On 9/25/21 2:30 AM, Simon Glass wrote:
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 <s...@chromium.org>
Reviewed-by: Heinrich Schuchardt <xypron.g...@gmx.de>
---

(no changes since v1)

  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;

You already have:
arch/x86/include/asm/global_data.h:139:
#define DECLARE_GLOBAL_DATA_PTR   extern struct global_data *global_data_ptr

Why don't you use DECLARE_GLOBAL_DATA_PTR where needed?

Best regards

Heinrich

+
  /* TODO(s...@chromium.org): Consider using a fixed register for gd on x86_64 
*/
  #define gd global_data_ptr



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