linux-kernel - [PATCH -next] cgroup/cpuset: Remove cpuset_slab_spread

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Message-ID: <20240713085916.3373085-1-xiujianfeng@huawei.com>
Date: Sat, 13 Jul 2024 08:59:16 +0000
From: Xiu Jianfeng <xiujianfeng@...wei.com>
To: <longman@...hat.com>, <lizefan.x@...edance.com>, <mingo@...hat.com>,
	<peterz@...radead.org>, <juri.lelli@...hat.com>,
	<vincent.guittot@...aro.org>, <tj@...nel.org>, <hannes@...xchg.org>,
	<mkoutny@...e.com>
CC: <cgroups@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH -next] cgroup/cpuset: Remove cpuset_slab_spread_rotor

Since the SLAB implementation was removed in v6.8, so the
cpuset_slab_spread_rotor is no longer used and can be removed.

Signed-off-by: Xiu Jianfeng <xiujianfeng@...wei.com>
---
 include/linux/cpuset.h |  6 ------
 include/linux/sched.h  |  1 -
 kernel/cgroup/cpuset.c | 13 -------------
 kernel/fork.c          |  1 -
 4 files changed, 21 deletions(-)

diff --git a/include/linux/cpuset.h b/include/linux/cpuset.h
index de4cf0ee96f7..2a6981eeebf8 100644
--- a/include/linux/cpuset.h
+++ b/include/linux/cpuset.h
@@ -113,7 +113,6 @@ extern int proc_cpuset_show(struct seq_file *m, struct pid_namespace *ns,
 			    struct pid *pid, struct task_struct *tsk);
 
 extern int cpuset_mem_spread_node(void);
-extern int cpuset_slab_spread_node(void);
 
 static inline int cpuset_do_page_mem_spread(void)
 {
@@ -246,11 +245,6 @@ static inline int cpuset_mem_spread_node(void)
 	return 0;
 }
 
-static inline int cpuset_slab_spread_node(void)
-{
-	return 0;
-}
-
 static inline int cpuset_do_page_mem_spread(void)
 {
 	return 0;
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 75138bf70da3..e151da1675fe 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1248,7 +1248,6 @@ struct task_struct {
 	/* Sequence number to catch updates: */
 	seqcount_spinlock_t		mems_allowed_seq;
 	int				cpuset_mem_spread_rotor;
-	int				cpuset_slab_spread_rotor;
 #endif
 #ifdef CONFIG_CGROUPS
 	/* Control Group info protected by css_set_lock: */
diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index 40ec4abaf440..ba7f7f967565 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -5028,19 +5028,6 @@ int cpuset_mem_spread_node(void)
 	return cpuset_spread_node(&current->cpuset_mem_spread_rotor);
 }
 
-/**
- * cpuset_slab_spread_node() - On which node to begin search for a slab page
- */
-int cpuset_slab_spread_node(void)
-{
-	if (current->cpuset_slab_spread_rotor == NUMA_NO_NODE)
-		current->cpuset_slab_spread_rotor =
-			node_random(&current->mems_allowed);
-
-	return cpuset_spread_node(&current->cpuset_slab_spread_rotor);
-}
-EXPORT_SYMBOL_GPL(cpuset_mem_spread_node);
-
 /**
  * cpuset_mems_allowed_intersects - Does @tsk1's mems_allowed intersect @tsk2's?
  * @tsk1: pointer to task_struct of some task.
diff --git a/kernel/fork.c b/kernel/fork.c
index 08e13b919d80..559e8df1672a 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -2313,7 +2313,6 @@ __latent_entropy struct task_struct *copy_process(
 #endif
 #ifdef CONFIG_CPUSETS
 	p->cpuset_mem_spread_rotor = NUMA_NO_NODE;
-	p->cpuset_slab_spread_rotor = NUMA_NO_NODE;
 	seqcount_spinlock_init(&p->mems_allowed_seq, &p->alloc_lock);
 #endif
 #ifdef CONFIG_TRACE_IRQFLAGS
-- 
2.34.1