From: Sukadev Bhattiprolu <sukadev@xxxxxxxxxx>
Subject: [RFC][PATCH 08/14] Remove unused nr field from struct pid
A process can have several pid_t values and these values are
represented by the pid->pid_nrs list. We no longer need the
'nr' field in struct pid.
Signed-off-by: Sukadev Bhattiprolu <sukadev@xxxxxxxxxx>
---
include/linux/init_task.h | 1 -
include/linux/pid.h | 1 -
kernel/pid.c | 1 -
3 files changed, 3 deletions(-)
Index: 2.6.21-rc3-mm2/include/linux/pid.h
===================================================================
--- 2.6.21-rc3-mm2.orig/include/linux/pid.h
+++ 2.6.21-rc3-mm2/include/linux/pid.h
@@ -62,7 +62,6 @@ struct pid_nr
struct pid
{
atomic_t count;
- int nr;
/* lists of tasks that use this pid */
struct hlist_head tasks[PIDTYPE_MAX];
struct rcu_head rcu;
Index: 2.6.21-rc3-mm2/include/linux/init_task.h
===================================================================
--- 2.6.21-rc3-mm2.orig/include/linux/init_task.h
+++ 2.6.21-rc3-mm2/include/linux/init_task.h
@@ -107,7 +107,6 @@ extern struct group_info init_groups;
#define INIT_STRUCT_PID { \
.count = ATOMIC_INIT(1), \
- .nr = 0, \
.tasks = { \
{ .first = &init_task.pids[PIDTYPE_PID].node }, \
{ .first = &init_task.pids[PIDTYPE_PGID].node }, \
Index: 2.6.21-rc3-mm2/kernel/pid.c
===================================================================
--- 2.6.21-rc3-mm2.orig/kernel/pid.c
+++ 2.6.21-rc3-mm2/kernel/pid.c
@@ -291,7 +291,6 @@ struct pid *alloc_pid(void)
if (!pid_nr)
goto out_free_pid;
- pid->nr = pid_nr->nr; /* pid->nr to be removed soon */
hlist_add_head(&pid_nr->node, &pid->pid_nrs);
return pid;
--
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