2 files changed, 6 insertions, 6 deletions

diff --git a/include/asm-um/processor-x86_64.h b/include/asm-um/processor-x86_64.h
index 10609af376c0..31c2d4d685bd 100644
--- a/include/asm-um/processor-x86_64.h
+++ b/include/asm-um/processor-x86_64.h
@@ -13,6 +13,7 @@
 struct arch_thread {
         unsigned long debugregs[8];
         int debugregs_seq;
+        unsigned long fs;
         struct faultinfo faultinfo;
 };
 
@@ -25,8 +26,9 @@ extern inline void rep_nop(void)
 #define cpu_relax()   rep_nop()
 
 #define INIT_ARCH_THREAD { .debugregs           = { [ 0 ... 7 ] = 0 }, \
-                           .debugregs_seq       = 0, \
-                           .faultinfo           = { 0, 0, 0 } }
+                           .debugregs_seq       = 0,                           \
+                           .fs                  = 0, \
+                           .faultinfo           = { 0, 0, 0 } }
 
 static inline void arch_flush_thread(struct arch_thread *thread)
 {
diff --git a/include/asm-um/ptrace-x86_64.h b/include/asm-um/ptrace-x86_64.h
index 03b4af4ac09a..a927450ce401 100644
--- a/include/asm-um/ptrace-x86_64.h
+++ b/include/asm-um/ptrace-x86_64.h
@@ -81,9 +81,7 @@ static inline void arch_switch_to_tt(struct task_struct *from,
 {
 }
 
-static inline void arch_switch_to_skas(struct task_struct *from,
-                                       struct task_struct *to)
-{
-}
+extern void arch_switch_to_skas(struct task_struct *from,
+                                struct task_struct *to);
 
 #endif