linux-kernel - [PATCH] Tasklets: Avoid duplicating __tasklet_{,hi

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Message-ID: <20080219153720.GA2967@ubuntu>
Date:	Tue, 19 Feb 2008 17:37:20 +0200
From:	"Ahmed S. Darwish" <darwish.07@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...hat.com>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] Tasklets: Avoid duplicating __tasklet_{,hi_}schedule() code

Hi all,

Avoid duplicating __tasklet_schedule() and __tasklet_hi_schedule()
code in tasklet_action() and tasklet_hi_action() respectively.

Signed-off-by: Ahmed S. Darwish <darwish.07@...il.com>
---

This also saves a few bytes of image space:

   text	   data	    bss	    dec	    hex	filename
   3632	     12	    324	   3968	    f80	softirq.o.before
   3552	     12	    324	   3888	    f30	softirq.o.after

diff --git a/kernel/softirq.c b/kernel/softirq.c
index 5b3aea5..3068dc3 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -414,11 +414,8 @@ static void tasklet_action(struct softirq_action *a)
 			tasklet_unlock(t);
 		}
 
-		local_irq_disable();
-		t->next = __get_cpu_var(tasklet_vec).list;
-		__get_cpu_var(tasklet_vec).list = t;
-		__raise_softirq_irqoff(TASKLET_SOFTIRQ);
-		local_irq_enable();
+		/* We were not lucky enough to run, reschedule. */
+		__tasklet_schedule(t);
 	}
 }
 
@@ -447,11 +444,8 @@ static void tasklet_hi_action(struct softirq_action *a)
 			tasklet_unlock(t);
 		}
 
-		local_irq_disable();
-		t->next = __get_cpu_var(tasklet_hi_vec).list;
-		__get_cpu_var(tasklet_hi_vec).list = t;
-		__raise_softirq_irqoff(HI_SOFTIRQ);
-		local_irq_enable();
+		/* We were not lucky enough to run, reschedule. */
+		__tasklet_hi_schedule(t);
 	}
 }
 

Regards,

-- 
Ahmed S. Darwish
Homepage: http://darwish.07.googlepages.com
Blog: http://darwish-07.blogspot.com

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