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authorSukadev Bhattiprolu <sukadev@us.ibm.com>2007-05-10 22:22:58 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-11 08:29:35 -0700
commite713d0dab21a68500720e222fa02567fc7dfb14b (patch)
treea56f90ce94d9287b73da6db72ed0e73542a70a07 /kernel/fork.c
parent4ac24b3ba9016881b11646114bb5cd12cf23edd9 (diff)
downloadlinux-e713d0dab21a68500720e222fa02567fc7dfb14b.tar.bz2
attach_pid() with struct pid parameter
attach_pid() currently takes a pid_t and then uses find_pid() to find the corresponding struct pid. Sometimes we already have the struct pid. We can then skip find_pid() if attach_pid() were to take a struct pid parameter. Signed-off-by: Sukadev Bhattiprolu <sukadev@us.ibm.com> Cc: Cedric Le Goater <clg@fr.ibm.com> Cc: Dave Hansen <haveblue@us.ibm.com> Cc: Serge Hallyn <serue@us.ibm.com> Cc: <containers@lists.osdl.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/fork.c')
-rw-r--r--kernel/fork.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/kernel/fork.c b/kernel/fork.c
index da92e01aba6b..6031800c94cf 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1249,16 +1249,19 @@ static struct task_struct *copy_process(unsigned long clone_flags,
__ptrace_link(p, current->parent);
if (thread_group_leader(p)) {
+ pid_t pgid = process_group(current);
+ pid_t sid = process_session(current);
+
p->signal->tty = current->signal->tty;
- p->signal->pgrp = process_group(current);
+ p->signal->pgrp = pgid;
set_signal_session(p->signal, process_session(current));
- attach_pid(p, PIDTYPE_PGID, process_group(p));
- attach_pid(p, PIDTYPE_SID, process_session(p));
+ attach_pid(p, PIDTYPE_PGID, find_pid(pgid));
+ attach_pid(p, PIDTYPE_SID, find_pid(sid));
list_add_tail_rcu(&p->tasks, &init_task.tasks);
__get_cpu_var(process_counts)++;
}
- attach_pid(p, PIDTYPE_PID, p->pid);
+ attach_pid(p, PIDTYPE_PID, find_pid(p->pid));
nr_threads++;
}