linux-kernel - [PATCH 02/15] proc: export task_first_tid() and task_next

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Date:	Mon, 11 Apr 2016 16:35:42 -0700
From:	Andrey Vagin <avagin@...nvz.org>
To:	linux-kernel@...r.kernel.org
Cc:	Andrey Vagin <avagin@...nvz.org>, Oleg Nesterov <oleg@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Cyrill Gorcunov <gorcunov@...nvz.org>,
	Pavel Emelyanov <xemul@...allels.com>,
	Roger Luethi <rl@...lgate.ch>, Arnd Bergmann <arnd@...db.de>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	David Ahern <dsahern@...il.com>,
	Andy Lutomirski <luto@...capital.net>,
	Pavel Odintsov <pavel.odintsov@...il.com>
Subject: [PATCH 02/15] proc: export task_first_tid() and task_next_tid()

It will be more convenient when this function will be used in
task_diag.

Signed-off-by: Andrey Vagin <avagin@...nvz.org>
---
 fs/proc/base.c     | 8 ++++----
 fs/proc/internal.h | 4 ++++
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/fs/proc/base.c b/fs/proc/base.c
index b1755b2..614f1d0 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -3341,7 +3341,7 @@ out_no_task:
  * In the case of a seek we start with the leader and walk nr
  * threads past it.
  */
-static struct task_struct *first_tid(struct pid *pid, int tid, loff_t f_pos,
+struct task_struct *task_first_tid(struct pid *pid, int tid, loff_t f_pos,
 					struct pid_namespace *ns)
 {
 	struct task_struct *pos, *task;
@@ -3390,7 +3390,7 @@ out:
  *
  * The reference to the input task_struct is released.
  */
-static struct task_struct *next_tid(struct task_struct *start)
+struct task_struct *task_next_tid(struct task_struct *start)
 {
 	struct task_struct *pos = NULL;
 	rcu_read_lock();
@@ -3426,9 +3426,9 @@ static int proc_task_readdir(struct file *file, struct dir_context *ctx)
 	ns = inode->i_sb->s_fs_info;
 	tid = (int)file->f_version;
 	file->f_version = 0;
-	for (task = first_tid(proc_pid(inode), tid, ctx->pos - 2, ns);
+	for (task = task_first_tid(proc_pid(inode), tid, ctx->pos - 2, ns);
 	     task;
-	     task = next_tid(task), ctx->pos++) {
+	     task = task_next_tid(task), ctx->pos++) {
 		char name[PROC_NUMBUF];
 		int len;
 		tid = task_pid_nr_ns(task, ns);
diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index 969e05b..49145e2 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -306,3 +306,7 @@ extern void task_mem(struct seq_file *, struct mm_struct *);
 
 struct task_struct *
 task_next_child(struct task_struct *parent, struct task_struct *prev, unsigned int pos);
+
+struct task_struct *task_first_tid(struct pid *pid, int tid, loff_t f_pos,
+					struct pid_namespace *ns);
+struct task_struct *task_next_tid(struct task_struct *start);
-- 
2.5.5