[PATCH 2/2] x86: Enable named address spaces for percpu data

[Matthew Wilcox]

From: Richard Henderson <rth@xxxxxxxxxxx>

For ease of disabling this feature, split the actual enabling into its
own patch.

Signed-off-by: Richard Henderson <rth@xxxxxxxxxxx>
Signed-off-by: Matthew Wilcox <willy@xxxxxxxxxxxxx>
---
 arch/x86/include/asm/percpu.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/x86/include/asm/percpu.h b/arch/x86/include/asm/percpu.h
index 30a08d0d95ee..f3c5eebcbc86 100644
--- a/arch/x86/include/asm/percpu.h
+++ b/arch/x86/include/asm/percpu.h
@@ -5,9 +5,15 @@
 #ifdef CONFIG_X86_64
 #define __percpu_seg		gs
 #define __percpu_mov_op		movq
+# ifdef __SEG_GS
+#  define __percpu_addrspace	__seg_gs
+# endif
 #else
 #define __percpu_seg		fs
 #define __percpu_mov_op		movl
+# ifdef __SEG_FS
+#  define __percpu_addrspace	__seg_fs
+# endif
 #endif
 
 #ifdef __ASSEMBLY__
-- 
2.18.0