From ae770f09d3266634f28e01c3c1a714ee05e9d796 Mon Sep 17 00:00:00 2001
From: Stephen Rothwell <sfr@canb.auug.org.au>
Date: Tue, 25 Aug 2020 20:03:26 +0800
Subject: [PATCH] blkcg: blk-iocost: predeclare used structs

mainline inclusion
from mainline-5.4-rc1
commit 8d1c1560c383004e09c6a39498094671cc664e6b
category: feature
bugzilla: 38688
CVE: NA

---------------------------

Fixes: 7caa47151ab2 ("blkcg: implement blk-iocost")
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Reviewed-by: Hou Tao <houtao1@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
---
 include/trace/events/iocost.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/trace/events/iocost.h b/include/trace/events/iocost.h
index d86ff25b8dc7..c2f580fd371b 100644
--- a/include/trace/events/iocost.h
+++ b/include/trace/events/iocost.h
@@ -2,6 +2,10 @@
 #undef TRACE_SYSTEM
 #define TRACE_SYSTEM iocost
 
+struct ioc;
+struct ioc_now;
+struct ioc_gq;
+
 #if !defined(_TRACE_BLK_IOCOST_H) || defined(TRACE_HEADER_MULTI_READ)
 #define _TRACE_BLK_IOCOST_H
 
-- 
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