linux-kernel - [PATCH] sas_scsi_host: Convert to use the kthread API

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Date:	Thu, 19 Apr 2007 00:55:33 -0600
From:	"Eric W. Biederman" <ebiederm@...ssion.com>
To:	"<Andrew Morton" <akpm@...l.org>
Cc:	<containers@...ts.osdl.org>, Oleg Nesterov <oleg@...sign.ru>,
	Christoph Hellwig <hch@...radead.org>,
	<linux-kernel@...r.kernel.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>
Subject: [PATCH] sas_scsi_host: Convert to use the kthread API

From: Eric W. Biederman <ebiederm@...ssion.com> - unquoted

This patch modifies the sas scsi host thread startup
to use kthread_run not kernel_thread and deamonize.
kthread_run is slightly simpler and more maintainable.

Cc: Darrick J. Wong <djwong@...ibm.com>
Cc: James Bottomley <James.Bottomley@...elEye.com>
Signed-off-by: Eric W. Biederman <ebiederm@...ssion.com>
---
 drivers/scsi/libsas/sas_scsi_host.c |   11 ++++++-----
 1 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c
index 46ba3a7..7a38ac5 100644
--- a/drivers/scsi/libsas/sas_scsi_host.c
+++ b/drivers/scsi/libsas/sas_scsi_host.c
@@ -40,6 +40,7 @@
 #include <linux/blkdev.h>
 #include <linux/scatterlist.h>
 #include <linux/freezer.h>
+#include <linux/kthread.h>
 
 /* ---------- SCSI Host glue ---------- */
 
@@ -870,7 +871,6 @@ static int sas_queue_thread(void *_sas_ha)
 	struct sas_ha_struct *sas_ha = _sas_ha;
 	struct scsi_core *core = &sas_ha->core;
 
-	daemonize("sas_queue_%d", core->shost->host_no);
 	current->flags |= PF_NOFREEZE;
 
 	complete(&queue_th_comp);
@@ -891,19 +891,20 @@ static int sas_queue_thread(void *_sas_ha)
 
 int sas_init_queue(struct sas_ha_struct *sas_ha)
 {
-	int res;
 	struct scsi_core *core = &sas_ha->core;
+	struct task_struct *task;
 
 	spin_lock_init(&core->task_queue_lock);
 	core->task_queue_size = 0;
 	INIT_LIST_HEAD(&core->task_queue);
 	init_MUTEX_LOCKED(&core->queue_thread_sema);
 
-	res = kernel_thread(sas_queue_thread, sas_ha, 0);
-	if (res >= 0)
+	task = kthread_run(sas_queue_thread, sas_ha,
+			   "sas_queue_%d", core->shost->host_no);
+	if (!IS_ERR(task))
 		wait_for_completion(&queue_th_comp);
 
-	return res < 0 ? res : 0;
+	return IS_ERR(task) ? PTR_ERR(task) : 0;
 }
 
 void sas_shutdown_queue(struct sas_ha_struct *sas_ha)
-- 
1.5.0.g53756

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