From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754120AbZK0XJ5 (ORCPT ); Fri, 27 Nov 2009 18:09:57 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754062AbZK0XJ1 (ORCPT ); Fri, 27 Nov 2009 18:09:27 -0500 Received: from server1.wserver.cz ([82.113.45.157]:60473 "EHLO server1.wserver.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753575AbZK0XGF (ORCPT ); Fri, 27 Nov 2009 18:06:05 -0500 From: Jiri Slaby To: jirislaby@gmail.com Cc: mingo@elte.hu, nhorman@tuxdriver.com, sfr@canb.auug.org.au, linux-kernel@vger.kernel.org, akpm@linux-foundation.org, marcin.slusarz@gmail.com, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, torvalds@linux-foundation.org, oleg@redhat.com, James Morris , Heiko Carstens Subject: [PATCH v3 14/27] resource: add helpers for fetching rlimits Date: Sat, 28 Nov 2009 00:05:54 +0100 Message-Id: <1259363167-9347-14-git-send-email-jslaby@suse.cz> X-Mailer: git-send-email 1.6.5.3 In-Reply-To: <1259363167-9347-1-git-send-email-jslaby@suse.cz> References: <1259363167-9347-1-git-send-email-jslaby@suse.cz> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org We want to be sure that compiler fetches the limit variable only once, so add helpers for fetching current and maximal resource limits which do that. Add them to sched.h (instead of resource.h) due to circular dependency sched.h->resource.h->task_struct Alternative would be to create a separate res_access.h or similar. Signed-off-by: Jiri Slaby Cc: James Morris Cc: Heiko Carstens Cc: Andrew Morton Cc: Ingo Molnar --- include/linux/sched.h | 22 ++++++++++++++++++++++ 1 files changed, 22 insertions(+), 0 deletions(-) diff --git a/include/linux/sched.h b/include/linux/sched.h index 75e6e60..cf4205b 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -2574,6 +2574,28 @@ static inline void mm_init_owner(struct mm_struct *mm, struct task_struct *p) } #endif /* CONFIG_MM_OWNER */ +static inline unsigned long task_rlim_get_cur(const struct task_struct *tsk, + unsigned int limit) +{ + return ACCESS_ONCE(tsk->signal->rlim[limit].rlim_cur); +} + +static inline unsigned long task_rlim_get_max(const struct task_struct *tsk, + unsigned int limit) +{ + return ACCESS_ONCE(tsk->signal->rlim[limit].rlim_max); +} + +static inline unsigned long rlim_get_cur(unsigned int limit) +{ + return task_rlim_get_cur(current, limit); +} + +static inline unsigned long rlim_get_max(unsigned int limit) +{ + return task_rlim_get_max(current, limit); +} + #define TASK_STATE_TO_CHAR_STR "RSDTtZX" #endif /* __KERNEL__ */ -- 1.6.5.3