x86, fixmap: define reserve_top_address for x86_64

Impact: new interface (not yet use)

Define reserve_top_address for x86_64; only for later x86 integration.

Signed-off-by: Gustavo F. Padovan <gustavo@las.ic.unicamp.br>
Acked-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/x86/include/asm/fixmap_64.h b/arch/x86/include/asm/fixmap_64.h
index d905de086753..b6c06dd55f1c 100644
--- a/arch/x86/include/asm/fixmap_64.h
+++ b/arch/x86/include/asm/fixmap_64.h
@@ -68,6 +68,8 @@ enum fixed_addresses {
         __end_of_fixed_addresses
 };
 
+extern void reserve_top_address(unsigned long reserve);
+
 #define FIXADDR_TOP     (VSYSCALL_END-PAGE_SIZE)
 
 #define FIXADDR_SIZE    (__end_of_permanent_fixed_addresses << PAGE_SHIFT)