linux-kernel - [PATCH 2/2] smp: remove 'priv' of call_single

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Date:	Mon, 22 Apr 2013 13:47:23 +0800
From:	liguang <lig.fnst@...fujitsu.com>
To:	tglx@...utronix.de, peterz@...radead.org,
	akpm@...ux-foundation.org, shli@...ionio.com,
	srivatsa.bhat@...ux.vnet.ibm.com, suresh.b.siddha@...el.com,
	fweisbec@...il.com, sedat.dilek@...il.com,
	paulmck@...ux.vnet.ibm.com, linux-kernel@...r.kernel.org
Cc:	liguang <lig.fnst@...fujitsu.com>
Subject: [PATCH 2/2] smp: remove 'priv' of call_single_data

the 'priv' field seems a little redundant,
because we can pass data via 'info'.

Signed-off-by: liguang <lig.fnst@...fujitsu.com>
---
 include/linux/smp.h |    1 -
 kernel/softirq.c    |    6 ++----
 2 files changed, 2 insertions(+), 5 deletions(-)

diff --git a/include/linux/smp.h b/include/linux/smp.h
index 3e07a7d..e6564c1 100644
--- a/include/linux/smp.h
+++ b/include/linux/smp.h
@@ -20,7 +20,6 @@ struct call_single_data {
 	smp_call_func_t func;
 	void *info;
 	u16 flags;
-	u16 priv;
 };
 
 /* total number of cpus in this system (may exceed NR_CPUS) */
diff --git a/kernel/softirq.c b/kernel/softirq.c
index 14d7758..aa82723 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -620,8 +620,7 @@ static void remote_softirq_receive(void *data)
 	unsigned long flags;
 	int softirq;
 
-	softirq = cp->priv;
-
+	softirq = *(int *)cp->info;
 	local_irq_save(flags);
 	__local_trigger(cp, softirq);
 	local_irq_restore(flags);
@@ -631,9 +630,8 @@ static int __try_remote_softirq(struct call_single_data *cp, int cpu, int softir
 {
 	if (cpu_online(cpu)) {
 		cp->func = remote_softirq_receive;
-		cp->info = cp;
+		cp->info = &softirq;
 		cp->flags = 0;
-		cp->priv = softirq;
 
 		__smp_call_function_single(cpu, cp, 0);
 		return 0;
-- 
1.7.2.5

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