linux-kernel - [PATCH 1/7] kthreads: minor kthreadd refactoring

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Message-Id: <1549656647-25115-2-git-send-email-bfields@redhat.com>
Date:   Fri,  8 Feb 2019 15:10:41 -0500
From:   "J. Bruce Fields" <bfields@...hat.com>
To:     linux-nfs@...r.kernel.org
Cc:     linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        Trond Myklebust <trondmy@...merspace.com>,
        Jeff Layton <jlayton@...hat.com>,
        David Howells <dhowells@...hat.com>, Tejun Heo <tj@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Shaohua Li <shli@...com>, Oleg Nesterov <oleg@...hat.com>,
        "J. Bruce Fields" <bfields@...hat.com>
Subject: [PATCH 1/7] kthreads: minor kthreadd refactoring

From: "J. Bruce Fields" <bfields@...hat.com>

Trivial refactoring, no change in behavior.

Not really necessary, a separate function for the inner loop just seems
a little nicer to me.

Signed-off-by: J. Bruce Fields <bfields@...hat.com>
---
 kernel/kthread.c | 33 +++++++++++++++++++--------------
 1 file changed, 19 insertions(+), 14 deletions(-)

diff --git a/kernel/kthread.c b/kernel/kthread.c
index 087d18d771b5..672f0bbf4d89 100644
--- a/kernel/kthread.c
+++ b/kernel/kthread.c
@@ -556,6 +556,24 @@ int kthread_stop(struct task_struct *k)
 }
 EXPORT_SYMBOL(kthread_stop);
 
+void kthread_do_work(void)
+{
+	spin_lock(&kthread_create_lock);
+	while (!list_empty(&kthread_create_list)) {
+		struct kthread_create_info *create;
+
+		create = list_entry(kthread_create_list.next,
+				    struct kthread_create_info, list);
+		list_del_init(&create->list);
+		spin_unlock(&kthread_create_lock);
+
+		create_kthread(create);
+
+		spin_lock(&kthread_create_lock);
+	}
+	spin_unlock(&kthread_create_lock);
+}
+
 int kthreadd(void *unused)
 {
 	struct task_struct *tsk = current;
@@ -575,20 +593,7 @@ int kthreadd(void *unused)
 			schedule();
 		__set_current_state(TASK_RUNNING);
 
-		spin_lock(&kthread_create_lock);
-		while (!list_empty(&kthread_create_list)) {
-			struct kthread_create_info *create;
-
-			create = list_entry(kthread_create_list.next,
-					    struct kthread_create_info, list);
-			list_del_init(&create->list);
-			spin_unlock(&kthread_create_lock);
-
-			create_kthread(create);
-
-			spin_lock(&kthread_create_lock);
-		}
-		spin_unlock(&kthread_create_lock);
+		kthread_do_work();
 	}
 
 	return 0;
-- 
2.20.1