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authorMatthias Kaehlcke <matthias.kaehlcke@gmail.com>2007-05-08 00:39:49 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-08 11:15:33 -0700
commitc831c338f0ad299fcd1592c6e4f30657480f39af (patch)
treee2562fbcffe80e9d78255a92aab7f7db1f761e9d /drivers/char/vc_screen.c
parent159dde93692ef549a0b2012c9f25feb4df638c9c (diff)
use mutex instead of semaphore in virtual console driver
The virtual console driver uses a semaphore as mutex. Use the mutex API instead of the (binary) semaphore. Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char/vc_screen.c')
-rw-r--r--drivers/char/vc_screen.c18
1 files changed, 10 insertions, 8 deletions
diff --git a/drivers/char/vc_screen.c b/drivers/char/vc_screen.c
index 61fbc9e52eeb..83aeedda200c 100644
--- a/drivers/char/vc_screen.c
+++ b/drivers/char/vc_screen.c
@@ -28,11 +28,13 @@
#include <linux/interrupt.h>
#include <linux/mm.h>
#include <linux/init.h>
+#include <linux/mutex.h>
#include <linux/vt_kern.h>
#include <linux/selection.h>
#include <linux/kbd_kern.h>
#include <linux/console.h>
#include <linux/device.h>
+
#include <asm/uaccess.h>
#include <asm/byteorder.h>
#include <asm/unaligned.h>
@@ -69,11 +71,11 @@ static loff_t vcs_lseek(struct file *file, loff_t offset, int orig)
{
int size;
- down(&con_buf_sem);
+ mutex_lock(&con_buf_mtx);
size = vcs_size(file->f_path.dentry->d_inode);
switch (orig) {
default:
- up(&con_buf_sem);
+ mutex_unlock(&con_buf_mtx);
return -EINVAL;
case 2:
offset += size;
@@ -84,11 +86,11 @@ static loff_t vcs_lseek(struct file *file, loff_t offset, int orig)
break;
}
if (offset < 0 || offset > size) {
- up(&con_buf_sem);
+ mutex_unlock(&con_buf_mtx);
return -EINVAL;
}
file->f_pos = offset;
- up(&con_buf_sem);
+ mutex_unlock(&con_buf_mtx);
return file->f_pos;
}
@@ -105,7 +107,7 @@ vcs_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
unsigned short *org = NULL;
ssize_t ret;
- down(&con_buf_sem);
+ mutex_lock(&con_buf_mtx);
pos = *ppos;
@@ -262,7 +264,7 @@ vcs_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
ret = read;
unlock_out:
release_console_sem();
- up(&con_buf_sem);
+ mutex_unlock(&con_buf_mtx);
return ret;
}
@@ -279,7 +281,7 @@ vcs_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
u16 *org0 = NULL, *org = NULL;
size_t ret;
- down(&con_buf_sem);
+ mutex_lock(&con_buf_mtx);
pos = *ppos;
@@ -449,7 +451,7 @@ vcs_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
unlock_out:
release_console_sem();
- up(&con_buf_sem);
+ mutex_unlock(&con_buf_mtx);
return ret;
}