tty: core: Add tty_debug() for printk(KERN_DEBUG) messages
Introduce tty_debug() macro to output uniform debug information for
tty core debug messages (function name and tty name).
Note: printk(KERN_DEBUG) is retained here over pr_debug() since
messages can be enabled in non-DEBUG builds.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 1738fca..9537979 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -531,8 +531,8 @@
spin_unlock_irqrestore(&tty->ctrl_lock, flags);
tty->session = get_pid(task_session(current));
if (current->signal->tty) {
- printk(KERN_DEBUG "%s: %s: current tty %s not NULL!!\n",
- __func__, tty->name, current->signal->tty->name);
+ tty_debug(tty, "current tty %s not NULL!!\n",
+ current->signal->tty->name);
tty_kref_put(current->signal->tty);
}
put_pid(current->signal->tty_old_pgrp);
@@ -775,7 +775,7 @@
void tty_hangup(struct tty_struct *tty)
{
#ifdef TTY_DEBUG_HANGUP
- printk(KERN_DEBUG "%s hangup...\n", tty_name(tty));
+ tty_debug(tty, "\n");
#endif
schedule_work(&tty->hangup_work);
}
@@ -794,7 +794,7 @@
void tty_vhangup(struct tty_struct *tty)
{
#ifdef TTY_DEBUG_HANGUP
- printk(KERN_DEBUG "%s vhangup...\n", tty_name(tty));
+ tty_debug(tty, "\n")
#endif
__tty_hangup(tty, 0);
}
@@ -833,7 +833,7 @@
static void tty_vhangup_session(struct tty_struct *tty)
{
#ifdef TTY_DEBUG_HANGUP
- printk(KERN_DEBUG "%s vhangup session...\n", tty_name(tty));
+ tty_debug(tty, "\n");
#endif
__tty_hangup(tty, 1);
}
@@ -930,7 +930,7 @@
tty_kref_put(tty);
} else {
#ifdef TTY_DEBUG_HANGUP
- printk(KERN_DEBUG "%s: no current tty\n", __func__);
+ tty_debug(tty, "no current tty\n");
#endif
}
@@ -1712,8 +1712,7 @@
{
#ifdef TTY_PARANOIA_CHECK
if (idx < 0 || idx >= tty->driver->num) {
- printk(KERN_DEBUG "%s: %s: bad idx %d\n",
- __func__, tty->name, idx);
+ tty_debug(tty, "bad idx %d\n", idx);
return -1;
}
@@ -1722,22 +1721,20 @@
return 0;
if (tty != tty->driver->ttys[idx]) {
- printk(KERN_DEBUG "%s: %s: bad driver table[%d] = %p\n",
- __func__, tty->name, idx, tty->driver->ttys[idx]);
+ tty_debug(tty, "bad driver table[%d] = %p\n",
+ idx, tty->driver->ttys[idx]);
return -1;
}
if (tty->driver->other) {
struct tty_struct *o_tty = tty->link;
if (o_tty != tty->driver->other->ttys[idx]) {
- printk(KERN_DEBUG "%s: %s: bad other table[%d] = %p\n",
- __func__, tty->name, idx,
- tty->driver->other->ttys[idx]);
+ tty_debug(tty, "bad other table[%d] = %p\n",
+ idx, tty->driver->other->ttys[idx]);
return -1;
}
if (o_tty->link != tty) {
- printk(KERN_DEBUG "%s: %s: bad link = %p\n",
- __func__, tty->name, o_tty->link);
+ tty_debug(tty, "bad link = %p\n", o_tty->link);
return -1;
}
}
@@ -1792,8 +1789,7 @@
}
#ifdef TTY_DEBUG_HANGUP
- printk(KERN_DEBUG "%s: %s (tty count=%d)...\n", __func__,
- tty_name(tty), tty->count);
+ tty_debug(tty, "(tty count=%d)...\n", tty->count);
#endif
if (tty->ops->close)
@@ -1905,7 +1901,7 @@
return 0;
#ifdef TTY_DEBUG_HANGUP
- printk(KERN_DEBUG "%s: %s: final close\n", __func__, tty_name(tty));
+ tty_debug(tty, "final close\n");
#endif
/*
* Ask the line discipline code to release its structures
@@ -1916,8 +1912,7 @@
tty_flush_works(tty);
#ifdef TTY_DEBUG_HANGUP
- printk(KERN_DEBUG "%s: %s: freeing structure...\n", __func__,
- tty_name(tty));
+ tty_debug(tty, "freeing structure...\n");
#endif
/*
* The release_tty function takes care of the details of clearing
@@ -2108,8 +2103,7 @@
tty->driver->subtype == PTY_TYPE_MASTER)
noctty = 1;
#ifdef TTY_DEBUG_HANGUP
- printk(KERN_DEBUG "%s: %s: (tty count=%d)\n", __func__, tty->name,
- tty->count);
+ tty_debug(tty, "(tty count=%d)\n", tty->count);
#endif
if (tty->ops->open)
retval = tty->ops->open(tty, filp);
@@ -2119,8 +2113,7 @@
if (retval) {
#ifdef TTY_DEBUG_HANGUP
- printk(KERN_DEBUG "%s: %s: error %d, releasing...\n", __func__,
- tty->name, retval);
+ tty_debug(tty, "error %d, releasing...\n", retval);
#endif
tty_unlock(tty); /* need to call tty_release without BTM */
tty_release(inode, filp);