atomic: remove all traces of READ_ONCE_CTRL() and atomic*_read_ctrl()

[karo-tx-linux.git] / include / linux / compiler.h

diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index 3d7810341b579795398e36cb15597feb344bb912..fe817432190c1cfb4c3108bbdfaf71b22916b8f8 100644 (file)
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -299,22 +299,6 @@ static __always_inline void __write_once_size(volatile void *p, void *res, int s
        __u.__val;                                      \
 })
 
-/**
- * READ_ONCE_CTRL - Read a value heading a control dependency
- * @x: The value to be read, heading the control dependency
- *
- * Control dependencies are tricky.  See Documentation/memory-barriers.txt
- * for important information on how to use them.  Note that in many cases,
- * use of smp_load_acquire() will be much simpler.  Control dependencies
- * should be avoided except on the hottest of hotpaths.
- */
-#define READ_ONCE_CTRL(x) \
-({ \
-       typeof(x) __val = READ_ONCE(x); \
-       smp_read_barrier_depends(); /* Enforce control dependency. */ \
-       __val; \
-})
-
 #endif /* __KERNEL__ */
 
 #endif /* __ASSEMBLY__ */