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ieee1394: video1394: reorder module init, prepare BKL removal

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This prepares video1394 for removal of the BKL (big kernel lock):
It allows video1394_open() to be called while video1394_init_module()
is still in progress.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Stefan Richter 2008-05-19 22:07:28 +02:00
parent fde675fa2a
commit 055a7da0bb
3 changed files with 15 additions and 4 deletions
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4
drivers/ieee1394/highlevel.c
View File

@ -228,10 +228,8 @@ void hpsb_register_highlevel(struct hpsb_highlevel *hl)
{
unsigned long flags;
hpsb_init_highlevel(hl);
INIT_LIST_HEAD(&hl->addr_list);
INIT_LIST_HEAD(&hl->host_info_list);
rwlock_init(&hl->host_info_lock);
down_write(&hl_drivers_sem);
list_add_tail(&hl->hl_list, &hl_drivers);

13
drivers/ieee1394/highlevel.h
View File

@ -2,7 +2,7 @@
#define IEEE1394_HIGHLEVEL_H
#include <linux/list.h>
#include <linux/spinlock_types.h>
#include <linux/spinlock.h>
#include <linux/types.h>
struct module;
@ -103,6 +103,17 @@ int highlevel_lock64(struct hpsb_host *host, int nodeid, octlet_t *store,
void highlevel_fcp_request(struct hpsb_host *host, int nodeid, int direction,
void *data, size_t length);
/**
* hpsb_init_highlevel - initialize a struct hpsb_highlevel
*
* This is only necessary if hpsb_get_hostinfo_bykey can be called
* before hpsb_register_highlevel.
*/
static inline void hpsb_init_highlevel(struct hpsb_highlevel *hl)
{
rwlock_init(&hl->host_info_lock);
INIT_LIST_HEAD(&hl->host_info_list);
}
void hpsb_register_highlevel(struct hpsb_highlevel *hl);
void hpsb_unregister_highlevel(struct hpsb_highlevel *hl);

2
drivers/ieee1394/video1394.c
View File

@ -1503,6 +1503,8 @@ static int __init video1394_init_module (void)
{
int ret;
hpsb_init_highlevel(&video1394_highlevel);
cdev_init(&video1394_cdev, &video1394_fops);
video1394_cdev.owner = THIS_MODULE;
ret = cdev_add(&video1394_cdev, IEEE1394_VIDEO1394_DEV, 16);