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authorArnd Bergmann <arnd@arndb.de>2008-05-20 19:16:17 +0200
committerJonathan Corbet <corbet@lwn.net>2008-07-02 15:06:04 -0600
commit6ce46a435a3ac9e706d09a3075cbc60ed72d37db (patch)
tree91cc328ba211ec377c29a460bd9dc10c2374fcdc /drivers/s390/char/monreader.c
parent77149367dade50af8370420265bd4f818cde8afd (diff)
monreader: BKL pushdown
[jmc: added <linux/smp_lock.h>] Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'drivers/s390/char/monreader.c')
-rw-r--r--drivers/s390/char/monreader.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/s390/char/monreader.c b/drivers/s390/char/monreader.c
index 1e1f50655bb..dc4710e64e0 100644
--- a/drivers/s390/char/monreader.c
+++ b/drivers/s390/char/monreader.c
@@ -11,6 +11,7 @@
#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>
@@ -340,6 +341,7 @@ static int mon_open(struct inode *inode, struct file *filp)
/*
* only one user allowed
*/
+ lock_kernel();
rc = -EBUSY;
if (test_and_set_bit(MON_IN_USE, &mon_in_use))
goto out;
@@ -377,6 +379,7 @@ static int mon_open(struct inode *inode, struct file *filp)
}
P_INFO("open, established connection to *MONITOR service\n\n");
filp->private_data = monpriv;
+ unlock_kernel();
return nonseekable_open(inode, filp);
out_path:
@@ -386,6 +389,7 @@ out_priv:
out_use:
clear_bit(MON_IN_USE, &mon_in_use);
out:
+ unlock_kernel();
return rc;
}