linux-kernel - [tip:irq/core] softirq: Use __this_cpu_write() in takeover

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Message-ID: <tip-8afecaa68df1e94a9d634f1f961533a925f239fc@git.kernel.org>
Date:   Sun, 23 Jun 2019 09:19:24 -0700
From:   tip-bot for Muchun Song <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     tglx@...utronix.de, mingo@...nel.org, linux-kernel@...r.kernel.org,
        smuchun@...il.com, hpa@...or.com
Subject: [tip:irq/core] softirq: Use __this_cpu_write() in
 takeover_tasklets()

Commit-ID:  8afecaa68df1e94a9d634f1f961533a925f239fc
Gitweb:     https://git.kernel.org/tip/8afecaa68df1e94a9d634f1f961533a925f239fc
Author:     Muchun Song <smuchun@...il.com>
AuthorDate: Tue, 18 Jun 2019 22:33:05 +0800
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Sun, 23 Jun 2019 18:14:27 +0200

softirq: Use __this_cpu_write() in takeover_tasklets()

The code is executed with interrupts disabled, so it's safe to use
__this_cpu_write().

[ tglx: Massaged changelog ]

Signed-off-by: Muchun Song <smuchun@...il.com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: joel@...lfernandes.org
Cc: rostedt@...dmis.org
Cc: frederic@...nel.org
Cc: paulmck@...ux.vnet.ibm.com
Cc: alexander.levin@...izon.com
Cc: peterz@...radead.org
Link: https://lkml.kernel.org/r/20190618143305.2038-1-smuchun@gmail.com

---
 kernel/softirq.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/softirq.c b/kernel/softirq.c
index 2c3382378d94..eaf3bdf7c749 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -650,7 +650,7 @@ static int takeover_tasklets(unsigned int cpu)
 	/* Find end, append list for that CPU. */
 	if (&per_cpu(tasklet_vec, cpu).head != per_cpu(tasklet_vec, cpu).tail) {
 		*__this_cpu_read(tasklet_vec.tail) = per_cpu(tasklet_vec, cpu).head;
-		this_cpu_write(tasklet_vec.tail, per_cpu(tasklet_vec, cpu).tail);
+		__this_cpu_write(tasklet_vec.tail, per_cpu(tasklet_vec, cpu).tail);
 		per_cpu(tasklet_vec, cpu).head = NULL;
 		per_cpu(tasklet_vec, cpu).tail = &per_cpu(tasklet_vec, cpu).head;
 	}