From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751664AbeAaTku (ORCPT ); Wed, 31 Jan 2018 14:40:50 -0500 Received: from mail-lf0-f65.google.com ([209.85.215.65]:37056 "EHLO mail-lf0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751433AbeAaTks (ORCPT ); Wed, 31 Jan 2018 14:40:48 -0500 X-Google-Smtp-Source: AH8x227J7zKXAnlFmEGbx8DXbiBfpA7Bk3KWgyhKbMcAf99ZHcfwLspfWZxLILi23yAvdgjJyW8rcw== From: Ildar Ismagilov Cc: devix84@gmail.com, "Paul E. McKenney" , Josh Triplett , Steven Rostedt , Mathieu Desnoyers , Lai Jiangshan , linux-kernel@vger.kernel.org Subject: [PATCH 1/2] srcu: Prevent sdp->srcu_gp_seq_needed_exp counter wrap Date: Wed, 31 Jan 2018 22:39:53 +0300 Message-Id: <20180131193954.28386-1-devix84@gmail.com> X-Mailer: git-send-email 2.11.0 To: unlisted-recipients:; (no To-header on input) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Signed-off-by: Ildar Ismagilov --- kernel/rcu/srcutree.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kernel/rcu/srcutree.c b/kernel/rcu/srcutree.c index 1798d1aa60fa..c54617280245 100644 --- a/kernel/rcu/srcutree.c +++ b/kernel/rcu/srcutree.c @@ -552,6 +552,9 @@ static void srcu_gp_end(struct srcu_struct *sp) if (ULONG_CMP_GE(gpseq, sdp->srcu_gp_seq_needed + 100)) sdp->srcu_gp_seq_needed = gpseq; + if (ULONG_CMP_GE(gpseq, + sdp->srcu_gp_seq_needed_exp + 100)) + sdp->srcu_gp_seq_needed_exp = gpseq; raw_spin_unlock_irqrestore_rcu_node(sdp, flags); } } -- 2.11.0