diff options
Diffstat (limited to 'arch/um')
| -rw-r--r-- | arch/um/drivers/harddog_kern.c | 3 | ||||
| -rw-r--r-- | arch/um/drivers/mmapper_kern.c | 2 | ||||
| -rw-r--r-- | arch/um/drivers/random.c | 3 |
3 files changed, 8 insertions, 0 deletions
diff --git a/arch/um/drivers/harddog_kern.c b/arch/um/drivers/harddog_kern.c index a9ad4bd6d953..d332503fa1be 100644 --- a/arch/um/drivers/harddog_kern.c +++ b/arch/um/drivers/harddog_kern.c @@ -66,6 +66,7 @@ static int harddog_open(struct inode *inode, struct file *file) int err = -EBUSY; char *sock = NULL; + lock_kernel(); spin_lock(&lock); if(timer_alive) goto err; @@ -82,9 +83,11 @@ static int harddog_open(struct inode *inode, struct file *file) timer_alive = 1; spin_unlock(&lock); + unlock_kernel(); return nonseekable_open(inode, file); err: spin_unlock(&lock); + unlock_kernel(); return err; } diff --git a/arch/um/drivers/mmapper_kern.c b/arch/um/drivers/mmapper_kern.c index 67b2f55a602f..eb240323c40a 100644 --- a/arch/um/drivers/mmapper_kern.c +++ b/arch/um/drivers/mmapper_kern.c @@ -16,6 +16,7 @@ #include <linux/miscdevice.h> #include <linux/module.h> #include <linux/mm.h> +#include <linux/smp_lock.h> #include <asm/uaccess.h> #include "mem_user.h" @@ -77,6 +78,7 @@ out: static int mmapper_open(struct inode *inode, struct file *file) { + cycle_kernel_lock(); return 0; } diff --git a/arch/um/drivers/random.c b/arch/um/drivers/random.c index 4949044773ba..6eabb7022a2d 100644 --- a/arch/um/drivers/random.c +++ b/arch/um/drivers/random.c @@ -7,6 +7,7 @@ * of the GNU General Public License, incorporated herein by reference. */ #include <linux/sched.h> +#include <linux/smp_lock.h> #include <linux/module.h> #include <linux/fs.h> #include <linux/interrupt.h> @@ -33,6 +34,8 @@ static DECLARE_WAIT_QUEUE_HEAD(host_read_wait); static int rng_dev_open (struct inode *inode, struct file *filp) { + cycle_kernel_lock(); + /* enforce read-only access to this chrdev */ if ((filp->f_mode & FMODE_READ) == 0) return -EINVAL; |