From e09b41010ba33a20a87472ee821fa407a5b8da36 Mon Sep 17 00:00:00 2001 From: José Pekkarinen Date: Mon, 11 Apr 2016 10:41:07 +0300 Subject: These changes are the raw update to linux-4.4.6-rt14. Kernel sources are taken from kernel.org, and rt patch from the rt wiki download page. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit During the rebasing, the following patch collided: Force tick interrupt and get rid of softirq magic(I70131fb85). Collisions have been removed because its logic was found on the source already. Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769 Signed-off-by: José Pekkarinen --- kernel/drivers/hwtracing/stm/console.c | 80 ++++++++++++++++++++++++++++++++++ 1 file changed, 80 insertions(+) create mode 100644 kernel/drivers/hwtracing/stm/console.c (limited to 'kernel/drivers/hwtracing/stm/console.c') diff --git a/kernel/drivers/hwtracing/stm/console.c b/kernel/drivers/hwtracing/stm/console.c new file mode 100644 index 000000000..c9d9a8d2f --- /dev/null +++ b/kernel/drivers/hwtracing/stm/console.c @@ -0,0 +1,80 @@ +/* + * Simple kernel console driver for STM devices + * Copyright (c) 2014, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * STM console will send kernel messages over STM devices to a trace host. + */ + +#include +#include +#include +#include +#include + +static int stm_console_link(struct stm_source_data *data); +static void stm_console_unlink(struct stm_source_data *data); + +static struct stm_console { + struct stm_source_data data; + struct console console; +} stm_console = { + .data = { + .name = "console", + .nr_chans = 1, + .link = stm_console_link, + .unlink = stm_console_unlink, + }, +}; + +static void +stm_console_write(struct console *con, const char *buf, unsigned len) +{ + struct stm_console *sc = container_of(con, struct stm_console, console); + + stm_source_write(&sc->data, 0, buf, len); +} + +static int stm_console_link(struct stm_source_data *data) +{ + struct stm_console *sc = container_of(data, struct stm_console, data); + + strcpy(sc->console.name, "stm_console"); + sc->console.write = stm_console_write; + sc->console.flags = CON_ENABLED | CON_PRINTBUFFER; + register_console(&sc->console); + + return 0; +} + +static void stm_console_unlink(struct stm_source_data *data) +{ + struct stm_console *sc = container_of(data, struct stm_console, data); + + unregister_console(&sc->console); +} + +static int stm_console_init(void) +{ + return stm_source_register_device(NULL, &stm_console.data); +} + +static void stm_console_exit(void) +{ + stm_source_unregister_device(&stm_console.data); +} + +module_init(stm_console_init); +module_exit(stm_console_exit); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("stm_console driver"); +MODULE_AUTHOR("Alexander Shishkin "); -- cgit 1.2.3-korg