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authorArnd Bergmann <arnd@arndb.de>2008-05-20 19:15:59 +0200
committerJonathan Corbet <corbet@lwn.net>2008-06-20 14:05:57 -0600
commit48b81880519274d2a8b3e9919a47d91d05a1c964 (patch)
tree6da458b2ca35a393ccbda7ef7eed39fa5a37f1f2 /drivers/char
parent986f8b8ccf4806c1e95528a6f157998113fb4f41 (diff)
hpet: BKL pushdown
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'drivers/char')
-rw-r--r--drivers/char/hpet.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
index e7fb0bca3667..fb0a85a1eb36 100644
--- a/drivers/char/hpet.c
+++ b/drivers/char/hpet.c
@@ -14,6 +14,7 @@
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/kernel.h>
+#include <linux/smp_lock.h>
#include <linux/types.h>
#include <linux/miscdevice.h>
#include <linux/major.h>
@@ -193,6 +194,7 @@ static int hpet_open(struct inode *inode, struct file *file)
if (file->f_mode & FMODE_WRITE)
return -EINVAL;
+ lock_kernel();
spin_lock_irq(&hpet_lock);
for (devp = NULL, hpetp = hpets; hpetp && !devp; hpetp = hpetp->hp_next)
@@ -207,6 +209,7 @@ static int hpet_open(struct inode *inode, struct file *file)
if (!devp) {
spin_unlock_irq(&hpet_lock);
+ unlock_kernel();
return -EBUSY;
}
@@ -214,6 +217,7 @@ static int hpet_open(struct inode *inode, struct file *file)
devp->hd_irqdata = 0;
devp->hd_flags |= HPET_OPEN;
spin_unlock_irq(&hpet_lock);
+ unlock_kernel();
return 0;
}