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pid namespaces: remove the struct pid unneeded fields 

Since we've switched from using pid->nr to pid->upids->nr some
fields on struct pid are no longer needed

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Sukadev Bhattiprolu <sukadev@us.ibm.com>
Cc: Paul Menage <menage@google.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Pavel Emelyanov 2007-10-18 23:40:17 -07:00 committed by Linus Torvalds
parent 228ebcbe63
commit 19b9b9b54e
3 changed files with 0 additions and 7 deletions
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3
include/linux/init_task.h
View File

@ -94,9 +94,6 @@ extern struct group_info init_groups;
#define INIT_STRUCT_PID { \ #define INIT_STRUCT_PID { \
.count = ATOMIC_INIT(1), \ .count = ATOMIC_INIT(1), \
.nr = 0, \
/* Don't put this struct pid in pid_hash */ \
.pid_chain = { .next = NULL, .pprev = NULL }, \
.tasks = { \ .tasks = { \
{ .first = &init_task.pids[PIDTYPE_PID].node }, \ { .first = &init_task.pids[PIDTYPE_PID].node }, \
{ .first = &init_task.pids[PIDTYPE_PGID].node }, \ { .first = &init_task.pids[PIDTYPE_PGID].node }, \

3
include/linux/pid.h
View File

@ -57,9 +57,6 @@ struct upid {
struct pid struct pid
{ {
atomic_t count; atomic_t count;
/* Try to keep pid_chain in the same cacheline as nr for find_pid */
int nr;
struct hlist_node pid_chain;
/* lists of tasks that use this pid */ /* lists of tasks that use this pid */
struct hlist_head tasks[PIDTYPE_MAX]; struct hlist_head tasks[PIDTYPE_MAX];
struct rcu_head rcu; struct rcu_head rcu;

1
kernel/pid.c
View File

@ -263,7 +263,6 @@ struct pid *alloc_pid(struct pid_namespace *ns)
get_pid_ns(ns); get_pid_ns(ns);
pid->level = ns->level; pid->level = ns->level;
pid->nr = pid->numbers[0].nr;
atomic_set(&pid->count, 1); atomic_set(&pid->count, 1);
for (type = 0; type < PIDTYPE_MAX; ++type) for (type = 0; type < PIDTYPE_MAX; ++type)
INIT_HLIST_HEAD(&pid->tasks[type]); INIT_HLIST_HEAD(&pid->tasks[type]);