linux-kernel - [PATCH] softirq: Replace this_cpu_write with __this_cpu

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Message-Id: <20190618143305.2038-1-smuchun@gmail.com>
Date:   Tue, 18 Jun 2019 22:33:05 +0800
From:   Muchun Song <smuchun@...il.com>
To:     joel@...lfernandes.org, tglx@...utronix.de, mingo@...nel.org,
        rostedt@...dmis.org, frederic@...nel.org,
        paulmck@...ux.vnet.ibm.com, alexander.levin@...izon.com,
        peterz@...radead.org
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH] softirq: Replace this_cpu_write with __this_cpu_write if irq is disabled

Irq is disabled before this_cpu_write(), so we can Replace this_cpu_write()
with __this_cpu_write().

Signed-off-by: Muchun Song <smuchun@...il.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;
 	}
-- 
2.17.1