linux-kernel - [PATCH 1/2] tasklet: remove tasklet_kill

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Date:	Wed, 31 Oct 2012 15:28:06 +0800
From:	Xiaotian Feng <xtfeng@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Xiaotian Feng <xtfeng@...il.com>,
	Xiaotian Feng <dannyfeng@...cent.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Frederic Weisbecker <fweisbec@...il.com>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Josh Triplett <josh@...htriplett.org>
Subject: [PATCH 1/2] tasklet: remove tasklet_kill_immediate()

tasklet_kill_immediate() is no longer used, just remove it.

Signed-off-by: Xiaotian Feng <dannyfeng@...cent.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Josh Triplett <josh@...htriplett.org>
---
 kernel/softirq.c |   32 --------------------------------
 1 file changed, 32 deletions(-)

diff --git a/kernel/softirq.c b/kernel/softirq.c
index cc96bdc..61abd86 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -762,38 +762,6 @@ static void run_ksoftirqd(unsigned int cpu)
 }
 
 #ifdef CONFIG_HOTPLUG_CPU
-/*
- * tasklet_kill_immediate is called to remove a tasklet which can already be
- * scheduled for execution on @cpu.
- *
- * Unlike tasklet_kill, this function removes the tasklet
- * _immediately_, even if the tasklet is in TASKLET_STATE_SCHED state.
- *
- * When this function is called, @cpu must be in the CPU_DEAD state.
- */
-void tasklet_kill_immediate(struct tasklet_struct *t, unsigned int cpu)
-{
-	struct tasklet_struct **i;
-
-	BUG_ON(cpu_online(cpu));
-	BUG_ON(test_bit(TASKLET_STATE_RUN, &t->state));
-
-	if (!test_bit(TASKLET_STATE_SCHED, &t->state))
-		return;
-
-	/* CPU is dead, so no lock needed. */
-	for (i = &per_cpu(tasklet_vec, cpu).head; *i; i = &(*i)->next) {
-		if (*i == t) {
-			*i = t->next;
-			/* If this was the tail element, move the tail ptr */
-			if (*i == NULL)
-				per_cpu(tasklet_vec, cpu).tail = i;
-			return;
-		}
-	}
-	BUG();
-}
-
 static void takeover_tasklets(unsigned int cpu)
 {
 	/* CPU is dead, so no lock needed. */
-- 
1.7.9.5

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