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authorLinus Torvalds <torvalds@linux-foundation.org>2008-07-14 14:48:31 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-14 14:48:31 -0700
commitd1794f2c5b5817eb79ccc5e00701ca748d1b073a (patch)
tree5a4c98e694e88a8c82f342d0cc9edb2a4cbbef36 /drivers/s390/char/monreader.c
parenta41eebab7537890409ea9dfe0fcda9b5fbdb090d (diff)
parent2fceef397f9880b212a74c418290ce69e7ac00eb (diff)
Merge branch 'bkl-removal' of git://git.lwn.net/linux-2.6
* 'bkl-removal' of git://git.lwn.net/linux-2.6: (146 commits) IB/umad: BKL is not needed for ib_umad_open() IB/uverbs: BKL is not needed for ib_uverbs_open() bf561-coreb: BKL unneeded for open() Call fasync() functions without the BKL snd/PCM: fasync BKL pushdown ipmi: fasync BKL pushdown ecryptfs: fasync BKL pushdown Bluetooth VHCI: fasync BKL pushdown tty_io: fasync BKL pushdown tun: fasync BKL pushdown i2o: fasync BKL pushdown mpt: fasync BKL pushdown Remove BKL from remote_llseek v2 Make FAT users happier by not deadlocking x86-mce: BKL pushdown vmwatchdog: BKL pushdown vmcp: BKL pushdown via-pmu: BKL pushdown uml-random: BKL pushdown uml-mmapper: BKL pushdown ...
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 f0e4c96afbf..35fd8dfcaaa 100644
--- a/drivers/s390/char/monreader.c
+++ b/drivers/s390/char/monreader.c
@@ -10,6 +10,7 @@
#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>
@@ -291,6 +292,7 @@ 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;
@@ -327,6 +329,7 @@ static int mon_open(struct inode *inode, struct file *filp)
goto out_path;
}
filp->private_data = monpriv;
+ unlock_kernel();
return nonseekable_open(inode, filp);
out_path:
@@ -336,6 +339,7 @@ out_priv:
out_use:
clear_bit(MON_IN_USE, &mon_in_use);
out:
+ unlock_kernel();
return rc;
}