[S390] monreader: 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>
diff --git a/drivers/s390/char/monreader.c b/drivers/s390/char/monreader.c
index 66e21dd..60473f8 100644
--- a/drivers/s390/char/monreader.c
+++ b/drivers/s390/char/monreader.c
@@ -12,7 +12,6 @@
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
-#include <linux/smp_lock.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/kernel.h>
@@ -283,7 +282,6 @@
/*
* only one user allowed
*/
- lock_kernel();
rc = -EBUSY;
if (test_and_set_bit(MON_IN_USE, &mon_in_use))
goto out;
@@ -321,7 +319,6 @@
}
filp->private_data = monpriv;
dev_set_drvdata(monreader_device, monpriv);
- unlock_kernel();
return nonseekable_open(inode, filp);
out_path:
@@ -331,7 +328,6 @@
out_use:
clear_bit(MON_IN_USE, &mon_in_use);
out:
- unlock_kernel();
return rc;
}
@@ -607,6 +603,10 @@
}
dcss_mkname(mon_dcss_name, &user_data_connect[8]);
+ /*
+ * 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 < 0 )
goto out;