Delete (void)func() casts considered cruft in Linux style.

GCC's inability to warn when return values are ignored has conditioned
Linux programmers into thinking that this is actually normal.

delete some #define's -- suggested by Matt Wilcox

arch/i386/kernel/acpi/boot.c

@@ -128,7 +128,9 @@ static int __init acpi_parse_mcfg(unsigned long phys_addr, unsigned long size)
 
 	return 0;
 }
-#endif /* CONFIG_PCI_MMCONFIG */
+#else
+#define	acpi_parse_mcfg NULL
+#endif /* !CONFIG_PCI_MMCONFIG */
 
 #ifdef CONFIG_X86_LOCAL_APIC
 static int __init
@@ -424,6 +426,8 @@ static int __init acpi_parse_hpet(unsigned long phys, unsigned long size)
 	       hpet_address);
 	return 0;
 }
+#else
+#define	acpi_parse_hpet NULL
 #endif
 
 unsigned long __init
@@ -635,7 +639,7 @@ acpi_boot_init (void)
 		return error;
 	}
 
-	(void) acpi_table_parse(ACPI_BOOT, acpi_parse_sbf);
+	acpi_table_parse(ACPI_BOOT, acpi_parse_sbf);
 
 	/*
 	 * blacklist may disable ACPI entirely
@@ -652,15 +656,9 @@ acpi_boot_init (void)
 	 */
 	acpi_process_madt();
 
-#ifdef CONFIG_HPET_TIMER
-	(void) acpi_table_parse(ACPI_HPET, acpi_parse_hpet);
-#endif
+	acpi_table_parse(ACPI_HPET, acpi_parse_hpet);
 
-#ifdef CONFIG_PCI_MMCONFIG
-	error = acpi_table_parse(ACPI_MCFG, acpi_parse_mcfg);
-	if (error)
-		printk(KERN_ERR PREFIX "Error %d parsing MCFG\n", error);
-#endif
+	acpi_table_parse(ACPI_MCFG, acpi_parse_mcfg);
 
 	return 0;
 }

drivers/acpi/tables.c

@@ -386,8 +386,13 @@ acpi_table_parse (
 	for (i = 0; i < sdt_count; i++) {
 		if (sdt_entry[i].id != id)
 			continue;
-		handler(sdt_entry[i].pa, sdt_entry[i].size);
 		count++;
+		if (count == 1)
+			handler(sdt_entry[i].pa, sdt_entry[i].size);
+
+		else
+			printk(KERN_WARNING PREFIX "%d duplicate %s table ignored.\n",
+				count, acpi_table_signatures[id]);
 	}
 
 	return count;