc) {
-		pr_err(FW_BUG ERST_PFX "ERST table is invalid\n");
+		pr_err(FW_BUG "ERST table is invalid\n");
 		goto err;
 	}
 
@@ -1156,21 +1153,19 @@ static int __init erst_init(void)
 	rc = erst_get_erange(&erst_erange);
 	if (rc) {
 		if (rc == -ENODEV)
-			pr_info(ERST_PFX
+			pr_info(
 	"The corresponding hardware device or firmware implementation "
 	"is not available.\n");
 		else
-			pr_err(ERST_PFX
-			       "Failed to get Error Log Address Range.\n");
+			pr_err("Failed to get Error Log Address Range.\n");
 		goto err_unmap_reg;
 	}
 
 	r = request_mem_region(erst_erange.base, erst_erange.size, "APEI ERST");
 	if (!r) {
-		pr_err(ERST_PFX
-		"Can not request iomem region <0x%16llx-0x%16llx> for ERST.\n",
-		(unsigned long long)erst_erange.base,
-		(unsigned long long)erst_erange.base + erst_erange.size);
+		pr_err("Can not request [mem %#010llx-%#010llx] for ERST.\n",
+		       (unsigned long long)erst_erange.base,
+		       (unsigned long long)erst_erange.base + erst_erange.size);
 		rc = -EIO;
 		goto err_unmap_reg;
 	}
@@ -1180,7 +1175,7 @@ static int __init erst_init(void)
 	if (!erst_erange.vaddr)
 		goto err_release_erange;
 
-	pr_info(ERST_PFX
+	pr_info(
 	"Error Record Serialization Table (ERST) support is initialized.\n");
 
 	buf = kmalloc(erst_erange.size, GFP_KERNEL);
@@ -1192,14 +1187,14 @@ static int __init erst_init(void)
 		rc = pstore_register(&erst_info);
 		if (rc) {
 			if (rc != -EPERM)
-				pr_info(ERST_PFX
+				pr_info(
 				"Could not register with persistent store\n");
 			erst_info.buf = NULL;
 			erst_info.bufsize = 0;
 			kfree(buf);
 		}
 	} else
-		pr_err(ERST_PFX
+		pr_err(
 		"Failed to allocate %lld bytes for persistent store error log\n",
 		erst_erange.size);
 
