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authorVictor Boivie <victor.boivie@sonyericsson.com>2011-05-04 17:07:55 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2011-05-12 10:13:22 +0100
commit4394c1244249198c6b85093d46935b761b36ae05 (patch)
tree3a0c30dc915b85ee5b2190eaa3ed2c6ad530aab0 /arch/arm/kernel/setup.c
parentc1b0db56604b4ccc55a325104b14093aeedeb829 (diff)
ARM: 6893/1: Allow for kernel command line concatenation
This patch allows the provided CONFIG_CMDLINE to be concatenated with the one provided by the boot loader. This is useful to merge the static values defined in CONFIG_CMDLINE with the boot loader's (possibly) more dynamic values, such as startup reasons and more. Signed-off-by: Victor Boivie <victor.boivie@sonyericsson.com> Reviewed-by: Bjorn Andersson <bjorn.andersson@sonyericsson.com> Signed-off-by: Oskar Andero <oskar.andero@sonyericsson.com> Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org> Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/kernel/setup.c')
-rw-r--r--arch/arm/kernel/setup.c13
1 files changed, 9 insertions, 4 deletions
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 006c1e884eaf..6dce209a623b 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -672,11 +672,16 @@ __tagtable(ATAG_REVISION, parse_tag_revision);
static int __init parse_tag_cmdline(const struct tag *tag)
{
-#ifndef CONFIG_CMDLINE_FORCE
- strlcpy(default_command_line, tag->u.cmdline.cmdline, COMMAND_LINE_SIZE);
-#else
+#if defined(CONFIG_CMDLINE_EXTEND)
+ strlcat(default_command_line, " ", COMMAND_LINE_SIZE);
+ strlcat(default_command_line, tag->u.cmdline.cmdline,
+ COMMAND_LINE_SIZE);
+#elif defined(CONFIG_CMDLINE_FORCE)
pr_warning("Ignoring tag cmdline (using the default kernel command line)\n");
-#endif /* CONFIG_CMDLINE_FORCE */
+#else
+ strlcpy(default_command_line, tag->u.cmdline.cmdline,
+ COMMAND_LINE_SIZE);
+#endif
return 0;
}