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authorPavel Emelyanov <xemul@openvz.org>2008-04-30 00:54:31 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-30 08:29:49 -0700
commitcaafa4324335aeb11bc233d5f87aca8cce30beba (patch)
treeb6371b0c084ffb91f7304a7e392b28ccfdab8a2e /kernel/pid_namespace.c
parentab883af53ec1b87add43b32a28d8347f17d5155b (diff)
downloadvexpress-lsk-caafa4324335aeb11bc233d5f87aca8cce30beba.tar.gz
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 <xemul@openvz.org> 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>
Diffstat (limited to 'kernel/pid_namespace.c')
-rw-r--r--kernel/pid_namespace.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c
index 5ca37fa50be..98702b4b885 100644
--- a/kernel/pid_namespace.c
+++ b/kernel/pid_namespace.c
@@ -66,7 +66,7 @@ err_alloc:
return NULL;
}
-static struct pid_namespace *create_pid_namespace(int level)
+static struct pid_namespace *create_pid_namespace(unsigned int level)
{
struct pid_namespace *ns;
int i;