diff options
| -rw-r--r-- | drivers/char/mem.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/char/mem.c b/drivers/char/mem.c index 934ffafedae..070e22e8ea9 100644 --- a/drivers/char/mem.c +++ b/drivers/char/mem.c @@ -26,6 +26,7 @@ #include <linux/bootmem.h> #include <linux/splice.h> #include <linux/pfn.h> +#include <linux/smp_lock.h> #include <asm/uaccess.h> #include <asm/io.h> @@ -889,6 +890,9 @@ static const struct file_operations kmsg_fops = { static int memory_open(struct inode * inode, struct file * filp) { + int ret = 0; + + lock_kernel(); switch (iminor(inode)) { case 1: filp->f_op = &mem_fops; @@ -932,11 +936,13 @@ static int memory_open(struct inode * inode, struct file * filp) break; #endif default: + unlock_kernel(); return -ENXIO; } if (filp->f_op && filp->f_op->open) - return filp->f_op->open(inode,filp); - return 0; + ret = filp->f_op->open(inode,filp); + unlock_kernel(); + return ret; } static const struct file_operations memory_fops = { |