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Subject[PATCH] loongarch: Fix broken CONFIG_CMDLINE
Date
From e00182944fee67301c3ebade3147b25d9f1555aa Mon Sep 17 00:00:00 2001
From: donmor <donmor3000@hotmail.com>
Date: Sat, 8 Jul 2023 10:45:21 +0800
Subject: [PATCH] loongarch: Fix broken CONFIG_CMDLINE

This patch tends to fix CONFIG_CMDLINE, which is not working with
CONFIG_CMDLINE_EXTEND or CONFIG_CMDLINE_BOOTLOADER. Some code is absent
in
arch/loongarch/kernel/setup.c, which should handle built-in command
lines
in CONFIG_CMDLINE. The absence of such code causes CONFIG_CMDLINE not
working if CONFIG_CMDLINE_EXTEND or CONFIG_CMDLINE_BOOTLOADER is set to
Y.
CONFIG_CMDLINE_FORCE is not affected.

Signed-off-by: donmor <donmor3000@hotmail.com>
---
arch/loongarch/kernel/setup.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)

diff --git a/arch/loongarch/kernel/setup.c
b/arch/loongarch/kernel/setup.c
index 78a00359bde3..dc6e01c340bb 100644
--- a/arch/loongarch/kernel/setup.c
+++ b/arch/loongarch/kernel/setup.c
@@ -335,6 +335,22 @@ static void __init bootcmdline_init(char
**cmdline_p)
}
#endif

+#ifdef CONFIG_CMDLINE
+ /*
+ * If CONFIG_CMDLINE_BOOTLOADER is enabled then we use the
built-in
+ * command line if no command line given, or we append given
command
+ * line to the built-in one if CONFIG_CMDLINE_EXTEND is
enabled.
+ */
+ if (IS_ENABLED(CONFIG_CMDLINE_EXTEND)) {
+ strscpy(boot_command_line, CONFIG_CMDLINE,
COMMAND_LINE_SIZE);
+ strlcat(boot_command_line, " ", COMMAND_LINE_SIZE);
+ strlcat(boot_command_line, init_command_line,
COMMAND_LINE_SIZE);
+ }
+
+ if (IS_ENABLED(CONFIG_CMDLINE_BOOTLOADER) &&
!boot_command_line[0])
+ strscpy(boot_command_line, CONFIG_CMDLINE,
COMMAND_LINE_SIZE);
+#endif
+
out:
*cmdline_p = boot_command_line;
}
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