pid namespaces: remove the struct pid unneeded fields
Pavel Emelyanov [Fri, 19 Oct 2007 06:40:17 +0000 (23:40 -0700)]
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>

include/linux/init_task.h
include/linux/pid.h
kernel/pid.c

index 243e287..5ac5945 100644 (file)
@@ -94,9 +94,6 @@ extern struct group_info init_groups;
 
 #define INIT_STRUCT_PID {                                              \
        .count          = ATOMIC_INIT(1),                               \
-       .nr             = 0,                                            \
-       /* Don't put this struct pid in pid_hash */                     \
-       .pid_chain      = { .next = NULL, .pprev = NULL },              \
        .tasks          = {                                             \
                { .first = &init_task.pids[PIDTYPE_PID].node },         \
                { .first = &init_task.pids[PIDTYPE_PGID].node },        \
index 16644cc..4817c66 100644 (file)
@@ -57,9 +57,6 @@ struct upid {
 struct pid
 {
        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 */
        struct hlist_head tasks[PIDTYPE_MAX];
        struct rcu_head rcu;
index 73a60e2..bed9e7f 100644 (file)
@@ -263,7 +263,6 @@ struct pid *alloc_pid(struct pid_namespace *ns)
 
        get_pid_ns(ns);
        pid->level = ns->level;
-       pid->nr = pid->numbers[0].nr;
        atomic_set(&pid->count, 1);
        for (type = 0; type < PIDTYPE_MAX; ++type)
                INIT_HLIST_HEAD(&pid->tasks[type]);