Add barrier definitions for RISC-V

Signed-off-by: David Abdurachmanov <david.abdurachmanov@gmail.com>

rdma-core-20.1-riscv-barriers.patch

@@ -0,0 +1,31 @@
+diff --git a/util/udma_barrier.h b/util/udma_barrier.h
+index 23acf23..899acf5 100644
+--- a/util/udma_barrier.h
++++ b/util/udma_barrier.h
+@@ -96,6 +96,8 @@
+ #define udma_to_device_barrier() asm volatile("dsb st" ::: "memory");
+ #elif defined(__sparc__) || defined(__s390x__)
+ #define udma_to_device_barrier() asm volatile("" ::: "memory")
++#elif defined(__riscv)
++#define udma_to_device_barrier() asm volatile("fence w,w" ::: "memory");
+ #else
+ #error No architecture specific memory barrier defines found!
+ #endif
+@@ -128,6 +130,8 @@
+ #define udma_from_device_barrier() asm volatile("dsb ld" ::: "memory");
+ #elif defined(__sparc__) || defined(__s390x__)
+ #define udma_from_device_barrier() asm volatile("" ::: "memory")
++#elif defined(__riscv)
++#define udma_from_device_barrier() asm volatile("fence r,rw" ::: "memory");
+ #else
+ #error No architecture specific memory barrier defines found!
+ #endif
+@@ -192,6 +196,8 @@
+ #define mmio_flush_writes() asm volatile("dsb st" ::: "memory");
+ #elif defined(__sparc__) || defined(__s390x__)
+ #define mmio_flush_writes() asm volatile("" ::: "memory")
++#elif defined(__riscv)
++#define mmio_flush_writes() asm volatile("fence w,w" ::: "memory");
+ #else
+ #error No architecture specific memory barrier defines found!
+ #endif

rdma-core.spec

@@ -15,6 +15,8 @@ License: GPLv2 or BSD
 Url: https://github.com/linux-rdma/rdma-core
 Source: https://github.com/linux-rdma/rdma-core/releases/download/v%{version}/%{name}-%{version}.tar.gz
 
+Patch0: rdma-core-20.1-riscv-barriers.patch
+
 BuildRequires: binutils
 BuildRequires: cmake >= 2.8.11
 BuildRequires: gcc
@@ -239,6 +241,7 @@ discover and use SCSI devices via the SCSI RDMA Protocol over InfiniBand.
 
 %prep
 %setup
+%patch0 -p1 -b .riscv
 
 %build