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[S390] 3270: remove BKL 

Replace BLK use in fs3270 with mutex.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky 2009-12-07 12:52:20 +01:00 committed by Martin Schwidefsky
parent feb5c5a450
commit 5cbb5f579e
1 changed files with 6 additions and 4 deletions
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10
drivers/s390/char/fs3270.c
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@ -38,6 +38,8 @@ struct fs3270 {
size_t rdbuf_size; /* size of data returned by RDBUF */
};
static DEFINE_MUTEX(fs3270_mutex);
static void
fs3270_wake_up(struct raw3270_request *rq, void *data)
{
@ -328,7 +330,7 @@ fs3270_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
if (!fp)
return -ENODEV;
rc = 0;
lock_kernel();
mutex_lock(&fs3270_mutex);
switch (cmd) {
case TUBICMD:
fp->read_command = arg;
@ -354,7 +356,7 @@ fs3270_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
rc = -EFAULT;
break;
}
unlock_kernel();
mutex_unlock(&fs3270_mutex);
return rc;
}
@ -437,7 +439,7 @@ fs3270_open(struct inode *inode, struct file *filp)
minor = tty->index + RAW3270_FIRSTMINOR;
tty_kref_put(tty);
}
lock_kernel();
mutex_lock(&fs3270_mutex);
/* Check if some other program is already using fullscreen mode. */
fp = (struct fs3270 *) raw3270_find_view(&fs3270_fn, minor);
if (!IS_ERR(fp)) {
@ -478,7 +480,7 @@ fs3270_open(struct inode *inode, struct file *filp)
}
filp->private_data = fp;
out:
unlock_kernel();
mutex_unlock(&fs3270_mutex);
return rc;
}