From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e28smtp08.in.ibm.com (e28smtp08.in.ibm.com [122.248.162.8]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "e28smtp08.in.ibm.com", Issuer "GeoTrust SSL CA" (not verified)) by ozlabs.org (Postfix) with ESMTPS id B01D42C032F for ; Fri, 1 Feb 2013 21:28:05 +1100 (EST) Received: from /spool/local by e28smtp08.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 1 Feb 2013 15:55:27 +0530 Received: from d28relay05.in.ibm.com (d28relay05.in.ibm.com [9.184.220.62]) by d28dlp03.in.ibm.com (Postfix) with ESMTP id A54DA1258052 for ; Fri, 1 Feb 2013 15:58:31 +0530 (IST) Received: from d28av03.in.ibm.com (d28av03.in.ibm.com [9.184.220.65]) by d28relay05.in.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id r11ARwpH19136594 for ; Fri, 1 Feb 2013 15:57:58 +0530 Received: from d28av03.in.ibm.com (loopback [127.0.0.1]) by d28av03.in.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id r11ARxGk022574 for ; Fri, 1 Feb 2013 21:27:59 +1100 From: Li Zhong To: linux-kernel@vger.kernel.org Subject: [RFC PATCH 3/5] powerpc: Exit user context on notify resume Date: Fri, 1 Feb 2013 18:27:43 +0800 Message-Id: <1359714465-6297-4-git-send-email-zhong@linux.vnet.ibm.com> In-Reply-To: <1359714465-6297-1-git-send-email-zhong@linux.vnet.ibm.com> References: <1359714465-6297-1-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 3b99711..c1eaea2 100644 --- a/arch/powerpc/kernel/signal.c +++ b/arch/powerpc/kernel/signal.c @@ -13,6 +13,7 @@ #include #include #include +#include #include #include #include @@ -158,6 +159,8 @@ 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); @@ -168,6 +171,8 @@ 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(); } long sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss, -- 1.7.9.5