linux-kernel - [RFC PATCH v2 6/6] um: console: Ignore console= option

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Message-Id: <149422453401.11101.10134259593903274581.stgit@devbox>
Date:   Mon,  8 May 2017 15:22:24 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Jeff Dike <jdike@...toit.com>, Richard Weinberger <richard@....at>
Cc:     Masami Hiramatsu <mhiramat@...nel.org>,
        user-mode-linux-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org
Subject: [RFC PATCH v2 6/6] um: console: Ignore console= option

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 <mhiramat@...nel.org>
---
 arch/um/drivers/stdio_console.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/um/drivers/stdio_console.c b/arch/um/drivers/stdio_console.c
index 7b361f3..c90817b 100644
--- a/arch/um/drivers/stdio_console.c
+++ b/arch/um/drivers/stdio_console.c
@@ -192,6 +192,9 @@ __uml_exitcall(console_exit);
 
 static int console_chan_setup(char *str)
 {
+	if (!strncmp(str, "sole=", 5))	/* console= option specifies tty */
+		return 0;
+
 	line_setup(vt_conf, MAX_TTYS, &def_conf, str, "console");
 	return 1;
 }