linux-kernel - [PATCH 11/12] pid: rewrite task helper functions avoiding task->pid and task->tgid

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Date:	Tue, 20 Aug 2013 17:32:03 -0400
From:	Richard Guy Briggs <rgb@...hat.com>
To:	linux-audit@...hat.com, linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org
Cc:	Richard Guy Briggs <rgb@...hat.com>,
	Eric Paris <eparis@...hat.com>,
	Al Viro <viro@...iv.linux.org.uk>,
	Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	"Serge E. Hallyn" <serge@...lyn.com>,
	John Johansen <john.johansen@...onical.com>,
	James Morris <james.l.morris@...cle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Kentaro Takeda <takedakn@...data.co.jp>,
	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 11/12] pid: rewrite task helper functions avoiding task->pid and task->tgid

This stops these four task helper functions from using the deprecated and
error-prone task->pid and task->tgid.

(informed by ebiederman's ea5a4d01)
Cc: "Eric W. Biederman" <ebiederm@...ssion.com>
Signed-off-by: Richard Guy Briggs <rgb@...hat.com>
---
 include/linux/sched.h |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 8e69807..46e739d 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1579,7 +1579,7 @@ static inline int pid_alive(struct task_struct *p)
  */
 static inline int is_global_init(struct task_struct *tsk)
 {
-	return tsk->pid == 1;
+	return task_pid_nr(tsk) == 1;
 }
 
 extern struct pid *cad_pid;
@@ -1930,7 +1930,7 @@ extern struct task_struct *idle_task(int cpu);
  */
 static inline bool is_idle_task(const struct task_struct *p)
 {
-	return p->pid == 0;
+	return task_pid(p) == &init_struct_pid;
 }
 extern struct task_struct *curr_task(int cpu);
 extern void set_curr_task(int cpu, struct task_struct *p);
@@ -2203,13 +2203,13 @@ static inline bool thread_group_leader(struct task_struct *p)
  */
 static inline int has_group_leader_pid(struct task_struct *p)
 {
-	return p->pid == p->tgid;
+	return task_pid(p) == task_tgid(p);
 }
 
 static inline
 int same_thread_group(struct task_struct *p1, struct task_struct *p2)
 {
-	return p1->tgid == p2->tgid;
+	return task_tgid(p1) == task_tgid(p2);
 }
 
 static inline struct task_struct *next_thread(const struct task_struct *p)
-- 
1.7.1

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