linux-kernel - [PATCH] cgroup/cpuset: Clean up cpuset_task_status

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Message-Id: <20221125075133.12718-1-haifeng.xu@shopee.com>
Date:   Fri, 25 Nov 2022 07:51:33 +0000
From:   "haifeng.xu" <haifeng.xu@...pee.com>
To:     longman@...hat.com
Cc:     lizefan.x@...edance.com, tj@...nel.org, hannes@...xchg.org,
        cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
        "haifeng.xu" <haifeng.xu@...pee.com>
Subject: [PATCH] cgroup/cpuset: Clean up cpuset_task_status_allowed

cpuset_task_status_allowed just shows mems_allowed status, so
rename it to task_mems_allowed. Moreover, it's only used in
proc_pid_status, so move it to fs/proc/array.c. There is no
intentional function change.

Signed-off-by: haifeng.xu <haifeng.xu@...pee.com>
---
 fs/proc/array.c        | 13 +++++++++++--
 include/linux/cpuset.h |  7 -------
 kernel/cgroup/cpuset.c |  9 ---------
 3 files changed, 11 insertions(+), 18 deletions(-)

diff --git a/fs/proc/array.c b/fs/proc/array.c
index 49283b8103c7..e6cdef8387e6 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -80,7 +80,6 @@
 #include <linux/file.h>
 #include <linux/fdtable.h>
 #include <linux/times.h>
-#include <linux/cpuset.h>
 #include <linux/rcupdate.h>
 #include <linux/delayacct.h>
 #include <linux/seq_file.h>
@@ -413,6 +412,16 @@ static void task_cpus_allowed(struct seq_file *m, struct task_struct *task)
 		   cpumask_pr_args(&task->cpus_mask));
 }
 
+static void task_mems_allowed(struct seq_file *m, struct task_struct *task)
+{
+#ifdef CONFIG_CPUSETS
+	seq_printf(m, "Mems_allowed:\t%*pb\n",
+		   nodemask_pr_args(&task->mems_allowed));
+	seq_printf(m, "Mems_allowed_list:\t%*pbl\n",
+		   nodemask_pr_args(&task->mems_allowed));
+#endif
+}
+
 static inline void task_core_dumping(struct seq_file *m, struct task_struct *task)
 {
 	seq_put_decimal_ull(m, "CoreDumping:\t", !!task->signal->core_state);
@@ -449,7 +458,7 @@ int proc_pid_status(struct seq_file *m, struct pid_namespace *ns,
 	task_cap(m, task);
 	task_seccomp(m, task);
 	task_cpus_allowed(m, task);
-	cpuset_task_status_allowed(m, task);
+	task_mems_allowed(m, task);
 	task_context_switch_counts(m, task);
 	return 0;
 }
diff --git a/include/linux/cpuset.h b/include/linux/cpuset.h
index d58e0476ee8e..30b91116dd2f 100644
--- a/include/linux/cpuset.h
+++ b/include/linux/cpuset.h
@@ -112,8 +112,6 @@ extern int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
 extern int cpuset_memory_pressure_enabled;
 extern void __cpuset_memory_pressure_bump(void);
 
-extern void cpuset_task_status_allowed(struct seq_file *m,
-					struct task_struct *task);
 extern int proc_cpuset_show(struct seq_file *m, struct pid_namespace *ns,
 			    struct pid *pid, struct task_struct *tsk);
 
@@ -246,11 +244,6 @@ static inline int cpuset_mems_allowed_intersects(const struct task_struct *tsk1,
 
 static inline void cpuset_memory_pressure_bump(void) {}
 
-static inline void cpuset_task_status_allowed(struct seq_file *m,
-						struct task_struct *task)
-{
-}
-
 static inline int cpuset_mem_spread_node(void)
 {
 	return 0;
diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index 589827ccda8b..5798d4231662 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -4045,12 +4045,3 @@ int proc_cpuset_show(struct seq_file *m, struct pid_namespace *ns,
 	return retval;
 }
 #endif /* CONFIG_PROC_PID_CPUSET */
-
-/* Display task mems_allowed in /proc/<pid>/status file. */
-void cpuset_task_status_allowed(struct seq_file *m, struct task_struct *task)
-{
-	seq_printf(m, "Mems_allowed:\t%*pb\n",
-		   nodemask_pr_args(&task->mems_allowed));
-	seq_printf(m, "Mems_allowed_list:\t%*pbl\n",
-		   nodemask_pr_args(&task->mems_allowed));
-}
-- 
2.25.1