linux-kernel - [PATCH v3 1/4] MIPS: Lonngson64: Copy kernel command line from arcs

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Message-Id: <20171115031155.643-1-jiaxun.yang@flygoat.com>
Date:   Wed, 15 Nov 2017 11:11:52 +0800
From:   Jiaxun Yang <jiaxun.yang@...goat.com>
To:     Ralf Baechle <ralf@...ux-mips.org>
Cc:     linux-mips@...ux-mips.org, linux-kernel@...r.kernel.org,
        Jiaxun Yang <jiaxun.yang@...goat.com>
Subject: [PATCH v3 1/4] MIPS: Lonngson64: Copy kernel command line from arcs_cmdline

Since lemote-2f/marchtype.c need to get cmdline from loongson.h
this patch simply copy kernel command line from arcs_cmdline
to fix that issue.

Signed-off-by: Jiaxun Yang <jiaxun.yang@...goat.com>
---
 arch/mips/include/asm/mach-loongson64/loongson.h | 6 ++++++
 arch/mips/loongson64/common/cmdline.c            | 7 +++++++
 2 files changed, 13 insertions(+)

diff --git a/arch/mips/include/asm/mach-loongson64/loongson.h b/arch/mips/include/asm/mach-loongson64/loongson.h
index c68c0cc879c6..1edf3a484e6a 100644
--- a/arch/mips/include/asm/mach-loongson64/loongson.h
+++ b/arch/mips/include/asm/mach-loongson64/loongson.h
@@ -45,6 +45,12 @@ static inline void prom_init_uart_base(void)
 #endif
 }
 
+/*
+ * Copy kernel command line from arcs_cmdline
+ */
+#include <asm/setup.h>
+extern char loongson_cmdline[COMMAND_LINE_SIZE];
+
 /* irq operation functions */
 extern void bonito_irqdispatch(void);
 extern void __init bonito_irq_init(void);
diff --git a/arch/mips/loongson64/common/cmdline.c b/arch/mips/loongson64/common/cmdline.c
index 01fbed137028..49e172184e15 100644
--- a/arch/mips/loongson64/common/cmdline.c
+++ b/arch/mips/loongson64/common/cmdline.c
@@ -21,6 +21,11 @@
 
 #include <loongson.h>
 
+/* the kernel command line copied from arcs_cmdline */
+#include <linux/export.h>
+char loongson_cmdline[COMMAND_LINE_SIZE];
+EXPORT_SYMBOL(loongson_cmdline);
+
 void __init prom_init_cmdline(void)
 {
 	int prom_argc;
@@ -45,4 +50,6 @@ void __init prom_init_cmdline(void)
 	}
 
 	prom_init_machtype();
+	/* copy arcs_cmdline into loongson_cmdline */
+	strncpy(loongson_cmdline, arcs_cmdline, COMMAND_LINE_SIZE);
 }
-- 
2.14.1