1 files changed, 3 insertions, 1 deletions

diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index fc5004a4b07d..445348facea9 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -161,7 +161,9 @@ void ftrace_likely_update(struct ftrace_likely_data *f, int val,
 #endif
 
 #ifndef OPTIMIZER_HIDE_VAR
-#define OPTIMIZER_HIDE_VAR(var) barrier()
+/* Make the optimizer believe the variable can be manipulated arbitrarily. */
+#define OPTIMIZER_HIDE_VAR(var)                                         \
+        __asm__ ("" : "=r" (var) : "0" (var))
 #endif
 
 /* Not-quite-unique ID. */