From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757232AbbFPURb (ORCPT ); Tue, 16 Jun 2015 16:17:31 -0400 Received: from mail.kernel.org ([198.145.29.136]:42482 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754847AbbFPURI (ORCPT ); Tue, 16 Jun 2015 16:17:08 -0400 From: Andy Lutomirski To: x86@kernel.org, linux-kernel@vger.kernel.org Cc: =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20Weisbecker?= , Rik van Riel , Oleg Nesterov , Denys Vlasenko , Borislav Petkov , Kees Cook , Brian Gerst , Andy Lutomirski Subject: [RFC/INCOMPLETE 01/13] context_tracking: Add context_tracking_assert_state Date: Tue, 16 Jun 2015 13:16:47 -0700 Message-Id: <1d95640676a92a5ff7382e9c87517c12ea23ccd9.1434485184.git.luto@kernel.org> X-Mailer: git-send-email 2.4.3 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This will let us sprinkle sanity checks around the kernel without making too much of a mess. Signed-off-by: Andy Lutomirski --- include/linux/context_tracking.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/include/linux/context_tracking.h b/include/linux/context_tracking.h index 2821838256b4..0fbea4b152e1 100644 --- a/include/linux/context_tracking.h +++ b/include/linux/context_tracking.h @@ -57,6 +57,13 @@ static inline void context_tracking_task_switch(struct task_struct *prev, if (context_tracking_is_enabled()) __context_tracking_task_switch(prev, next); } + +static inline void context_tracking_assert_state(enum ctx_state state) +{ + rcu_lockdep_assert(!context_tracking_is_enabled() || + this_cpu_read(context_tracking.state) == state, + "context tracking state was wrong"); +} #else static inline void user_enter(void) { } static inline void user_exit(void) { } @@ -64,6 +71,7 @@ static inline enum ctx_state exception_enter(void) { return 0; } static inline void exception_exit(enum ctx_state prev_ctx) { } static inline void context_tracking_task_switch(struct task_struct *prev, struct task_struct *next) { } +static inline void context_tracking_assert_state(enum ctx_state state) { } #endif /* !CONFIG_CONTEXT_TRACKING */ -- 2.4.3