From 8c9150ca2220706abb9f7642fdc26f779800b3b7 Mon Sep 17 00:00:00 2001
From: Sebastian Schmelzer
Date: Tue, 8 Apr 2008 18:04:39 +0000
Subject:  * added kernel version check to module source  * removed branch for
 old kernels

git-svn-id: http://svn.openslx.org/svn/openslx/contrib/dnbd2/trunk@1731 95ad53e4-c205-0410-b2fa-d234c58c8868
---
 kernel/devices.c | 15 ++++++++++++---
 kernel/dnbd2.h   |  1 +
 kernel/servers.c | 34 ++++++++++++++++++++++++++++------
 3 files changed, 41 insertions(+), 9 deletions(-)

diff --git a/kernel/devices.c b/kernel/devices.c
index ccc6db1..7c1102b 100644
--- a/kernel/devices.c
+++ b/kernel/devices.c
@@ -106,8 +106,13 @@ int add_device(dnbd2_device_t *dev, int minor)
 	 * Prepare dnbd2_device_t. Please use the
 	 * same order as in dnbd2.h.
 	 */
-	INIT_WORK(&dev->work, NULL); //, NULL);
-	/* Change in /<linuxheaders>/include/linux/workqueue.h */
+
+	#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20))
+		INIT_WORK(&dev->work, NULL, NULL);
+	#else
+		INIT_WORK(&dev->work, NULL); 
+	#endif
+
 	spin_lock_init(&dev->kmap_lock);
 	for (i=0 ; i<POOL_SIZE ; i++)
 		dev->info_pool[i].cnt = -1;
@@ -145,7 +150,11 @@ int add_device(dnbd2_device_t *dev, int minor)
 		init_completion(&srv_info->rx_start);
 		init_completion(&srv_info->rx_stop);
 		init_waitqueue_head(&srv_info->wq);
-		INIT_WORK(&srv_info->work, NULL); //, NULL);
+	#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20))
+		INIT_WORK(&srv_info->work, NULL, NULL);
+	#else
+		INIT_WORK(&srv_info->work, NULL);
+	#endif
 		/* Change in /<linuxheaders>/include/linux/workqueue.h */
 		srv_info->dev = dev;
 	}
diff --git a/kernel/dnbd2.h b/kernel/dnbd2.h
index cf693d9..c49c9b9 100644
--- a/kernel/dnbd2.h
+++ b/kernel/dnbd2.h
@@ -11,6 +11,7 @@
 #include <linux/wait.h>
 #include <linux/inet.h>
 #include <linux/in.h>
+#include <linux/version.h>
 #include <asm/semaphore.h>
 #include <net/sock.h>
 #include "../include/dnbd2.h"
diff --git a/kernel/servers.c b/kernel/servers.c
index 7d5c229..52d565b 100644
--- a/kernel/servers.c
+++ b/kernel/servers.c
@@ -60,9 +60,17 @@ struct srv_info *fastest_server(uint16_t *srtt, dnbd2_device_t *dev)
  * This function can be enqueued in a workqueue. It removes srv_info
  * from the list of servers.
  */
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20))
+void del_server_work(void *data)
+#else
 void del_server_work(struct work_struct *work)
+#endif
 {
-	struct srv_info *srv_info = container_of(work, struct srv_info, work);
+	#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20))
+		struct srv_info *srv_info = data;
+	#else
+		struct srv_info *srv_info = container_of(work, struct srv_info, work);
+	#endif
 	dnbd2_device_t *dev = srv_info->dev;
 
 	down(&dev->servers_mutex);
@@ -80,9 +88,17 @@ void del_server_work(struct work_struct *work)
  * This function can be enqueued in a workqueue. Read comment on
  * schedule_activate_fastest in servers.h
  */
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20))
+void activate_fastest_work(void *data)
+#else
 void activate_fastest_work(struct work_struct *work)
+#endif
 {
-	dnbd2_device_t *dev = container_of(work, dnbd2_device_t, work);
+	#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20))
+		dnbd2_device_t *dev = data;	
+	#else
+		dnbd2_device_t *dev = container_of(work, dnbd2_device_t, work);
+	#endif
 	struct srv_info *alt_srv, *next_srv;
 	uint16_t min, srtt;
 	int newsrv = 0;
@@ -341,15 +357,21 @@ void enqueue_hb(struct srv_info *srv_info)
 
 void schedule_del_server(struct srv_info *srv_info)
 {
-	PREPARE_WORK(&srv_info->work, del_server_work); //, srv_info);
-	/* Change in /<linuxheaders>/include/linux/workqueue.h */
+	#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20))
+		PREPARE_WORK(&srv_info->work, del_server_work, srv_info);
+	#else
+		PREPARE_WORK(&srv_info->work, del_server_work);
+	#endif
 	schedule_work(&srv_info->work);
 }
 
 
 void schedule_activate_fastest(dnbd2_device_t *dev)
 {
-	PREPARE_WORK(&dev->work, activate_fastest_work); //, dev);
-	/* Change in /<linuxheaders>/include/linux/workqueue.h */
+	#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20))
+		PREPARE_WORK(&dev->work, activate_fastest_work, dev);
+	#else
+		PREPARE_WORK(&dev->work, activate_fastest_work);
+	#endif
 	schedule_work(&dev->work);
 }
-- 
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