From 417e315247ebc199d357855bb08d2a5264400565 Mon Sep 17 00:00:00 2001 From: André Goddard Rosa Date: Tue, 15 Dec 2009 16:47:40 -0800 Subject: pid: reduce code size by using a pointer to iterate over array MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit It decreases code size by 16 bytes on my gcc 4.4.1 on Core 2: text data bss dec hex filename 4314 2216 8 6538 198a kernel/pid.o-BEFORE 4298 2216 8 6522 197a kernel/pid.o-AFTER Signed-off-by: André Goddard Rosa Cc: Pekka Enberg Cc: Oleg Nesterov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- kernel/pid.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) (limited to 'kernel/pid.c') diff --git a/kernel/pid.c b/kernel/pid.c index 55fd5900bac..2e17c9c92cb 100644 --- a/kernel/pid.c +++ b/kernel/pid.c @@ -269,12 +269,11 @@ struct pid *alloc_pid(struct pid_namespace *ns) for (type = 0; type < PIDTYPE_MAX; ++type) INIT_HLIST_HEAD(&pid->tasks[type]); + upid = pid->numbers + ns->level; spin_lock_irq(&pidmap_lock); - for (i = ns->level; i >= 0; i--) { - upid = &pid->numbers[i]; + for ( ; upid >= pid->numbers; --upid) hlist_add_head_rcu(&upid->pid_chain, &pid_hash[pid_hashfn(upid->nr, upid->ns)]); - } spin_unlock_irq(&pidmap_lock); out: -- cgit v1.2.3-18-g5258