x86, efi: remove duplicate code in setup_arch() by using, efi_is_native()

The check, "IS_ENABLED(CONFIG_X86_64) != efi_enabled(EFI_64BIT)",
in setup_arch() can be replaced by efi_is_enabled(). This change
remove duplicate code and improve readability.

Signed-off-by: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Olof Johansson <olof@lixom.net>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>

3 files changed, 9 insertions, 8 deletions

diff --git a/arch/x86/include/asm/efi.h b/arch/x86/include/asm/efi.h
index 28677c55113f..60c89f30c727 100644
--- a/arch/x86/include/asm/efi.h
+++ b/arch/x86/include/asm/efi.h
@@ -102,7 +102,14 @@ extern void efi_call_phys_epilog(void);
 extern void efi_unmap_memmap(void);
 extern void efi_memory_uc(u64 addr, unsigned long size);
 
-#ifndef CONFIG_EFI
+#ifdef CONFIG_EFI
+
+static inline bool efi_is_native(void)
+{
+        return IS_ENABLED(CONFIG_X86_64) == efi_enabled(EFI_64BIT);
+}
+
+#else
 /*
  * IF EFI is not configured, have the EFI calls return -ENOSYS.
  */
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 8b24289cc10c..1abb7969173a 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -1135,8 +1135,7 @@ void __init setup_arch(char **cmdline_p)
          * mismatched firmware/kernel archtectures since there is no
          * support for runtime services.
          */
-        if (efi_enabled(EFI_BOOT) &&
-            IS_ENABLED(CONFIG_X86_64) != efi_enabled(EFI_64BIT)) {
+        if (efi_enabled(EFI_BOOT) && !efi_is_native()) {
                 pr_info("efi: Setup done, disabling due to 32/64-bit mismatch\n");
                 efi_unmap_memmap();
         }
diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
index 77cf0090c0a3..e075e474245b 100644
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -69,11 +69,6 @@ struct efi_memory_map memmap;
 static struct efi efi_phys __initdata;
 static efi_system_table_t efi_systab __initdata;
 
-static inline bool efi_is_native(void)
-{
-        return IS_ENABLED(CONFIG_X86_64) == efi_enabled(EFI_64BIT);
-}
-
 unsigned long x86_efi_facility;
 
 /*