File _service:tar_scm:1001-update-risv-support.patch of Package mvapich2

diff --git a/src/mpid/ch3/channels/common/include/mv2_clock.h b/src/mpid/ch3/channels/common/include/mv2_clock.h
index 77552c4..b7e41a3 100644
--- a/src/mpid/ch3/channels/common/include/mv2_clock.h
+++ b/src/mpid/ch3/channels/common/include/mv2_clock.h
@@ -93,6 +93,14 @@ static inline cycles_t get_cycles()
        return ret;
 }
 
+#elif defined(__riscv)
+// this function don't call
+typedef unsigned long cycles_t;
+static inline cycles_t get_cycles()
+{
+       return 0;
+}
+
 #else
 #warning get_cycles not implemented for this architecture: attempt asm/timex.h
 #include <asm/timex.h>
diff --git a/src/mpid/ch3/channels/common/src/util/mv2_clock.c b/src/mpid/ch3/channels/common/src/util/mv2_clock.c
index 4d9eb0a..74d5686 100644
--- a/src/mpid/ch3/channels/common/src/util/mv2_clock.c
+++ b/src/mpid/ch3/channels/common/src/util/mv2_clock.c
@@ -52,7 +52,7 @@
 /* For gettimeofday */
 #define _BSD_SOURCE
 #include <sys/time.h>
-
+#include <time.h>
 #include <unistd.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -218,6 +218,21 @@ double get_cpu_mhz()
 
 #ifndef DISABLE_LOW_LEVEL_TIMERS
 
+#if  defined(__riscv)
+void mv2_init_timers()
+{
+}
+double mv2_get_time_us()
+{
+    struct timespec ts;
+    if (clock_gettime(CLOCK_REALTIME,&ts) == -1){
+        PRINT_ERROR("Error in clock_gettime.");
+        exit(-1);
+    }
+    long long time_us = (long long )ts.tv_sec * 1000000 + ts.tv_nsec / 1000;
+    return (double)time_us;
+}
+#else
 void mv2_init_timers()
 {
     global_mhz = get_cpu_mhz();
@@ -231,6 +246,7 @@ double mv2_get_time_us()
 {
     return (get_cycles()/global_mhz);
 }
+#endif
 
 #else