mips: reuse asm-generic/barrier.h

On mips dma_rmb, dma_wmb, smp_store_mb, read_barrier_depends,
smp_read_barrier_depends, smp_store_release and smp_load_acquire  match
the asm-generic variants exactly. Drop the local definitions and pull in
asm-generic/barrier.h instead.

This is in preparation to refactoring this code area.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>

1 files changed, 2 insertions, 23 deletions

diff --git a/arch/mips/include/asm/barrier.h b/arch/mips/include/asm/barrier.h
index 752e0b86c171..3eac4b909355 100644
--- a/arch/mips/include/asm/barrier.h
+++ b/arch/mips/include/asm/barrier.h
@@ -10,9 +10,6 @@
 
 #include <asm/addrspace.h>
 
-#define read_barrier_depends()          do { } while(0)
-#define smp_read_barrier_depends()      do { } while(0)
-
 #ifdef CONFIG_CPU_HAS_SYNC
 #define __sync()                                \
         __asm__ __volatile__(                   \
@@ -87,8 +84,6 @@
 
 #define wmb()           fast_wmb()
 #define rmb()           fast_rmb()
-#define dma_wmb()       fast_wmb()
-#define dma_rmb()       fast_rmb()
 
 #if defined(CONFIG_WEAK_ORDERING) && defined(CONFIG_SMP)
 # ifdef CONFIG_CPU_CAVIUM_OCTEON
@@ -112,9 +107,6 @@
 #define __WEAK_LLSC_MB          "               \n"
 #endif
 
-#define smp_store_mb(var, value) \
-        do { WRITE_ONCE(var, value); smp_mb(); } while (0)
-
 #define smp_llsc_mb()   __asm__ __volatile__(__WEAK_LLSC_MB : : :"memory")
 
 #ifdef CONFIG_CPU_CAVIUM_OCTEON
@@ -129,22 +121,9 @@
 #define nudge_writes() mb()
 #endif
 
-#define smp_store_release(p, v)                                         \
-do {                                                                    \
-        compiletime_assert_atomic_type(*p);                             \
-        smp_mb();                                                       \
-        WRITE_ONCE(*p, v);                                              \
-} while (0)
-
-#define smp_load_acquire(p)                                             \
-({                                                                      \
-        typeof(*p) ___p1 = READ_ONCE(*p);                               \
-        compiletime_assert_atomic_type(*p);                             \
-        smp_mb();                                                       \
-        ___p1;                                                          \
-})
-
 #define smp_mb__before_atomic() smp_mb__before_llsc()
 #define smp_mb__after_atomic()  smp_llsc_mb()
 
+#include <asm-generic/barrier.h>
+
 #endif /* __ASM_BARRIER_H */