diff options
| author | Gerald Schaefer <gerald.schaefer@de.ibm.com> | 2009-12-07 12:52:18 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> | 2009-12-07 12:51:38 +0100 |
| commit | 801f97b7da9dff4aace7111bfe0d073caf5febd2 (patch) | |
| tree | abbc0e1439102b7ae1e4c3580fbac2bdd12379cd /drivers/s390/char/monwriter.c | |
| parent | 1963403aae0fc5a4e20cf2e51e4f0148fdf938b4 (diff) | |
[S390] monwriter: remove lock_kernel() from open() function
The lock_kernel() calls in the open() function are unnecessary because
misc_register() is called last in module_init() and concurrent open()
calls are handled by other means.
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/char/monwriter.c')
| -rw-r--r-- | drivers/s390/char/monwriter.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/s390/char/monwriter.c b/drivers/s390/char/monwriter.c index 66fb8eba93f..6532ed8b4af 100644 --- a/drivers/s390/char/monwriter.c +++ b/drivers/s390/char/monwriter.c @@ -13,7 +13,6 @@ #include <linux/moduleparam.h> #include <linux/init.h> #include <linux/errno.h> -#include <linux/smp_lock.h> #include <linux/types.h> #include <linux/kernel.h> #include <linux/miscdevice.h> @@ -185,13 +184,11 @@ static int monwrite_open(struct inode *inode, struct file *filp) monpriv = kzalloc(sizeof(struct mon_private), GFP_KERNEL); if (!monpriv) return -ENOMEM; - lock_kernel(); INIT_LIST_HEAD(&monpriv->list); monpriv->hdr_to_read = sizeof(monpriv->hdr); mutex_init(&monpriv->thread_mutex); filp->private_data = monpriv; list_add_tail(&monpriv->priv_list, &mon_priv_list); - unlock_kernel(); return nonseekable_open(inode, filp); } @@ -364,6 +361,10 @@ static int __init mon_init(void) goto out_driver; } + /* + * misc_register() has to be the last action in module_init(), because + * file operations will be available right after this. + */ rc = misc_register(&mon_dev); if (rc) goto out_device; |