arch-riscv: Ignore sched_yield syscall in SE mode

Change-Id: I14f22c06eb8fdbe063980b4cd0a49387b9113a97
Reviewed-on: https://gem5-review.googlesource.com/6961
Maintainer: Brandon Potter <Brandon.Potter@amd.com>
Reviewed-by: Alec Roelke <ar4jc@virginia.edu>
diff --git a/src/arch/riscv/linux/process.cc b/src/arch/riscv/linux/process.cc
index 4c10efe..0f540af 100644
--- a/src/arch/riscv/linux/process.cc
+++ b/src/arch/riscv/linux/process.cc
@@ -193,7 +193,7 @@
     {121,  SyscallDesc("sched_getparam")},
     {122,  SyscallDesc("sched_setaffinity")},
     {123,  SyscallDesc("sched_getaffinity")},
-    {124,  SyscallDesc("sched_yield")},
+    {124,  SyscallDesc("sched_yield", ignoreFunc, SyscallDesc::WarnOnce)},
     {125,  SyscallDesc("sched_get_priority_max")},
     {126,  SyscallDesc("sched_get_priority_min")},
     {127,  SyscallDesc("scheD_rr_get_interval")},