Re: [KJ] [PATCH] unified spinlock initialization

Re: [KJ] [PATCH] unified spinlock initialization

[Matthew Wilcox]

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On Thu, Jan 20, 2005 at 08:56:18PM +0530, Amit Gud wrote:
> Unify the spinlock initialization as far as possible.

Why would you want to replace a statically initialised spinlock with
one that's initialised at runtime?

-- 
"Next the statesmen will invent cheap lies, putting the blame upon 
the nation that is attacked, and every man will be glad of those
conscience-soothing falsities, and will diligently study them, and refuse
to examine any refutations of them; and thus he will by and by convince 
himself that the war is just, and will thank God for the better sleep 
he enjoys after this process of grotesque self-deception." -- Mark Twain

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[KJ] [PATCH] unified spinlock initialization

[Amit Gud]

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Unify the spinlock initialization as far as possible.

Do consider applying.

Signed-off-by: Amit Gud <gud@eth.net>


--- vanilla-2.6.10/arch/um/drivers/net_kern.c	2005-01-19 11:19:23.000000000 +0530
+++ linux-2.6.10/arch/um/drivers/net_kern.c	2005-01-20 20:28:31.000000000 +0530
@@ -30,7 +30,7 @@
 #include "irq_user.h"
 #include "irq_kern.h"
 
-static spinlock_t opened_lock = SPIN_LOCK_UNLOCKED;
+static spinlock_t opened_lock;
 LIST_HEAD(opened);
 
 static int uml_net_rx(struct net_device *dev)
@@ -286,7 +286,7 @@ void uml_net_user_timer_expire(unsigned 
 #endif
 }
 
-static spinlock_t devices_lock = SPIN_LOCK_UNLOCKED;
+static spinlock_t devices_lock;
 static struct list_head devices = LIST_HEAD_INIT(devices);
 
 static int eth_configure(int n, void *init, char *mac,
@@ -371,7 +371,6 @@ static int eth_configure(int n, void *in
 	save = lp->user[0];
 	*lp = ((struct uml_net_private)
 		{ .list  		= LIST_HEAD_INIT(lp->list),
-		  .lock 		= SPIN_LOCK_UNLOCKED,
 		  .dev 			= dev,
 		  .fd 			= -1,
 		  .mac 			= { 0xfe, 0xfd, 0x0, 0x0, 0x0, 0x0},
@@ -387,6 +386,7 @@ static int eth_configure(int n, void *in
 		  .set_mtu 		= transport->user->set_mtu,
 		  .user  		= { save } });
 
+	spin_lock_init(&lp->lock);
 	init_timer(&lp->tl);
 	lp->tl.function = uml_net_user_timer_expire;
 	if (lp->have_mac)
@@ -679,6 +679,8 @@ static int uml_net_init(void)
 	struct in_device *ip;
 	struct in_ifaddr *in;
 
+	spin_lock_init(&opened_lock);
+	spin_lock_init(&devices_lock);
 	mconsole_register_dev(&net_mc);
 	register_inetaddr_notifier(&uml_inetaddr_notifier);
 


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[KJ] [PATCH] unified spinlock initialization

[Amit Gud]

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Unify the spinlock initialization as far as possible.

Do consider applying.

Signed-off-by: Amit Gud <gud@eth.net>


--- vanilla-2.6.10/arch/um/drivers/mconsole_kern.c	2005-01-19 11:19:23.000000000 +0530
+++ linux-2.6.10/arch/um/drivers/mconsole_kern.c	2005-01-20 20:16:58.000000000 +0530
@@ -454,12 +454,14 @@ void mconsole_sysrq(struct mc_request *r
  * active.
  */
 static char *notify_socket = NULL; 
+static spinlock_t notify_spinlock;
 
 int mconsole_init(void)
 {
 	int err, sock;
 	char file[256];
 
+	spin_lock_init(&notify_spinlock);
 	if(umid_file_name("mconsole", file, sizeof(file))) return(-1);
 	snprintf(mconsole_socket_name, sizeof(file), "%s", file);
 
@@ -535,8 +537,6 @@ static int create_proc_mconsole(void)
 	return(0);
 }
 
-static spinlock_t notify_spinlock = SPIN_LOCK_UNLOCKED;
-
 void lock_notify(void)
 {
 	spin_lock(&notify_spinlock);


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[KJ] [PATCH] unified spinlock initialization

[Amit Gud]

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Unify the spinlock initialization as far as possible.

Do consider applying.

Signed-off-by: Amit Gud <gud@eth.net>


--- vanilla-2.6.10/arch/um/drivers/port_kern.c	2005-01-19 11:19:23.000000000 +0530
+++ linux-2.6.10/arch/um/drivers/port_kern.c	2005-01-20 20:18:37.000000000 +0530
@@ -185,11 +185,11 @@ void *port_data(int port_num)
 		  .has_connection 	= 0,
 		  .sem 			= __SEMAPHORE_INITIALIZER(port->sem, 
 								  0),
-		  .lock 		= SPIN_LOCK_UNLOCKED,
 		  .port 	 	= port_num,
 		  .fd  			= fd,
 		  .pending 		= LIST_HEAD_INIT(port->pending),
 		  .connections 		= LIST_HEAD_INIT(port->connections) });
+	spin_lock_init(&port->lock);
 	list_add(&port->list, &ports);
 
  found:


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[KJ] [PATCH] unified spinlock initialization

[Amit Gud]

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Unify the spinlock initialization as far as possible.

Do consider applying.

Signed-off-by: Amit Gud <gud@eth.net>


--- vanilla-2.6.10/arch/um/drivers/ubd_kern.c	2005-01-20 20:08:30.000000000 +0530
+++ linux-2.6.10/arch/um/drivers/ubd_kern.c	2005-01-20 20:03:08.000000000 +0530
@@ -54,8 +54,8 @@
 #include "mem.h"
 #include "mem_kern.h"
 
-static spinlock_t ubd_io_lock = SPIN_LOCK_UNLOCKED;
-static spinlock_t ubd_lock = SPIN_LOCK_UNLOCKED;
+static spinlock_t ubd_io_lock;
+static spinlock_t ubd_lock;
 
 static void (*do_ubd)(void);
 
@@ -744,6 +744,9 @@ int ubd_init(void)
 {
         int i;
 
+	spin_lock_init(&ubd_lock);
+	spin_lock_init(&ubd_io_lock);
+
 	devfs_mk_dir("ubd");
 	if (register_blkdev(MAJOR_NR, "ubd"))
 		return -1;


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[KJ] [PATCH] unified spinlock initialization drivers/acpi/ec.c

[Amit Gud]

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Unify the spinlock initialization as far as possible.

Do consider applying.

Signed-off-by: Amit Gud <gud@eth.net>


--- vanilla-2.6.10/drivers/acpi/ec.c	2005-01-19 11:19:24.000000000 +0530
+++ linux-2.6.10/drivers/acpi/ec.c	2005-01-24 15:01:45.000000000 +0530
@@ -599,7 +599,7 @@ acpi_ec_add (
 
 	ec->handle = device->handle;
 	ec->uid = -1;
-	ec->lock = SPIN_LOCK_UNLOCKED;
+	spin_lock_init(&ec->lock);
 	strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME);
 	strcpy(acpi_device_class(device), ACPI_EC_CLASS);
 	acpi_driver_data(device) = ec;
@@ -813,7 +813,7 @@ acpi_ec_ecdt_probe (void)
 	ec_ecdt->status_addr = ecdt_ptr->ec_control;
 	ec_ecdt->data_addr = ecdt_ptr->ec_data;
 	ec_ecdt->gpe_bit = ecdt_ptr->gpe_bit;
-	ec_ecdt->lock = SPIN_LOCK_UNLOCKED;
+	spin_lock_init(&ec_ecdt->lock);
 	/* use the GL just to be safe */
 	ec_ecdt->global_lock = TRUE;
 	ec_ecdt->uid = ecdt_ptr->uid;


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[KJ] [PATCH] unified spinlock initialization

[Amit Gud]

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Unify the spinlock initialization as far as possible.

Do consider applying.

Signed-off-by: Amit Gud <gud@eth.net>


--- vanilla-2.6.10/drivers/block/cciss_scsi.c	2005-01-19 11:19:25.000000000 +0530
+++ linux-2.6.10/drivers/block/cciss_scsi.c	2005-01-24 19:33:24.000000000 +0530
@@ -534,7 +534,7 @@ cciss_scsi_setup(int cntl_num)
 	if (shba == NULL)
 		return;
 	shba->scsi_host = NULL;
-	shba->lock = SPIN_LOCK_UNLOCKED;
+	spin_lock_init(&shba->lock);
 	shba->registered = 0;
 	if (scsi_cmd_stack_setup(cntl_num, shba) != 0) {
 		kfree(shba);


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[KJ] [PATCH] unified spinlock initialization drivers/block/DAC960.c

[Amit Gud]

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Unify the spinlock initialization as far as possible.

Do consider applying.

Signed-off-by: Amit Gud <gud@eth.net>


--- vanilla-2.6.10/drivers/block/DAC960.c	2005-01-19 11:19:25.000000000 +0530
+++ linux-2.6.10/drivers/block/DAC960.c	2005-01-24 19:31:13.000000000 +0530
@@ -2738,7 +2738,7 @@ DAC960_DetectController(struct pci_dev *
   }
   init_waitqueue_head(&Controller->CommandWaitQueue);
   init_waitqueue_head(&Controller->HealthStatusWaitQueue);
-  Controller->queue_lock = SPIN_LOCK_UNLOCKED; 
+  spin_lock_init(&Controller->queue_lock); 
   DAC960_AnnounceDriver(Controller);
   /*
     Map the Controller Register Window.


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[KJ] [PATCH] unified spinlock initialization

[Amit Gud]

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Unify the spinlock initialization as far as possible.

Do consider applying.

Signed-off-by: Amit Gud <gud@eth.net>

--- vanilla-2.6.10/drivers/char/drm/drm_auth.h	2004-10-19 03:25:07.000000000 +0530
+++ linux-2.6.10/drivers/char/drm/drm_auth.h	2005-01-24 20:07:39.000000000 +0530
@@ -174,11 +174,12 @@ int DRM(getmagic)(struct inode *inode, s
 		  unsigned int cmd, unsigned long arg)
 {
 	static drm_magic_t sequence = 0;
-	static spinlock_t  lock	    = SPIN_LOCK_UNLOCKED;
+	static spinlock_t  lock;
 	drm_file_t	   *priv    = filp->private_data;
 	drm_device_t	   *dev	    = priv->dev;
 	drm_auth_t	   auth;
-
+	
+	spin_lock_init(&lock);
 				/* Find unique magic */
 	if (priv->magic) {
 		auth.magic = priv->magic;


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[KJ] [PATCH] unified spinlock initialization

[Amit Gud]

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Unify the spinlock initialization as far as possible.

Do consider applying.

Signed-off-by: Amit Gud <gud@eth.net>

--- vanilla-2.6.10/drivers/char/drm/drm_drv.h	2005-01-19 11:19:25.000000000 +0530
+++ linux-2.6.10/drivers/char/drm/drm_drv.h	2005-01-24 20:09:35.000000000 +0530
@@ -447,7 +447,7 @@ static int DRM(probe)(struct pci_dev *pd
 	dev = &(DRM(device)[DRM(numdevs)]);
 
 	memset( (void *)dev, 0, sizeof(*dev) );
-	dev->count_lock = SPIN_LOCK_UNLOCKED;
+	spin_lock_init(&dev->count_lock);
 	init_timer( &dev->timer );
 	sema_init( &dev->struct_sem, 1 );
 	sema_init( &dev->ctxlist_sem, 1 );


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Re: [KJ] [PATCH] unified spinlock initialization

[Randy.Dunlap]

Christophe Lucas wrote:
> In: drivers/misc/ibmasm/module.c
> 
> Signed-off-by: Christophe Lucas <c.lucas@ifrance.com>
> 
> 
> ------------------------------------------------------------------------
> 
> diff -urbNB linux-2.6.10-vanilla/drivers/misc/ibmasm/module.c linux-2.6.10/drivers/misc/ibmasm/module.c
> --- linux-2.6.10-vanilla/drivers/misc/ibmasm/module.c	2005-01-24 17:08:09.000000000 +0100
> +++ linux-2.6.10/drivers/misc/ibmasm/module.c	2005-01-24 17:18:31.000000000 +0100
> @@ -107,7 +107,7 @@
>  		goto error_remote_queue;
>  	}
>  
> -	sp->lock = SPIN_LOCK_UNLOCKED;
> +	spin_lock_init( &sp->lock );

Please lose those spaces... that's not kernel coding style.

-- 
~Randy
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[KJ] [PATCH] unified spinlock initialization

[Christophe Lucas]

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In: drivers/misc/ibmasm/module.c

Signed-off-by: Christophe Lucas <c.lucas@ifrance.com>
-- 
Christophe

[-- Attachment #2.2: ibmmasm-module-unified-spinlock.patch --]
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diff -urbNB linux-2.6.10-vanilla/drivers/misc/ibmasm/module.c linux-2.6.10/drivers/misc/ibmasm/module.c
--- linux-2.6.10-vanilla/drivers/misc/ibmasm/module.c	2005-01-24 17:08:09.000000000 +0100
+++ linux-2.6.10/drivers/misc/ibmasm/module.c	2005-01-24 17:18:31.000000000 +0100
@@ -107,7 +107,7 @@
 		goto error_remote_queue;
 	}
 
-	sp->lock = SPIN_LOCK_UNLOCKED;
+	spin_lock_init( &sp->lock );
 	INIT_LIST_HEAD(&sp->command_queue);
 
 	result = request_irq(sp->irq, ibmasm_interrupt_handler, SA_SHIRQ, sp->devname, (void*)sp);

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Re: [KJ] [PATCH] unified spinlock initialization

[Domen Puncer]

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Already done in 2.6.11-rc2, look below for some comments.

On 24/01/05 21:00 +0530, Amit Gud wrote:
> Unify the spinlock initialization as far as possible.
> 
> Do consider applying.
> 
> Signed-off-by: Amit Gud <gud@eth.net>
> 
> --- vanilla-2.6.10/drivers/char/drm/drm_auth.h	2004-10-19 03:25:07.000000000 +0530
> +++ linux-2.6.10/drivers/char/drm/drm_auth.h	2005-01-24 20:07:39.000000000 +0530
> @@ -174,11 +174,12 @@ int DRM(getmagic)(struct inode *inode, s
>  		  unsigned int cmd, unsigned long arg)
>  {
>  	static drm_magic_t sequence = 0;
> -	static spinlock_t  lock	    = SPIN_LOCK_UNLOCKED;
> +	static spinlock_t  lock;
>  	drm_file_t	   *priv    = filp->private_data;
>  	drm_device_t	   *dev	    = priv->dev;
>  	drm_auth_t	   auth;
> -
> +	

You added whitespace.


> +	spin_lock_init(&lock);

This changes behaviour, because of static lock wasn't initialized on
every function run, now it is, which makes it rather useless.

Correct way to do this seems to be what is already in 2.6.11-rc2 in
drm_auth.c:

	static drm_magic_t sequence = 0;
	static DEFINE_SPINLOCK(lock);
	drm_file_t         *priv    = filp->private_data;



	Domen

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Re: [KJ] [PATCH] unified spinlock initialization

[Christophe Lucas]

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Randy.Dunlap (rddunlap@osdl.org) wrote:
> Christophe Lucas wrote:
> >In: drivers/misc/ibmasm/module.c
> >
> >Signed-off-by: Christophe Lucas <c.lucas@ifrance.com>
> >
> >
> >------------------------------------------------------------------------
> >
> >diff -urbNB linux-2.6.10-vanilla/drivers/misc/ibmasm/module.c 
> >linux-2.6.10/drivers/misc/ibmasm/module.c
> >--- linux-2.6.10-vanilla/drivers/misc/ibmasm/module.c	2005-01-24 
> >17:08:09.000000000 +0100
> >+++ linux-2.6.10/drivers/misc/ibmasm/module.c	2005-01-24 
> >17:18:31.000000000 +0100
> >@@ -107,7 +107,7 @@
> > 		goto error_remote_queue;
> > 	}
> > 
> >-	sp->lock = SPIN_LOCK_UNLOCKED;
> >+	spin_lock_init( &sp->lock );
> 
> Please lose those spaces... that's not kernel coding style.

Hi,

Thanks Randy,
Here is the corrected patch.
In: drivers/misc/ibmasm/module.c

Signed-off-by: Christophe Lucas <c.lucas@ifrance.com>

Have a good day :)
-- 
Christophe

[-- Attachment #2: ibmmasm-module-unified-spinlock.patch --]
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diff -urbNB linux-2.6.10-vanilla/drivers/misc/ibmasm/module.c linux-2.6.10/drivers/misc/ibmasm/module.c
--- linux-2.6.10-vanilla/drivers/misc/ibmasm/module.c	2005-01-24 17:08:09.000000000 +0100
+++ linux-2.6.10/drivers/misc/ibmasm/module.c	2005-01-24 17:18:31.000000000 +0100
@@ -107,7 +107,7 @@
 		goto error_remote_queue;
 	}
 
-	sp->lock = SPIN_LOCK_UNLOCKED;
+	spin_lock_init(&sp->lock);
 	INIT_LIST_HEAD(&sp->command_queue);
 
 	result = request_irq(sp->irq, ibmasm_interrupt_handler, SA_SHIRQ, sp->devname, (void*)sp);

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[KJ] [PATCH] Unified spinlock initialization

[Christophe Lucas]

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Unified spinlock initialization.

Signed-off-by: Christophe Lucas <c.lucas@ifrance.com>
-- 
Christophe

[-- Attachment #2: skystar2-unified-spinlock.patch --]
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diff -urB linux-2.6.10-vanilla/drivers/media/dvb/b2c2/skystar2.c linux-2.6.10/drivers/media/dvb/b2c2/skystar2.c
--- linux-2.6.10-vanilla/drivers/media/dvb/b2c2/skystar2.c	2005-01-24 17:07:56.000000000 +0100
+++ linux-2.6.10/drivers/media/dvb/b2c2/skystar2.c	2005-01-24 20:40:35.000000000 +0100
@@ -1979,7 +1979,7 @@
 		ctrl_enable_mac(adapter, 1);
 	}
 
-	adapter->lock = SPIN_LOCK_UNLOCKED;
+	spin_lock_init(&adapter->lock);
 
 	return 0;
 }

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Re: [KJ] [PATCH] Unified spinlock initialization

[Amit Gud]

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Fixed in 2.6.11-rc2

On Tue, 2005-01-25 at 12:37, Christophe Lucas wrote:
> Unified spinlock initialization.
> 
> Signed-off-by: Christophe Lucas <c.lucas@ifrance.com>


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[PATCH] unified spinlock initialization arch/mips/kernel/irq.c

[Amit Gud]

Unify the spinlock initialization as far as possible.

Do consider applying.

Signed-off-by: Amit Gud <gud@eth.net>

--- orig/arch/mips/kernel/irq.c	2005-01-20 20:06:12.000000000 +0530
+++ linux-2.6.11-rc2/arch/mips/kernel/irq.c	2005-01-25 15:29:35.000000000 +0530
@@ -125,7 +125,7 @@ void __init init_IRQ(void)
 		irq_desc[i].action  = NULL;
 		irq_desc[i].depth   = 1;
 		irq_desc[i].handler = &no_irq_type;
-		irq_desc[i].lock = SPIN_LOCK_UNLOCKED;
+		spin_lock_init(&irq_desc[i].lock);
 	}
 
 	arch_init_irq();

[KJ] [PATCH] unified spinlock initialization arch/mips/kernel/irq.c

[Amit Gud]

[-- Attachment #1: Type: text/plain, Size: 516 bytes --]

Unify the spinlock initialization as far as possible.

Do consider applying.

Signed-off-by: Amit Gud <gud@eth.net>

--- orig/arch/mips/kernel/irq.c	2005-01-20 20:06:12.000000000 +0530
+++ linux-2.6.11-rc2/arch/mips/kernel/irq.c	2005-01-25 15:29:35.000000000 +0530
@@ -125,7 +125,7 @@ void __init init_IRQ(void)
 		irq_desc[i].action  = NULL;
 		irq_desc[i].depth   = 1;
 		irq_desc[i].handler = &no_irq_type;
-		irq_desc[i].lock = SPIN_LOCK_UNLOCKED;
+		spin_lock_init(&irq_desc[i].lock);
 	}
 
 	arch_init_irq();


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Re: [KJ] [PATCH] unified spinlock initialization

[Matthew Wilcox]

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On Tue, Jan 25, 2005 at 05:04:21PM +0530, Amit Gud wrote:
> Unify the spinlock initialization as far as possible.
> 
> Do consider applying.

Actually, 'handler' and 'lock' are initialised for you (see
kernel/irq/handle.c) so I think those two lines can just be deleted.
'action' is also initialised to NULL implicitly, so that can go.
I think setting 'status' and 'depth' like that is also unnecessary.

> Signed-off-by: Amit Gud <gud@eth.net>
> 
> --- orig/arch/mips/kernel/irq.c	2005-01-20 20:06:12.000000000 +0530
> +++ linux-2.6.11-rc2/arch/mips/kernel/irq.c	2005-01-25 15:29:35.000000000 +0530
> @@ -125,7 +125,7 @@ void __init init_IRQ(void)
>  		irq_desc[i].action  = NULL;
>  		irq_desc[i].depth   = 1;
>  		irq_desc[i].handler = &no_irq_type;
> -		irq_desc[i].lock = SPIN_LOCK_UNLOCKED;
> +		spin_lock_init(&irq_desc[i].lock);
>  	}
>  
>  	arch_init_irq();
> 

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-- 
"Next the statesmen will invent cheap lies, putting the blame upon 
the nation that is attacked, and every man will be glad of those
conscience-soothing falsities, and will diligently study them, and refuse
to examine any refutations of them; and thus he will by and by convince 
himself that the war is just, and will thank God for the better sleep 
he enjoys after this process of grotesque self-deception." -- Mark Twain

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Re: [KJ] [PATCH] unified spinlock initialization arch/mips/kernel/irq.c

[Matthew Wilcox]

On Tue, Jan 25, 2005 at 05:04:21PM +0530, Amit Gud wrote:
> Unify the spinlock initialization as far as possible.
> 
> Do consider applying.

Actually, 'handler' and 'lock' are initialised for you (see
kernel/irq/handle.c) so I think those two lines can just be deleted.
'action' is also initialised to NULL implicitly, so that can go.
I think setting 'status' and 'depth' like that is also unnecessary.

> Signed-off-by: Amit Gud <gud@eth.net>
> 
> --- orig/arch/mips/kernel/irq.c	2005-01-20 20:06:12.000000000 +0530
> +++ linux-2.6.11-rc2/arch/mips/kernel/irq.c	2005-01-25 15:29:35.000000000 +0530
> @@ -125,7 +125,7 @@ void __init init_IRQ(void)
>  		irq_desc[i].action  = NULL;
>  		irq_desc[i].depth   = 1;
>  		irq_desc[i].handler = &no_irq_type;
> -		irq_desc[i].lock = SPIN_LOCK_UNLOCKED;
> +		spin_lock_init(&irq_desc[i].lock);
>  	}
>  
>  	arch_init_irq();
> 

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-- 
"Next the statesmen will invent cheap lies, putting the blame upon 
the nation that is attacked, and every man will be glad of those
conscience-soothing falsities, and will diligently study them, and refuse
to examine any refutations of them; and thus he will by and by convince 
himself that the war is just, and will thank God for the better sleep 
he enjoys after this process of grotesque self-deception." -- Mark Twain

[PATCH] Unified spinlock initialization include/linux/wait.h

[Amit Gud]

Unify the spinlock initialization as far as possible.

Do consider applying.

Signed-off-by: Amit Gud <gud@eth.net>

--- orig/include/linux/wait.h	2005-01-20 20:06:42.000000000 +0530
+++ linux-2.6.11-rc2/include/linux/wait.h	2005-01-25 16:41:31.000000000 +0530
@@ -79,7 +79,7 @@ typedef struct __wait_queue_head wait_qu
 
 static inline void init_waitqueue_head(wait_queue_head_t *q)
 {
-	q->lock = SPIN_LOCK_UNLOCKED;
+	spin_lock_init(&q->lock);
 	INIT_LIST_HEAD(&q->task_list);
 }
 

[KJ] [PATCH] Unified spinlock initialization include/linux/wait.h

[Amit Gud]

[-- Attachment #1: Type: text/plain, Size: 486 bytes --]

Unify the spinlock initialization as far as possible.

Do consider applying.

Signed-off-by: Amit Gud <gud@eth.net>

--- orig/include/linux/wait.h	2005-01-20 20:06:42.000000000 +0530
+++ linux-2.6.11-rc2/include/linux/wait.h	2005-01-25 16:41:31.000000000 +0530
@@ -79,7 +79,7 @@ typedef struct __wait_queue_head wait_qu
 
 static inline void init_waitqueue_head(wait_queue_head_t *q)
 {
-	q->lock = SPIN_LOCK_UNLOCKED;
+	spin_lock_init(&q->lock);
 	INIT_LIST_HEAD(&q->task_list);
 }
 


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