[PATCH] x86/boot: fix kaslr-enabled build

[Sergey Senozhatsky]

Both pgtable_64 and kaslr_64 define `__force_order', which breaks
the build:

ld: arch/x86/boot/compressed/pgtable_64.o:(.bss+0x0): multiple definition of `__force_order';
arch/x86/boot/compressed/kaslr_64.o:(.bss+0x0): first defined here

Make KASLR use extern pgtable_64's definition.

Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@xxxxxxxxx>
---
 arch/x86/boot/compressed/kaslr_64.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/boot/compressed/kaslr_64.c b/arch/x86/boot/compressed/kaslr_64.c
index 748456c365f4..274df8f9e659 100644
--- a/arch/x86/boot/compressed/kaslr_64.c
+++ b/arch/x86/boot/compressed/kaslr_64.c
@@ -30,7 +30,7 @@
 #include "../../mm/ident_map.c"
 
 /* Used by pgtable.h asm code to force instruction serialization. */
-unsigned long __force_order;
+extern unsigned long __force_order;
 
 /* Used to track our page table allocation area. */
 struct alloc_pgt_data {
-- 
2.25.0