From 801f97b7da9dff4aace7111bfe0d073caf5febd2 Mon Sep 17 00:00:00 2001 From: Gerald Schaefer Date: Mon, 7 Dec 2009 12:52:18 +0100 Subject: [PATCH] [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 Signed-off-by: Martin Schwidefsky --- drivers/s390/char/monwriter.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/s390/char/monwriter.c b/drivers/s390/char/monwriter.c index 66fb8eba93f4..6532ed8b4afa 100644 --- a/drivers/s390/char/monwriter.c +++ b/drivers/s390/char/monwriter.c @@ -13,7 +13,6 @@ #include #include #include -#include #include #include #include @@ -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; -- 2.20.1