tree 700de742e06c9ef1df41d6d79b59a91d095abb4d
parent 97ef38b8210d7459d4cb51668cdf3983772ac6b7
author Peter Hurley <peter@hurleysoftware.com> 1460249600 -0700
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1462033615 -0700

tty: Define ASYNC_ replacement bits

Prepare for relocating kernel private state bits out of tty_port::flags
field; tty_port::flags field is not atomic and can become corrupted
by concurrent updates. It also suffers from the complication of sharing
in a userspace-visible field which must be masked.

Define new tty_port::iflags field and new, substitute bit definitions
for the former ASYNC_* flags.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>