From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e23smtp01.au.ibm.com (e23smtp01.au.ibm.com [202.81.31.143]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "e23smtp01.au.ibm.com", Issuer "GeoTrust SSL CA" (not verified)) by ozlabs.org (Postfix) with ESMTPS id 17F1F2C00EB for ; Mon, 13 May 2013 15:22:03 +1000 (EST) Received: from /spool/local by e23smtp01.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 13 May 2013 15:14:16 +1000 Received: from d23relay05.au.ibm.com (d23relay05.au.ibm.com [9.190.235.152]) by d23dlp01.au.ibm.com (Postfix) with ESMTP id AB0E22CE804A for ; Mon, 13 May 2013 15:21:58 +1000 (EST) Received: from d23av02.au.ibm.com (d23av02.au.ibm.com [9.190.235.138]) by d23relay05.au.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id r4D57qji4325544 for ; Mon, 13 May 2013 15:07:52 +1000 Received: from d23av02.au.ibm.com (loopback [127.0.0.1]) by d23av02.au.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id r4D5Lvrs013881 for ; Mon, 13 May 2013 15:21:57 +1000 From: Li Zhong To: linux-kernel@vger.kernel.org Subject: [RFC PATCH v3 3/5] powerpc: Exit user context on notify resume Date: Mon, 13 May 2013 13:21:31 +0800 Message-Id: <1368422493-9831-4-git-send-email-zhong@linux.vnet.ibm.com> In-Reply-To: <1368422493-9831-1-git-send-email-zhong@linux.vnet.ibm.com> References: <1368422493-9831-1-git-send-email-zhong@linux.vnet.ibm.com> Cc: Li Zhong , fweisbec@gmail.com, paulus@samba.org, paulmck@linux.vnet.ibm.com, linuxppc-dev@lists.ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , This patch allows RCU usage in do_notify_resume, e.g. signal handling. It corresponds to [PATCH] x86: Exit RCU extended QS on notify resume commit edf55fda35c7dc7f2d9241c3abaddaf759b457c6 Signed-off-by: Li Zhong --- arch/powerpc/kernel/signal.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/powerpc/kernel/signal.c b/arch/powerpc/kernel/signal.c index cf12eae..d63b502 100644 --- a/arch/powerpc/kernel/signal.c +++ b/arch/powerpc/kernel/signal.c @@ -13,6 +13,7 @@ #include #include #include +#include #include #include #include @@ -159,6 +160,8 @@ static int do_signal(struct pt_regs *regs) void do_notify_resume(struct pt_regs *regs, unsigned long thread_info_flags) { + user_exit(); + if (thread_info_flags & _TIF_UPROBE) uprobe_notify_resume(regs); @@ -169,4 +172,6 @@ void do_notify_resume(struct pt_regs *regs, unsigned long thread_info_flags) clear_thread_flag(TIF_NOTIFY_RESUME); tracehook_notify_resume(regs); } + + user_enter(); } -- 1.7.9.5