From 00c77bcf2a624e6863121ea0eeb37e35c58ca5d0 Mon Sep 17 00:00:00 2001 From: Wolfram Sang Date: Fri, 22 Sep 2023 08:36:42 +0200 Subject: [PATCH] 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 Link: https://lore.kernel.org/r/20230922063642.4120-3-wsa+renesas@sang-engineering.com Signed-off-by: Greg Kroah-Hartman --- include/uapi/linux/serial_core.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/uapi/linux/serial_core.h b/include/uapi/linux/serial_core.h index 92e3dd56f6316..46e06c4838999 100644 --- a/include/uapi/linux/serial_core.h +++ b/include/uapi/linux/serial_core.h @@ -11,6 +11,8 @@ * The type definitions. These are from Ted Ts'o's serial.h * By historical reasons the values from 0 to 13 are defined * in the include/uapi/linux/serial.h, do not define them here. + * Values 0 to 19 are used by setserial from busybox and must never + * be modified. */ #define PORT_NS16550A 14 #define PORT_XSCALE 15 -- 2.47.2