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tty: Remove TTY_HUPPING

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Now that tty_ldisc_hangup() does not drop the tty lock, it is no
longer possible to observe TTY_HUPPING while holding the tty lock
on another cpu.

Remove TTY_HUPPING bit definition.

Reviewed-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Hurley
2014-11-05 12:12:46 -05:00
committed by Greg Kroah-Hartman
parent c8483bc9de
commit 3ff51a199f
3 changed files with 2 additions and 14 deletions
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3
drivers/tty/tty_ldisc.c
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@@ -544,8 +544,7 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc)
old_ldisc = tty->ldisc;
if (test_bit(TTY_HUPPING, &tty->flags) ||
test_bit(TTY_HUPPED, &tty->flags)) {
if (test_bit(TTY_HUPPED, &tty->flags)) {
/* We were raced by the hangup method. It will have stomped
the ldisc data and closed the ldisc down */
tty_ldisc_enable_pair(tty, o_tty);