linux-kernel - [PATCH 12/14] tty: Remove __func__ from tty

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Date:	Sun,  8 Nov 2015 13:01:19 -0500
From:	Peter Hurley <peter@...leysoftware.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Jiri Slaby <jslaby@...e.cz>, linux-kernel@...r.kernel.org,
	Peter Hurley <peter@...leysoftware.com>
Subject: [PATCH 12/14] tty: Remove __func__ from tty_debug() macro

Now that tty_debug() macro uses pr_debug(), the function name can
be printed when using dynamic debug; printing the function name within
the format string is redundant.

Remove the __func__ parameter and print specifier from the format string.
Add context to messages for when the function name is not printed by
dynamic debug, or when dynamic debug is not enabled.

Signed-off-by: Peter Hurley <peter@...leysoftware.com>
---
 drivers/tty/pty.c       |  2 +-
 drivers/tty/tty_io.c    | 14 +++++++-------
 drivers/tty/tty_ioctl.c |  2 +-
 include/linux/tty.h     |  3 +--
 4 files changed, 10 insertions(+), 11 deletions(-)

diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c
index a45660f..b311004 100644
--- a/drivers/tty/pty.c
+++ b/drivers/tty/pty.c
@@ -788,7 +788,7 @@ static int ptmx_open(struct inode *inode, struct file *filp)
 	if (retval)
 		goto err_release;
 
-	tty_debug_hangup(tty, "(tty count=%d)\n", tty->count);
+	tty_debug_hangup(tty, "opening (count=%d)\n", tty->count);
 
 	tty_unlock(tty);
 	return 0;
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 04e8b56..479e9c2 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -783,7 +783,7 @@ static void do_tty_hangup(struct work_struct *work)
 
 void tty_hangup(struct tty_struct *tty)
 {
-	tty_debug_hangup(tty, "\n");
+	tty_debug_hangup(tty, "hangup\n");
 	schedule_work(&tty->hangup_work);
 }
 
@@ -800,7 +800,7 @@ EXPORT_SYMBOL(tty_hangup);
 
 void tty_vhangup(struct tty_struct *tty)
 {
-	tty_debug_hangup(tty, "\n");
+	tty_debug_hangup(tty, "vhangup\n");
 	__tty_hangup(tty, 0);
 }
 
@@ -837,7 +837,7 @@ void tty_vhangup_self(void)
 
 static void tty_vhangup_session(struct tty_struct *tty)
 {
-	tty_debug_hangup(tty, "\n");
+	tty_debug_hangup(tty, "session hangup\n");
 	__tty_hangup(tty, 1);
 }
 
@@ -1783,7 +1783,7 @@ int tty_release(struct inode *inode, struct file *filp)
 		return 0;
 	}
 
-	tty_debug_hangup(tty, "(tty count=%d)...\n", tty->count);
+	tty_debug_hangup(tty, "releasing (count=%d)\n", tty->count);
 
 	if (tty->ops->close)
 		tty->ops->close(tty, filp);
@@ -1899,7 +1899,7 @@ int tty_release(struct inode *inode, struct file *filp)
 	/* Wait for pending work before tty destruction commmences */
 	tty_flush_works(tty);
 
-	tty_debug_hangup(tty, "freeing structure...\n");
+	tty_debug_hangup(tty, "freeing structure\n");
 	/*
 	 * The release_tty function takes care of the details of clearing
 	 * the slots and preserving the termios structure. The tty_unlock_pair
@@ -2089,7 +2089,7 @@ retry_open:
 	    tty->driver->subtype == PTY_TYPE_MASTER)
 		noctty = 1;
 
-	tty_debug_hangup(tty, "(tty count=%d)\n", tty->count);
+	tty_debug_hangup(tty, "opening (count=%d)\n", tty->count);
 
 	if (tty->ops->open)
 		retval = tty->ops->open(tty, filp);
@@ -2098,7 +2098,7 @@ retry_open:
 	filp->f_flags = saved_flags;
 
 	if (retval) {
-		tty_debug_hangup(tty, "error %d, releasing...\n", retval);
+		tty_debug_hangup(tty, "open error %d, releasing\n", retval);
 
 		tty_unlock(tty); /* need to call tty_release without BTM */
 		tty_release(inode, filp);
diff --git a/drivers/tty/tty_ioctl.c b/drivers/tty/tty_ioctl.c
index 6063912..b8c5c12 100644
--- a/drivers/tty/tty_ioctl.c
+++ b/drivers/tty/tty_ioctl.c
@@ -216,7 +216,7 @@ int tty_unthrottle_safe(struct tty_struct *tty)
 
 void tty_wait_until_sent(struct tty_struct *tty, long timeout)
 {
-	tty_debug_wait_until_sent(tty, "\n");
+	tty_debug_wait_until_sent(tty, "wait until sent, timeout=%ld\n", timeout);
 
 	if (!timeout)
 		timeout = MAX_SCHEDULE_TIMEOUT;
diff --git a/include/linux/tty.h b/include/linux/tty.h
index f578e84..f06dd7a 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -669,8 +669,7 @@ static inline void proc_tty_unregister_driver(struct tty_driver *d) {}
 #define tty_msg(fn, tty, f, ...) \
 	fn("%s %s: " f, tty_driver_name(tty), tty_name(tty), ##__VA_ARGS__)
 
-#define tty_debug(tty, f, ...) \
-		tty_msg(pr_debug, tty, "%s:" f, __func__, ##__VA_ARGS__)
+#define tty_debug(tty, f, ...)	tty_msg(pr_debug, tty, f, ##__VA_ARGS__)
 #define tty_info(tty, f, ...)	tty_msg(pr_info, tty, f, ##__VA_ARGS__)
 #define tty_notice(tty, f, ...)	tty_msg(pr_notice, tty, f, ##__VA_ARGS__)
 #define tty_warn(tty, f, ...)	tty_msg(pr_warn, tty, f, ##__VA_ARGS__)
-- 
2.6.3

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