mm/early_ioremap.c: use __func__ instead of function name

It is better to use __func__ instead of function name.

Link: https://lkml.kernel.org/r/1611385587-4209-1-git-send-email-stephenzhangzsd@gmail.comSigned-off-by: Stephen Zhang <stephenzhangzsd@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/early_ioremap.c

@@ -181,17 +181,17 @@ void __init early_iounmap(void __iomem *addr, unsigned long size)
 		}
 	}
 
-	if (WARN(slot < 0, "early_iounmap(%p, %08lx) not found slot\n",
-		 addr, size))
+	if (WARN(slot < 0, "%s(%p, %08lx) not found slot\n",
+		  __func__, addr, size))
 		return;
 
 	if (WARN(prev_size[slot] != size,
-		 "early_iounmap(%p, %08lx) [%d] size not consistent %08lx\n",
-		 addr, size, slot, prev_size[slot]))
+		 "%s(%p, %08lx) [%d] size not consistent %08lx\n",
+		  __func__, addr, size, slot, prev_size[slot]))
 		return;
 
-	WARN(early_ioremap_debug, "early_iounmap(%p, %08lx) [%d]\n",
-	     addr, size, slot);
+	WARN(early_ioremap_debug, "%s(%p, %08lx) [%d]\n",
+	      __func__, addr, size, slot);
 
 	virt_addr = (unsigned long)addr;
 	if (WARN_ON(virt_addr < fix_to_virt(FIX_BTMAP_BEGIN)))