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vcs: BKL pushdown

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Add explicit BKL to vcs_open().

Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Jonathan Corbet 2008-05-16 13:47:50 -06:00
parent 609f9e92b5
commit f97259e35d
1 changed files with 7 additions and 2 deletions
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9
drivers/char/vc_screen.c
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@ -34,6 +34,7 @@
#include <linux/kbd_kern.h> #include <linux/kbd_kern.h>
#include <linux/console.h> #include <linux/console.h>
#include <linux/device.h> #include <linux/device.h>
#include <linux/smp_lock.h>
#include <asm/uaccess.h> #include <asm/uaccess.h>
#include <asm/byteorder.h> #include <asm/byteorder.h>
@ -460,9 +461,13 @@ static int
vcs_open(struct inode *inode, struct file *filp) vcs_open(struct inode *inode, struct file *filp)
{ {
unsigned int currcons = iminor(inode) & 127; unsigned int currcons = iminor(inode) & 127;
int ret = 0;
lock_kernel();
if(currcons && !vc_cons_allocated(currcons-1)) if(currcons && !vc_cons_allocated(currcons-1))
return -ENXIO; ret = -ENXIO;
return 0; unlock_kernel();
return ret;
} }
static const struct file_operations vcs_fops = { static const struct file_operations vcs_fops = {