lkml.org 
[lkml]   [2009]   [Jun]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] tty_io: add an API to get device corresponding to tty_struct
Date
Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
---
drivers/char/tty_io.c | 20 ++++++++++++++++++++
include/linux/tty.h | 1 +
2 files changed, 21 insertions(+), 0 deletions(-)

diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index 66b99a2..0160500 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -3026,6 +3026,26 @@ dev_t tty_devnum(struct tty_struct *tty)
}
EXPORT_SYMBOL(tty_devnum);

+static int dev_match_devt(struct device *dev, void *data)
+{
+ dev_t *devt = data;
+ return dev->devt == *devt;
+}
+
+/**
+ * tty_get_device - get a device corresponding to tty
+ * @tty: the struct that describes the tty device
+ *
+ * Returns a pointer to the struct device for this tty device
+ * (or NULL in case of error).
+ */
+struct device *tty_get_device(struct tty_struct *tty)
+{
+ dev_t devt = tty_devnum(tty);
+ return class_find_device(tty_class, NULL, &devt, dev_match_devt);
+}
+EXPORT_SYMBOL(tty_get_device);
+
void proc_clear_tty(struct task_struct *p)
{
unsigned long flags;
diff --git a/include/linux/tty.h b/include/linux/tty.h
index fc39db9..d17ba1e 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -413,6 +413,7 @@ extern int tty_mode_ioctl(struct tty_struct *tty, struct file *file,
unsigned int cmd, unsigned long arg);
extern int tty_perform_flush(struct tty_struct *tty, unsigned long arg);
extern dev_t tty_devnum(struct tty_struct *tty);
+struct device *tty_get_device(struct tty_struct *tty);
extern void proc_clear_tty(struct task_struct *p);
extern struct tty_struct *get_current_tty(void);
extern void tty_default_fops(struct file_operations *fops);
--
1.6.3.1


\
 
 \ /
  Last update: 2009-06-02 17:25    [W:0.040 / U:0.008 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site