[Precise] [PATCH 06/12] x86, efi: Cleanup config table walking

[Brad Figg]

From: Olof Johansson <olof at lixom.net>

BugLink: http://bugs.launchpad.net/bugs/1111689

Trivial cleanup, move guid and table pointers to local copies to
make the code cleaner.

Signed-off-by: Olof Johansson <olof at lixom.net>
Link: http://lkml.kernel.org/r/1329081869-20779-4-git-send-email-olof@lixom.net
Acked-by: Matt Fleming <matt.fleming at intel.com>
Signed-off-by: H. Peter Anvin <hpa at zytor.com>
(cherry picked from commit a6a46f415dca828a04a435ca1f67de0bc5b9ae30)
Signed-off-by: Brad Figg <brad.figg at canonical.com>
---
 arch/x86/platform/efi/efi.c |   61 ++++++++++++++++++++-----------------------
 1 file changed, 28 insertions(+), 33 deletions(-)

diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
index b6ef331..7108a76 100644
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -460,53 +460,48 @@ static void __init efi_systab_init(void *phys)
 static void __init efi_config_init(u64 tables, int nr_tables)
 {
 	efi_config_table_t *config_tables;
-	int i;
+	int i, sz = sizeof(efi_config_table_t);
 
 	/*
 	 * Let's see what config tables the firmware passed to us.
 	 */
-	config_tables = early_ioremap(
-		efi.systab->tables,
-		efi.systab->nr_tables * sizeof(efi_config_table_t));
+	config_tables = early_ioremap(efi.systab->tables,
+				      efi.systab->nr_tables * sz);
 	if (config_tables == NULL)
 		pr_err("Could not map Configuration table!\n");
 
 	pr_info("");
 	for (i = 0; i < efi.systab->nr_tables; i++) {
-		if (!efi_guidcmp(config_tables[i].guid, MPS_TABLE_GUID)) {
-			efi.mps = config_tables[i].table;
-			pr_cont(" MPS=0x%lx ", config_tables[i].table);
-		} else if (!efi_guidcmp(config_tables[i].guid,
-					ACPI_20_TABLE_GUID)) {
-			efi.acpi20 = config_tables[i].table;
-			pr_cont(" ACPI 2.0=0x%lx ", config_tables[i].table);
-		} else if (!efi_guidcmp(config_tables[i].guid,
-					ACPI_TABLE_GUID)) {
-			efi.acpi = config_tables[i].table;
-			pr_cont(" ACPI=0x%lx ", config_tables[i].table);
-		} else if (!efi_guidcmp(config_tables[i].guid,
-					SMBIOS_TABLE_GUID)) {
-			efi.smbios = config_tables[i].table;
-			pr_cont(" SMBIOS=0x%lx ", config_tables[i].table);
+		efi_guid_t guid = config_tables[i].guid;
+		unsigned long table = config_tables[i].table;
+
+		if (!efi_guidcmp(guid, MPS_TABLE_GUID)) {
+			efi.mps = table;
+			pr_cont(" MPS=0x%lx ", table);
+		} else if (!efi_guidcmp(guid, ACPI_20_TABLE_GUID)) {
+			efi.acpi20 = table;
+			pr_cont(" ACPI 2.0=0x%lx ", table);
+		} else if (!efi_guidcmp(guid, ACPI_TABLE_GUID)) {
+			efi.acpi = table;
+			pr_cont(" ACPI=0x%lx ", table);
+		} else if (!efi_guidcmp(guid, SMBIOS_TABLE_GUID)) {
+			efi.smbios = table;
+			pr_cont(" SMBIOS=0x%lx ", table);
 #ifdef CONFIG_X86_UV
-		} else if (!efi_guidcmp(config_tables[i].guid,
-					UV_SYSTEM_TABLE_GUID)) {
-			efi.uv_systab = config_tables[i].table;
-			pr_cont(" UVsystab=0x%lx ", config_tables[i].table);
+		} else if (!efi_guidcmp(guid, UV_SYSTEM_TABLE_GUID)) {
+			efi.uv_systab = table;
+			pr_cont(" UVsystab=0x%lx ", table);
 #endif
-		} else if (!efi_guidcmp(config_tables[i].guid,
-					HCDP_TABLE_GUID)) {
-			efi.hcdp = config_tables[i].table;
-			pr_cont(" HCDP=0x%lx ", config_tables[i].table);
-		} else if (!efi_guidcmp(config_tables[i].guid,
-					UGA_IO_PROTOCOL_GUID)) {
-			efi.uga = config_tables[i].table;
-			pr_cont(" UGA=0x%lx ", config_tables[i].table);
+		} else if (!efi_guidcmp(guid, HCDP_TABLE_GUID)) {
+			efi.hcdp = table;
+			pr_cont(" HCDP=0x%lx ", table);
+		} else if (!efi_guidcmp(guid, UGA_IO_PROTOCOL_GUID)) {
+			efi.uga = table;
+			pr_cont(" UGA=0x%lx ", table);
 		}
 	}
 	pr_cont("\n");
-	early_iounmap(config_tables,
-			  efi.systab->nr_tables * sizeof(efi_config_table_t));
+	early_iounmap(config_tables, efi.systab->nr_tables * sz);
 }
 
 static void __init efi_runtime_init(void)
-- 
1.7.9.5