[PATCH v2 07/16] x86/compressed: efi: merge multiple definitions of image_offset into one

[Ard Biesheuvel]

There is no need for head_32.S and head_64.S both declaring a copy of
the globale 'image_offset' variable, so drop those and make the extern C
declaration the definition.

Signed-off-by: Ard Biesheuvel <ardb@xxxxxxxxxx>
---
 arch/x86/boot/compressed/head_32.S      | 4 ----
 arch/x86/boot/compressed/head_64.S      | 4 ----
 drivers/firmware/efi/libstub/x86-stub.c | 2 +-
 3 files changed, 1 insertion(+), 9 deletions(-)

diff --git a/arch/x86/boot/compressed/head_32.S b/arch/x86/boot/compressed/head_32.S
index 3b354eb9516d..6589ddd4cfaf 100644
--- a/arch/x86/boot/compressed/head_32.S
+++ b/arch/x86/boot/compressed/head_32.S
@@ -208,10 +208,6 @@ SYM_DATA_START_LOCAL(gdt)
 	.quad	0x00cf92000000ffff	/* __KERNEL_DS */
 SYM_DATA_END_LABEL(gdt, SYM_L_LOCAL, gdt_end)
 
-#ifdef CONFIG_EFI_STUB
-SYM_DATA(image_offset, .long 0)
-#endif
-
 /*
  * Stack and heap for uncompression
  */
diff --git a/arch/x86/boot/compressed/head_64.S b/arch/x86/boot/compressed/head_64.S
index 8da2396a35a8..90b119fbef58 100644
--- a/arch/x86/boot/compressed/head_64.S
+++ b/arch/x86/boot/compressed/head_64.S
@@ -718,10 +718,6 @@ SYM_DATA_START(boot32_idt)
 SYM_DATA_END_LABEL(boot32_idt, SYM_L_GLOBAL, boot32_idt_end)
 #endif
 
-#ifdef CONFIG_EFI_STUB
-SYM_DATA(image_offset, .long 0)
-#endif
-
 #ifdef CONFIG_AMD_MEM_ENCRYPT
 	__HEAD
 	.code32
diff --git a/drivers/firmware/efi/libstub/x86-stub.c b/drivers/firmware/efi/libstub/x86-stub.c
index 05ae8bcc9d67..9083ccc1d46b 100644
--- a/drivers/firmware/efi/libstub/x86-stub.c
+++ b/drivers/firmware/efi/libstub/x86-stub.c
@@ -23,7 +23,7 @@
 
 const efi_system_table_t *efi_system_table;
 const efi_dxe_services_table_t *efi_dxe_table;
-extern u32 image_offset;
+u32 image_offset;
 static efi_loaded_image_t *image = NULL;
 
 static efi_status_t
-- 
2.35.1