tty: Define ASYNC_ replacement bits

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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>

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Peter Hurley 2016-04-09 17:53:20 -07:00 • committed by Greg Kroah-Hartman

parent 97ef38b821

commit e4d38f334a

2 changed files with 23 additions and 2 deletions

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include/uapi/linux/tty_flags.h

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