[PATCH 4/7] i2c: scx200_acb - remove lock_kernel

[gardner.ben at gmail.com (Ben Gardner)]

Remove calls to lock_kernel() and unlock_kernel().
Replace with a mutex.

Signed-off-by: Ben Gardner <bgardner at wabtec.com>
-------------- next part --------------
 drivers/i2c/busses/scx200_acb.c |   13 +++++++------
 1 files changed, 7 insertions(+), 6 deletions(-)

--- linux-2.6.15-rc5-mm1.orig/drivers/i2c/busses/scx200_acb.c
+++ linux-2.6.15-rc5-mm1/drivers/i2c/busses/scx200_acb.c
@@ -384,6 +384,7 @@ static struct i2c_algorithm scx200_acb_a
 };
 
 static struct scx200_acb_iface *scx200_acb_list;
+static DECLARE_MUTEX(scx200_acb_list_mutex);
 
 static int scx200_acb_probe(struct scx200_acb_iface *iface)
 {
@@ -469,10 +470,10 @@ static int  __init scx200_acb_create(int
 		goto errout_release;
 	}
 
-	lock_kernel();
+	down(&scx200_acb_list_mutex);
 	iface->next     = scx200_acb_list;
 	scx200_acb_list = iface;
-	unlock_kernel();
+	up(&scx200_acb_list_mutex);
 
 	return 0;
 
@@ -514,17 +515,17 @@ static void __exit scx200_acb_cleanup(vo
 {
 	struct scx200_acb_iface *iface;
 
-	lock_kernel();
+	down(&scx200_acb_list_mutex);
 	while ((iface = scx200_acb_list) != NULL) {
 		scx200_acb_list = iface->next;
-		unlock_kernel();
+		up(&scx200_acb_list_mutex);
 
 		i2c_del_adapter(&iface->adapter);
 		release_region(iface->base, 8);
 		kfree(iface);
-		lock_kernel();
+		down(&scx200_acb_list_mutex);
 	}
-	unlock_kernel();
+	up(&scx200_acb_list_mutex);
 }
 
 module_init(scx200_acb_init);