[MIPS] Cleanup memory barriers for weakly ordered systems.

Also the R4000 / R4600 LL/SC instructions imply a sync so no explicit sync
needed.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 3947e5daea39..4d64960be035 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1277,6 +1277,7 @@ config CPU_RM9000
         select CPU_SUPPORTS_32BIT_KERNEL
         select CPU_SUPPORTS_64BIT_KERNEL
         select CPU_SUPPORTS_HIGHMEM
+        select WEAK_ORDERING
 
 config CPU_SB1
         bool "SB1"
@@ -1285,6 +1286,7 @@ config CPU_SB1
         select CPU_SUPPORTS_32BIT_KERNEL
         select CPU_SUPPORTS_64BIT_KERNEL
         select CPU_SUPPORTS_HIGHMEM
+        select WEAK_ORDERING
 
 endchoice
 
@@ -1345,6 +1347,8 @@ config SYS_HAS_CPU_RM9000
 config SYS_HAS_CPU_SB1
         bool
 
+config WEAK_ORDERING
+        bool
 endmenu
 
 #