serial: core: add comment about definitely used port types
authorWolfram Sang <wsa+renesas@sang-engineering.com>
Fri, 22 Sep 2023 06:36:42 +0000 (08:36 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 3 Oct 2023 12:57:12 +0000 (14:57 +0200)
commit00c77bcf2a624e6863121ea0eeb37e35c58ca5d0
tree0f381dc2c9268944040c58cec7563ddff804d0bc
parentb02d006194938593373f189f8d0e84991e6949a2
serial: core: add comment about definitely used port types

When port type 18 was removed, it was deduced that the code could go but
its define has to stay because it is used in userspace. Share that
knowledge by adding a comment about it.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20230922063642.4120-3-wsa+renesas@sang-engineering.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
include/uapi/linux/serial_core.h