diff options
| author | Matthias Kaehlcke <matthias.kaehlcke@gmail.com> | 2007-05-08 00:39:49 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-08 11:15:33 -0700 |
| commit | c831c338f0ad299fcd1592c6e4f30657480f39af (patch) | |
| tree | e2562fbcffe80e9d78255a92aab7f7db1f761e9d /drivers/char/vc_screen.c | |
| parent | 159dde93692ef549a0b2012c9f25feb4df638c9c (diff) | |
| download | kernel-common-c831c338f0ad299fcd1592c6e4f30657480f39af.tar.gz kernel-common-c831c338f0ad299fcd1592c6e4f30657480f39af.tar.bz2 kernel-common-c831c338f0ad299fcd1592c6e4f30657480f39af.zip | |
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.c | 18 |
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; } |