From: Pavel Emelyanov <xemul@openvz.org>
Date: Wed, 30 Apr 2008 07:54:31 +0000 (-0700)
Subject: pidns: make pid->level and pid_ns->level unsigned
X-Git-Tag: v2.6.26-rc1~159
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=caafa4324335aeb11bc233d5f87aca8cce30beba;p=pandora-kernel.git

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>
---

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