1 files changed, 3 insertions, 1 deletions

diff --git a/arch/x86/um/asm/system.h b/arch/x86/um/asm/system.h
index a89113bc74f2..a459fd9b7598 100644
--- a/arch/x86/um/asm/system.h
+++ b/arch/x86/um/asm/system.h
@@ -6,7 +6,6 @@
 #include <asm/cpufeature.h>
 #include <asm/cmpxchg.h>
 #include <asm/nops.h>
-#include <asm/system-um.h>
 
 #include <linux/kernel.h>
 #include <linux/irqflags.h>
@@ -130,4 +129,7 @@ static inline void rdtsc_barrier(void)
         alternative(ASM_NOP3, "lfence", X86_FEATURE_LFENCE_RDTSC);
 }
 
+extern void *_switch_to(void *prev, void *next, void *last);
+#define switch_to(prev, next, last) prev = _switch_to(prev, next, last)
+
 #endif