linux-kernel - [PATCH 0/2] softirq: redefine the type of kernel

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Date:   Mon, 24 Jul 2023 21:22:22 +0800
From:   thunder.leizhen@...weicloud.com
To:     "Paul E . McKenney" <paulmck@...nel.org>,
        Frederic Weisbecker <frederic@...nel.org>,
        Neeraj Upadhyay <quic_neeraju@...cinc.com>,
        Joel Fernandes <joel@...lfernandes.org>,
        Josh Triplett <josh@...htriplett.org>,
        Boqun Feng <boqun.feng@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Lai Jiangshan <jiangshanlai@...il.com>,
        Zqiang <qiang.zhang1211@...il.com>, rcu@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Cc:     Zhen Lei <thunder.leizhen@...wei.com>
Subject: [PATCH 0/2] softirq: redefine the type of kernel_stat.softirqs[] as unsigned long

From: Zhen Lei <thunder.leizhen@...wei.com>

The type of member softirqs in structure kernel_stat is unsigned int, its
accumulated value can easily overflow. Changing to unsigned long can safely 
solve the problem on 64-bit processors.

 struct kernel_stat {
 	unsigned long irqs_sum;
-	unsigned int softirqs[NR_SOFTIRQS];
+	unsigned long softirqs[NR_SOFTIRQS];


Zhen Lei (2):
  softirq: fix integer overflow in function show_stat()
  softirq: redefine the type of kernel_stat.softirqs[] as unsigned long

 fs/proc/softirqs.c          | 2 +-
 fs/proc/stat.c              | 4 ++--
 include/linux/kernel_stat.h | 8 ++++----
 kernel/rcu/tree.h           | 2 +-
 kernel/rcu/tree_stall.h     | 6 +++---
 5 files changed, 11 insertions(+), 11 deletions(-)

-- 
2.25.1