[PATCH 04/35] x86: Tidy up global_data pointer for 64-bit

[Simon Glass <sjg@chromium.org>]

Add an extern declaration so that it is possible to use this macro in
files other than the one that defines it.

Signed-off-by: Simon Glass <sjg@chromium.org>
---

 arch/x86/cpu/x86_64/cpu.c          | 3 +++
 arch/x86/include/asm/global_data.h | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/arch/x86/cpu/x86_64/cpu.c b/arch/x86/cpu/x86_64/cpu.c
index 90a766c3c57..e090b1b478a 100644
--- a/arch/x86/cpu/x86_64/cpu.c
+++ b/arch/x86/cpu/x86_64/cpu.c
@@ -8,6 +8,9 @@
 #include <cpu_func.h>
 #include <debug_uart.h>
 #include <init.h>
+#include <asm/global_data.h>
+
+DECLARE_GLOBAL_DATA_PTR;
 
 /*
  * Global declaration of gd.
diff --git a/arch/x86/include/asm/global_data.h b/arch/x86/include/asm/global_data.h
index 3e4044593c8..f95fb5a1931 100644
--- a/arch/x86/include/asm/global_data.h
+++ b/arch/x86/include/asm/global_data.h
@@ -133,6 +133,8 @@ struct arch_global_data {
 #ifndef __ASSEMBLY__
 # if defined(CONFIG_EFI_APP) || CONFIG_IS_ENABLED(X86_64)
 
+extern struct global_data *global_data_ptr;
+
 /* TODO(sjg@chromium.org): Consider using a fixed register for gd on x86_64 */
 #define gd global_data_ptr
 
-- 
2.33.0.153.gba50c8fa24-goog