diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index a48cf582dcd00bcc8a9bfd92a3dad5aede3fb708..7c0906367239a1ea1fa5c2d9702d2ff9f9e7d85b 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -13,6 +13,8 @@
  *
  */
 
+#define pr_fmt(fmt) "%s:" fmt, __func__
+
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/device.h>
@@ -771,8 +773,8 @@ static int machine_constraints_voltage(struct regulator_dev *rdev,
 
 		/* else require explicit machine-level constraints */
 		if (cmin <= 0 || cmax <= 0 || cmax < cmin) {
-			pr_err("%s: %s '%s' voltage constraints\n",
-				       __func__, "invalid", name);
+			pr_err("%s '%s' voltage constraints\n", "invalid",
+				name);
 			return -EINVAL;
 		}
 
@@ -793,22 +795,22 @@ static int machine_constraints_voltage(struct regulator_dev *rdev,
 
 		/* final: [min_uV..max_uV] valid iff constraints valid */
 		if (max_uV < min_uV) {
-			pr_err("%s: %s '%s' voltage constraints\n",
-				       __func__, "unsupportable", name);
+			pr_err("%s '%s' voltage constraints\n", "unsupportable",
+				name);
 			return -EINVAL;
 		}
 
 		/* use regulator's subset of machine constraints */
 		if (constraints->min_uV < min_uV) {
-			pr_debug("%s: override '%s' %s, %d -> %d\n",
-				       __func__, name, "min_uV",
-					constraints->min_uV, min_uV);
+			pr_debug("override '%s' %s, %d -> %d\n",
+				 name, "min_uV",
+				 constraints->min_uV, min_uV);
 			constraints->min_uV = min_uV;
 		}
 		if (constraints->max_uV > max_uV) {
-			pr_debug("%s: override '%s' %s, %d -> %d\n",
-				       __func__, name, "max_uV",
-					constraints->max_uV, max_uV);
+			pr_debug("override '%s' %s, %d -> %d\n",
+				 name, "max_uV",
+				 constraints->max_uV, max_uV);
 			constraints->max_uV = max_uV;
 		}
 	}