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| author | Jiri Slaby <jslaby@suse.cz> | 2011-07-14 16:35:13 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-08-23 21:34:06 +0400 |
| commit | eff4b0b9fe37873d3dc7ade0e08e6f0f89279b8b (patch) | |
| tree | 85b245dbe8b2dd6ae6eb79a883223bf5e34b0bb6 /drivers | |
| parent | 6a3e492b6daaf7ec4dc41e51d87d2aae8ff886f2 (diff) | |
| download | linux-eff4b0b9fe37873d3dc7ade0e08e6f0f89279b8b.tar.xz | |
TTY: ami_serial, remove BTM from wait_until_sent
The same as in "TTY: serial, remove BTM from wait_until_sent" we don't
need to take BTM in wait_until_sent of ami_serial. Exactly the same
as serial, ami_serial accesses some "info" members (xmit_fifo_size,
timeout), but their assignment on other places in the code is not
protected by BTM anyway.
So the BTM protects nothing here. This removal helps us to get rid of
tty_locked() and __big_tty_mutex_owner in the following patch. This
was suggested by Arnd.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: Alan Cox <alan@linux.intel.com>
Cc: Andreas Bombe <aeb@debian.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/tty/amiserial.c | 10 |
1 files changed, 1 insertions, 9 deletions
diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c index 220579592c20..6d43f550b549 100644 --- a/drivers/tty/amiserial.c +++ b/drivers/tty/amiserial.c @@ -1529,7 +1529,6 @@ static void rs_wait_until_sent(struct tty_struct *tty, int timeout) { struct async_struct * info = tty->driver_data; unsigned long orig_jiffies, char_time; - int tty_was_locked = tty_locked(); int lsr; if (serial_paranoia_check(info, tty->name, "rs_wait_until_sent")) @@ -1541,12 +1540,6 @@ static void rs_wait_until_sent(struct tty_struct *tty, int timeout) orig_jiffies = jiffies; /* - * tty_wait_until_sent is called from lots of places, - * with or without the BTM. - */ - if (!tty_was_locked) - tty_lock(); - /* * Set the check interval to be 1/5 of the estimated time to * send a single character, and make it at least 1. The check * interval should also be less than the timeout. @@ -1586,8 +1579,7 @@ static void rs_wait_until_sent(struct tty_struct *tty, int timeout) break; } __set_current_state(TASK_RUNNING); - if (!tty_was_locked) - tty_unlock(); + #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies); #endif |