linux-kernel - [PATCH 6/6] um: remove count

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Message-Id: <1338841657-30358-7-git-send-email-richard@nod.at>
Date:	Mon,  4 Jun 2012 22:27:37 +0200
From:	Richard Weinberger <richard@....at>
To:	jslaby@...e.cz
Cc:	user-mode-linux-devel@...ts.sourceforge.net,
	gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
	viro@...iv.linux.org.uk, alan@...ux.intel.com,
	Richard Weinberger <richard@....at>
Subject: [PATCH 6/6] um: remove count_lock

this lock is no longer needed.

Signed-off-by: Richard Weinberger <richard@....at>
---
 arch/um/drivers/line.c |    6 ------
 1 files changed, 0 insertions(+), 6 deletions(-)

diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c
index 95d5e78..555ccfc 100644
--- a/arch/um/drivers/line.c
+++ b/arch/um/drivers/line.c
@@ -382,8 +382,6 @@ int setup_one_line(struct line *lines, int n, char *init,
 	struct tty_driver *driver = line->driver->driver;
 	int err = -EINVAL;
 
-	mutex_lock(&line->count_lock);
-
 	if (line->port.count) {
 		*error_out = "Device is already open";
 		goto out;
@@ -425,7 +423,6 @@ int setup_one_line(struct line *lines, int n, char *init,
 		}
 	}
 out:
-	mutex_unlock(&line->count_lock);
 	return err;
 }
 
@@ -513,7 +510,6 @@ int line_get_config(char *name, struct line *lines, unsigned int num, char *str,
 
 	line = &lines[dev];
 
-	mutex_lock(&line->count_lock);
 	if (!line->valid)
 		CONFIG_CHUNK(str, size, n, "none", 1);
 	else {
@@ -525,7 +521,6 @@ int line_get_config(char *name, struct line *lines, unsigned int num, char *str,
 			tty_kref_put(tty);
 		}
 	}
-	mutex_unlock(&line->count_lock);
 
 	return n;
 }
@@ -578,7 +573,6 @@ int register_lines(struct line_driver *line_driver,
 		tty_port_init(&lines[i].port);
 		lines[i].port.ops = &line_port_ops;
 		spin_lock_init(&lines[i].lock);
-		mutex_init(&lines[i].count_lock);
 		lines[i].driver = line_driver;
 		INIT_LIST_HEAD(&lines[i].chan_list);
 	}
-- 
1.7.7.3

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