um: remove count_lock

this lock is no longer needed.

Signed-off-by: Richard Weinberger <richard@nod.at>

diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c
index 95d5e78..555ccfc 100644 (file)
--- 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);
        }

diff --git a/arch/um/drivers/line.h b/arch/um/drivers/line.h
index ad00f3e..bae9561 100644 (file)
--- a/arch/um/drivers/line.h
+++ b/arch/um/drivers/line.h
@@ -33,7 +33,6 @@ struct line_driver {
 
 struct line {
        struct tty_port port;
-       struct mutex count_lock;
        int valid;
 
        char *init_str;