These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / arch / x86 / include / asm / barrier.h

diff --git a/kernel/arch/x86/include/asm/barrier.h b/kernel/arch/x86/include/asm/barrier.h
index 959e45b..0681d25 100644 (file)
--- a/kernel/arch/x86/include/asm/barrier.h
+++ b/kernel/arch/x86/include/asm/barrier.h
@@ -35,12 +35,12 @@
 #define smp_mb()       mb()
 #define smp_rmb()      dma_rmb()
 #define smp_wmb()      barrier()
-#define set_mb(var, value) do { (void)xchg(&var, value); } while (0)
+#define smp_store_mb(var, value) do { (void)xchg(&var, value); } while (0)
 #else /* !SMP */
 #define smp_mb()       barrier()
 #define smp_rmb()      barrier()
 #define smp_wmb()      barrier()
-#define set_mb(var, value) do { var = value; barrier(); } while (0)
+#define smp_store_mb(var, value) do { WRITE_ONCE(var, value); barrier(); } while (0)
 #endif /* SMP */
 
 #define read_barrier_depends()         do { } while (0)
@@ -57,12 +57,12 @@
 do {                                                                   \
        compiletime_assert_atomic_type(*p);                             \
        smp_mb();                                                       \
-       ACCESS_ONCE(*p) = (v);                                          \
+       WRITE_ONCE(*p, v);                                              \
 } while (0)
 
 #define smp_load_acquire(p)                                            \
 ({                                                                     \
-       typeof(*p) ___p1 = ACCESS_ONCE(*p);                             \
+       typeof(*p) ___p1 = READ_ONCE(*p);                               \
        compiletime_assert_atomic_type(*p);                             \
        smp_mb();                                                       \
        ___p1;                                                          \
@@ -74,12 +74,12 @@ do {                                                                        \
 do {                                                                   \
        compiletime_assert_atomic_type(*p);                             \
        barrier();                                                      \
-       ACCESS_ONCE(*p) = (v);                                          \
+       WRITE_ONCE(*p, v);                                              \
 } while (0)
 
 #define smp_load_acquire(p)                                            \
 ({                                                                     \
-       typeof(*p) ___p1 = ACCESS_ONCE(*p);                             \
+       typeof(*p) ___p1 = READ_ONCE(*p);                               \
        compiletime_assert_atomic_type(*p);                             \
        barrier();                                                      \
        ___p1;                                                          \
@@ -91,15 +91,4 @@ do {                                                                 \
 #define smp_mb__before_atomic()        barrier()
 #define smp_mb__after_atomic() barrier()
 
-/*
- * Stop RDTSC speculation. This is needed when you need to use RDTSC
- * (or get_cycles or vread that possibly accesses the TSC) in a defined
- * code region.
- */
-static __always_inline void rdtsc_barrier(void)
-{
-       alternative_2("", "mfence", X86_FEATURE_MFENCE_RDTSC,
-                         "lfence", X86_FEATURE_LFENCE_RDTSC);
-}
-
 #endif /* _ASM_X86_BARRIER_H */