Restartable sequences: only keep rseq lib parts needed by ust

[lttng-ust.git] / libringbuffer / rseq-x86.h

diff --git a/libringbuffer/rseq-x86.h b/libringbuffer/rseq-x86.h
index 7154bfa49697f987ded459926670b072647d1e76..29e5647d6963c5ed412772ed729b834f7a56a295 100644 (file)
--- a/libringbuffer/rseq-x86.h
+++ b/libringbuffer/rseq-x86.h
@@ -24,25 +24,6 @@
 
 #ifdef __x86_64__
 
-#define smp_mb()       __asm__ __volatile__ ("mfence" : : : "memory")
-#define smp_rmb()      barrier()
-#define smp_wmb()      barrier()
-
-#define smp_load_acquire(p)                                            \
-__extension__ ({                                                       \
-       __typeof(*p) ____p1 = READ_ONCE(*p);                            \
-       barrier();                                                      \
-       ____p1;                                                         \
-})
-
-#define smp_acquire__after_ctrl_dep()  smp_rmb()
-
-#define smp_store_release(p, v)                                                \
-do {                                                                   \
-       barrier();                                                      \
-       WRITE_ONCE(*p, v);                                              \
-} while (0)
-
 #define has_fast_acquire_release()     1
 #define has_single_copy_load_64()      1
 
@@ -159,32 +140,6 @@ do { \
 
 #elif __i386__
 
-/*
- * Support older 32-bit architectures that do not implement fence
- * instructions.
- */
-#define smp_mb()       \
-       __asm__ __volatile__ ("lock; addl $0,0(%%esp)" : : : "memory")
-#define smp_rmb()      \
-       __asm__ __volatile__ ("lock; addl $0,0(%%esp)" : : : "memory")
-#define smp_wmb()      \
-       __asm__ __volatile__ ("lock; addl $0,0(%%esp)" : : : "memory")
-
-#define smp_load_acquire(p)                                            \
-__extension__ ({                                                       \
-       __typeof(*p) ____p1 = READ_ONCE(*p);                            \
-       smp_mb();                                                       \
-       ____p1;                                                         \
-})
-
-#define smp_acquire__after_ctrl_dep()  smp_rmb()
-
-#define smp_store_release(p, v)                                                \
-do {                                                                   \
-       smp_mb();                                                       \
-       WRITE_ONCE(*p, v);                                              \
-} while (0)
-
 #define has_fast_acquire_release()     0
 #define has_single_copy_load_64()      0