kernel/linux.git/arch/um/drivers/stdio_console.c, branch v6.18.21

um: Do not initialise statics to 0.

2022-09-19T21:10:07+00:00

do not initialise statics to 0. Signed-off-by: Xin Gao Signed-off-by: Richard Weinberger

um: line: Use separate IRQs per line

2022-05-27T07:03:41+00:00

Today, all possible serial lines (ssl*=) as well as all possible consoles (con*=) each share a single interrupt (with a fixed number) with others of the same type. Now, if you have two lines, say ssl0 and ssl1, and one of them is connected to an fd you cannot read (e.g. a file), but the other gets a read interrupt, then both of them get the interrupt since it's shared. Then, the read() call will return EOF, since it's a file being written and there's nothing to read (at least not at the current offset, at the end). Unfortunately, this is treated as a read error, and we close this line, losing all the possible output. It might be possible to work around this and make the IRQ sharing work, however, now that we have dynamically allocated IRQs that are easy to use, simply use that to achieve separating between the events; then there's no interrupt for that line and we never attempt the read in the first place, thus not closing the line. This manifested itself in the wifi hostap/hwsim tests where the parallel script communicates via one serial console and the kernel messages go to another (a file) and sending data on the communication console caused the kernel messages to stop flowing into the file. Reported-by: Jouni Malinen Signed-off-by: Johannes Berg Acked-By: anton ivanov Signed-off-by: Richard Weinberger

tty: remove empty tty_operations::set_termios

2021-05-13T16:29:11+00:00

tty_operations::set_termios is optional. If it doesn't exist, nothing is called. So remove almost¹ empty set_termios implementations. ¹ capi had an useless pr_debug in it. Signed-off-by: Jiri Slaby Cc: Jeff Dike Cc: Richard Weinberger Cc: Karsten Keil Acked-By: Anton Ivanov Link: https://lore.kernel.org/r/20210505091928.22010-32-jslaby@suse.cz Signed-off-by: Greg Kroah-Hartman

um: line, remove put_char

2020-06-24T14:53:37+00:00

um's put_char only calls write. And the tty layer/disciplines do the same if put_char is NULL. So we can safely remove this put_char wrapper. Signed-off-by: Jiri Slaby Cc: Jeff Dike Cc: Richard Weinberger Cc: Anton Ivanov Link: https://lore.kernel.org/r/20200615074856.18949-1-jslaby@suse.cz Signed-off-by: Greg Kroah-Hartman

um: Add SPDX headers for files in arch/um/drivers

2019-09-15T19:37:16+00:00

Convert files to use SPDX header. All files are licensed under the GPLv2. Signed-off-by: Alex Dewar Signed-off-by: Richard Weinberger

um: console: Ignore console= option

2017-07-05T21:18:48+00:00

Ignore linux kernel's console= option at uml's console option handler. Since uml's con= option is only for setting up new console, and Linux kernel's console= option specify to which console kernel output its message, we can use both option for different purpose. Signed-off-by: Masami Hiramatsu Signed-off-by: Richard Weinberger

um: Use tty_port_operations->destruct

2013-03-11T09:08:03+00:00

As we setup the SIGWINCH handler in tty_port_operations->activate it makes sense to tear down it in ->destruct. Signed-off-by: Richard Weinberger

um: get rid of pointless include "..." where include <...> will do

2012-10-09T20:28:45+00:00

Signed-off-by: Al Viro Signed-off-by: Richard Weinberger

um: fully use tty_port

2012-07-28T15:47:59+00:00

... use all tty_port helpers Signed-off-by: Richard Weinberger

um: remove line_ioctl()

2012-07-28T15:47:58+00:00

line_ioctl() has no real function. Signed-off-by: Richard Weinberger