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Message-ID: <20070111130235.GA15353@us.ibm.com>
Date: Thu, 11 Jan 2007 05:02:35 -0800
From: Sukadev Bhattiprolu <sukadev@...ibm.com>
To: Andrew Morton <akpm@...l.org>
Cc: linux-kernel@...r.kernel.org,
Containers <containers@...ts.osdl.org>, clg@...ibm.com,
"David C. Hansen" <haveblue@...ibm.com>, serue@...ibm.com,
sukadev@...ibm.com
Subject: [PATCH] Rename attach_pid() to find_attach_pid()
From: Sukadev Bhattiprolu <sukadev@...ibm.com>
attach_pid() currently takes a pid_t parameter and uses find_pid() to find
the struct pid associated with the pid_t. With containers, we sometimes
already have the struct pid and could skip the find_pid() - if we have a
version of attach_pid() that takes a struct pid parameter.
This patch renames the attach_pid() to find_attach_pid(). My next patch
defines attach_pid() to take a struct pid.
Signed-off-by: Sukadev Bhattiprolu <sukadev@...ibm.com>
Cc: Cedric Le Goater <clg@...ibm.com>
Cc: Dave Hansen <haveblue@...ibm.com>
Cc: Serge Hallyn <serue@...ibm.com>
Cc: containers@...ts.osdl.org
---
fs/exec.c | 2 +-
include/linux/pid.h | 4 ++--
kernel/exit.c | 4 ++--
kernel/fork.c | 6 +++---
kernel/pid.c | 3 ++-
kernel/sys.c | 2 +-
6 files changed, 11 insertions(+), 10 deletions(-)
Index: lx26-20-rc2-mm1/fs/exec.c
===================================================================
--- lx26-20-rc2-mm1.orig/fs/exec.c 2007-01-10 14:16:17.000000000 -0800
+++ lx26-20-rc2-mm1/fs/exec.c 2007-01-10 21:42:43.000000000 -0800
@@ -701,7 +701,7 @@ static int de_thread(struct task_struct
*/
detach_pid(tsk, PIDTYPE_PID);
tsk->pid = leader->pid;
- attach_pid(tsk, PIDTYPE_PID, tsk->pid);
+ find_attach_pid(tsk, PIDTYPE_PID, tsk->pid);
transfer_pid(leader, tsk, PIDTYPE_PGID);
transfer_pid(leader, tsk, PIDTYPE_SID);
list_replace_rcu(&leader->tasks, &tsk->tasks);
Index: lx26-20-rc2-mm1/include/linux/pid.h
===================================================================
--- lx26-20-rc2-mm1.orig/include/linux/pid.h 2007-01-10 14:16:18.000000000 -0800
+++ lx26-20-rc2-mm1/include/linux/pid.h 2007-01-11 04:44:06.674046656 -0800
@@ -72,10 +72,10 @@ extern struct task_struct *FASTCALL(get_
extern struct pid *get_task_pid(struct task_struct *task, enum pid_type type);
/*
- * attach_pid() and detach_pid() must be called with the tasklist_lock
+ * find_attach_pid() and detach_pid() must be called with the tasklist_lock
* write-held.
*/
-extern int FASTCALL(attach_pid(struct task_struct *task,
+extern int FASTCALL(find_attach_pid(struct task_struct *task,
enum pid_type type, int nr));
extern void FASTCALL(detach_pid(struct task_struct *task, enum pid_type));
Index: lx26-20-rc2-mm1/kernel/exit.c
===================================================================
--- lx26-20-rc2-mm1.orig/kernel/exit.c 2007-01-10 14:16:18.000000000 -0800
+++ lx26-20-rc2-mm1/kernel/exit.c 2007-01-10 21:43:09.000000000 -0800
@@ -301,12 +301,12 @@ void __set_special_pids(pid_t session, p
if (process_session(curr) != session) {
detach_pid(curr, PIDTYPE_SID);
set_signal_session(curr->signal, session);
- attach_pid(curr, PIDTYPE_SID, session);
+ find_attach_pid(curr, PIDTYPE_SID, session);
}
if (process_group(curr) != pgrp) {
detach_pid(curr, PIDTYPE_PGID);
curr->signal->pgrp = pgrp;
- attach_pid(curr, PIDTYPE_PGID, pgrp);
+ find_attach_pid(curr, PIDTYPE_PGID, pgrp);
}
}
Index: lx26-20-rc2-mm1/kernel/fork.c
===================================================================
--- lx26-20-rc2-mm1.orig/kernel/fork.c 2007-01-10 14:16:18.000000000 -0800
+++ lx26-20-rc2-mm1/kernel/fork.c 2007-01-11 04:43:33.602074360 -0800
@@ -1248,13 +1248,13 @@ static struct task_struct *copy_process(
p->signal->tty = current->signal->tty;
p->signal->pgrp = process_group(current);
set_signal_session(p->signal, process_session(current));
- attach_pid(p, PIDTYPE_PGID, process_group(p));
- attach_pid(p, PIDTYPE_SID, process_session(p));
+ find_attach_pid(p, PIDTYPE_PGID, process_group(p));
+ find_attach_pid(p, PIDTYPE_SID, process_session(p));
list_add_tail_rcu(&p->tasks, &init_task.tasks);
__get_cpu_var(process_counts)++;
}
- attach_pid(p, PIDTYPE_PID, p->pid);
+ find_attach_pid(p, PIDTYPE_PID, p->pid);
nr_threads++;
}
Index: lx26-20-rc2-mm1/kernel/pid.c
===================================================================
--- lx26-20-rc2-mm1.orig/kernel/pid.c 2007-01-10 14:15:49.000000000 -0800
+++ lx26-20-rc2-mm1/kernel/pid.c 2007-01-11 04:44:06.674046656 -0800
@@ -247,7 +247,8 @@ struct pid * fastcall find_pid(int nr)
}
EXPORT_SYMBOL_GPL(find_pid);
-int fastcall attach_pid(struct task_struct *task, enum pid_type type, int nr)
+int fastcall find_attach_pid(struct task_struct *task, enum pid_type type,
+ int nr)
{
struct pid_link *link;
struct pid *pid;
Index: lx26-20-rc2-mm1/kernel/sys.c
===================================================================
--- lx26-20-rc2-mm1.orig/kernel/sys.c 2007-01-10 14:16:18.000000000 -0800
+++ lx26-20-rc2-mm1/kernel/sys.c 2007-01-10 21:45:01.000000000 -0800
@@ -1480,7 +1480,7 @@ asmlinkage long sys_setpgid(pid_t pid, p
if (process_group(p) != pgid) {
detach_pid(p, PIDTYPE_PGID);
p->signal->pgrp = pgid;
- attach_pid(p, PIDTYPE_PGID, pgid);
+ find_attach_pid(p, PIDTYPE_PGID, pgid);
}
err = 0;
-
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