From caafa4324335aeb11bc233d5f87aca8cce30beba Mon Sep 17 00:00:00 2001 From: Pavel Emelyanov Date: Wed, 30 Apr 2008 00:54:31 -0700 Subject: pidns: make pid->level and pid_ns->level unsigned These values represent the nesting level of a namespace and pids living in it, and it's always non-negative. Turning this from int to unsigned int saves some space in pid.c (11 bytes on x86 and 64 on ia64) by letting the compiler optimize the pid_nr_ns a bit. E.g. on ia64 this removes the sign extension calls, which compiler adds to optimize access to pid->nubers[ns->level]. Signed-off-by: Pavel Emelyanov Cc: "Eric W. Biederman" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/pid.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/linux/pid.h') diff --git a/include/linux/pid.h b/include/linux/pid.h index 8d199033c0ca..c21c7e8124a7 100644 --- a/include/linux/pid.h +++ b/include/linux/pid.h @@ -60,7 +60,7 @@ struct pid /* lists of tasks that use this pid */ struct hlist_head tasks[PIDTYPE_MAX]; struct rcu_head rcu; - int level; + unsigned int level; struct upid numbers[1]; }; -- cgit v1.2.3