From 153d0609ded1ae29817ede712b957cb6a9fe81be Mon Sep 17 00:00:00 2001
From: Masamichi Takagi <masamichi.takagi@riken.jp>
Date: Mon, 27 Jan 2020 09:49:58 +0000
Subject: [PATCH] ihk_os_{read,write}_cpu_register: Add async support

Change-Id: Ia2a2098550e856eeffbb20d8d0e0bcd57b85b6d7
---
 executer/kernel/mcctrl/control.c | 3 +++
 ihk                              | 2 +-
 kernel/include/syscall.h         | 1 +
 3 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/executer/kernel/mcctrl/control.c b/executer/kernel/mcctrl/control.c
index 95b981fd..0ccd32c2 100644
--- a/executer/kernel/mcctrl/control.c
+++ b/executer/kernel/mcctrl/control.c
@@ -3438,6 +3438,9 @@ int __mcctrl_os_read_write_cpu_register(ihk_os_t os, int cpu,
 		desc->val = resp.val;
 	}
 
+	/* Notify caller (for future async implementation) */
+	atomic_set(&desc->sync, 1);
+
 	dprintk("%s: MCCTRL_OS_CPU_%s_REGISTER: reg: 0x%lx, val: 0x%lx\n",
 		__FUNCTION__,
 		(op == MCCTRL_OS_CPU_READ_REGISTER ? "READ" : "WRITE"),
diff --git a/ihk b/ihk
index 76124839..fdd513f4 160000
--- a/ihk
+++ b/ihk
@@ -1 +1 @@
-Subproject commit 761248395d55b82ead3b913162eadfaec698004c
+Subproject commit fdd513f41ce783544576c9e349badc8fd6582ab4
diff --git a/kernel/include/syscall.h b/kernel/include/syscall.h
index 73a865fe..c289bd13 100644
--- a/kernel/include/syscall.h
+++ b/kernel/include/syscall.h
@@ -248,6 +248,7 @@ struct ihk_os_cpu_register {
 	unsigned long addr;
 	unsigned long val;
 	unsigned long addr_ext;
+	int sync; /* atomic_t in Linux counterpart */
 };
 
 enum mcctrl_os_cpu_operation {