linux-kernel - [PATCH -next 3/5] md: export md_is_rdwr() and is_md

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Message-Id: <20230512015610.821290-4-yukuai1@huaweicloud.com>
Date:   Fri, 12 May 2023 09:56:08 +0800
From:   Yu Kuai <yukuai1@...weicloud.com>
To:     logang@...tatee.com, reddunur@...ine.de, jovetoo@...il.com,
        dgilmour76@...il.com, song@...nel.org
Cc:     linux-raid@...r.kernel.org, linux-kernel@...r.kernel.org,
        yukuai3@...wei.com, yukuai1@...weicloud.com, yi.zhang@...wei.com,
        yangerkun@...wei.com
Subject: [PATCH -next 3/5] md: export md_is_rdwr() and is_md_suspended()

From: Yu Kuai <yukuai3@...wei.com>

The two apis will be used later to fix a deadlock in raid456, there are
no functional changes.

Signed-off-by: Yu Kuai <yukuai3@...wei.com>
---
 drivers/md/md.c | 16 ----------------
 drivers/md/md.h | 17 +++++++++++++++++
 2 files changed, 17 insertions(+), 16 deletions(-)

diff --git a/drivers/md/md.c b/drivers/md/md.c
index cf60d4b5356d..5db26b7e7314 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -90,18 +90,6 @@ static void mddev_detach(struct mddev *mddev);
 static void md_wakeup_thread_directly(struct md_thread __rcu *thread);
 static void export_rdev(struct md_rdev *rdev);
 
-enum md_ro_state {
-	MD_RDWR,
-	MD_RDONLY,
-	MD_AUTO_READ,
-	MD_MAX_STATE
-};
-
-static bool md_is_rdwr(struct mddev *mddev)
-{
-	return (mddev->ro == MD_RDWR);
-}
-
 /*
  * Default number of read corrections we'll attempt on an rdev
  * before ejecting it from the array. We divide the read error
@@ -377,10 +365,6 @@ EXPORT_SYMBOL_GPL(md_new_event);
 static LIST_HEAD(all_mddevs);
 static DEFINE_SPINLOCK(all_mddevs_lock);
 
-static bool is_md_suspended(struct mddev *mddev)
-{
-	return percpu_ref_is_dying(&mddev->active_io);
-}
 /* Rather than calling directly into the personality make_request function,
  * IO requests come here first so that we can check if the device is
  * being suspended pending a reconfiguration.
diff --git a/drivers/md/md.h b/drivers/md/md.h
index a228e78e7f3a..7827f27c1406 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -563,6 +563,23 @@ enum recovery_flags {
 	MD_RESYNCING_REMOTE,	/* remote node is running resync thread */
 };
 
+enum md_ro_state {
+	MD_RDWR,
+	MD_RDONLY,
+	MD_AUTO_READ,
+	MD_MAX_STATE
+};
+
+static inline bool md_is_rdwr(struct mddev *mddev)
+{
+	return (mddev->ro == MD_RDWR);
+}
+
+static inline bool is_md_suspended(struct mddev *mddev)
+{
+	return percpu_ref_is_dying(&mddev->active_io);
+}
+
 static inline int __must_check mddev_lock(struct mddev *mddev)
 {
 	return mutex_lock_interruptible(&mddev->reconfig_mutex);
-- 
2.39.2