From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id ED23DC6369E for ; Sat, 14 Nov 2020 03:30:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9C89822250 for ; Sat, 14 Nov 2020 03:30:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726426AbgKND3r (ORCPT ); Fri, 13 Nov 2020 22:29:47 -0500 Received: from bhuna.collabora.co.uk ([46.235.227.227]:58522 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725981AbgKND3q (ORCPT ); Fri, 13 Nov 2020 22:29:46 -0500 Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: krisman) with ESMTPSA id F2D131F4798C From: Gabriel Krisman Bertazi To: tglx@linutronix.de Cc: mingo@redhat.com, keescook@chromium.org, arnd@arndb.de, luto@amacapital.net, wad@chromium.org, rostedt@goodmis.org, paul@paul-moore.com, eparis@redhat.com, oleg@redhat.com, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, x86@kernel.org, Gabriel Krisman Bertazi , kernel@collabora.com Subject: [PATCH 02/10] kernel: entry: Expose helpers to migrate TIF to SYSCALL_WORK flags Date: Fri, 13 Nov 2020 22:29:09 -0500 Message-Id: <20201114032917.1205658-3-krisman@collabora.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201114032917.1205658-1-krisman@collabora.com> References: <20201114032917.1205658-1-krisman@collabora.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org With the goal to split the syscall work related flags into a separate field that is architecture independent, expose transitional helpers that resolve to either the TIF flags or to the corresponding SYSCALL_WORK flags. This will allow architectures to migrate only when they port to the generic syscall entry code. Signed-off-by: Gabriel Krisman Bertazi --- include/linux/thread_info.h | 42 +++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) diff --git a/include/linux/thread_info.h b/include/linux/thread_info.h index e93e249a4e9b..18755373dc4d 100644 --- a/include/linux/thread_info.h +++ b/include/linux/thread_info.h @@ -97,6 +97,48 @@ static inline int test_ti_thread_flag(struct thread_info *ti, int flag) #define test_thread_flag(flag) \ test_ti_thread_flag(current_thread_info(), flag) +#ifdef CONFIG_GENERIC_ENTRY +static inline void __set_task_syscall_work(struct thread_info *ti, int flag) +{ + set_bit(flag, (unsigned long *)&ti->syscall_work); +} +static inline int __test_task_syscall_work(struct thread_info *ti, int flag) +{ + return test_bit(flag, (unsigned long *)&ti->syscall_work); +} +static inline void __clear_task_syscall_work(struct thread_info *ti, int flag) +{ + return clear_bit(flag, (unsigned long *)&ti->syscall_work); +} +#define set_syscall_work(fl) \ + __set_task_syscall_work(current_thread_info(), SYSCALL_WORK_##fl) +#define test_syscall_work(fl) \ + __test_task_syscall_work(current_thread_info(), SYSCALL_WORK_##fl) +#define clear_syscall_work(fl) \ + __clear_task_syscall_work(current_thread_info(), SYSCALL_WORK_##fl) + +#define set_task_syscall_work(t, fl) \ + __set_task_syscall_work(task_thread_info(t), SYSCALL_WORK_##fl) +#define test_task_syscall_work(t, fl) \ + __test_task_syscall_work(task_thread_info(t), SYSCALL_WORK_##fl) +#define clear_task_syscall_work(t, fl) \ + __clear_task_syscall_work(task_thread_info(t), SYSCALL_WORK_##fl) +#else +#define set_syscall_work(fl) \ + set_ti_thread_flag(current_thread_info(), SYSCALL_WORK_##fl) +#define test_syscall_work(fl) \ + test_ti_thread_flag(current_thread_info(), SYSCALL_WORK_##fl) +#define clear_syscall_work(fl) \ + clear_ti_thread_flag(current_thread_info(), SYSCALL_WORK_##fl) + +#define set_task_syscall_work(t, fl) \ + set_ti_thread_flag(task_thread_info(t), TIF_##fl) +#define test_task_syscall_work(t, fl) \ + test_ti_thread_flag(task_thread_info(t), TIF_##fl) +#define clear_task_syscall_work(t, fl) \ + clear_ti_thread_flag(task_thread_info(t), TIF_##fl) +#endif /* CONFIG_GENERIC_ENTRY */ + #define tif_need_resched() test_thread_flag(TIF_NEED_RESCHED) #ifndef CONFIG_HAVE_ARCH_WITHIN_STACK_FRAMES -- 2.29.2