linux-kernel - [PATCH 1/2] RISC-V: Remove duplicate command-line parsing logic

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Date:   Fri,  5 Jan 2018 15:35:48 -0800
From:   Palmer Dabbelt <palmer@...ive.com>
To:     linux-kernel@...r.kernel.org
Cc:     patches@...ups.riscv.org, Michael Clark <mjc@...ive.com>,
        Palmer Dabbelt <palmer@...ive.com>
Subject: [PATCH 1/2] RISC-V: Remove duplicate command-line parsing logic

From: Michael Clark <mjc@...ive.com>

builtin_cmdline handling is present in drivers/of/fdt.c so the
duplicate logic in arch/riscv/setup.c results in duplication of
the builtin command line. e.g. CONFIG_CMDLINE="root=/dev/vda ro"
gets appended twice and gives "root=/dev/vda ro root=/dev/vda ro"

Before this patch:

[    0.000000] Kernel command line: root=/dev/vda ro root=/dev/vda ro

After this patch:

[    0.000000] Kernel command line: root=/dev/vda ro

Signed-off-by: Michael Clark <mjc@...ive.com>
Signed-off-by: Palmer Dabbelt <palmer@...ive.com>
---
 arch/riscv/kernel/setup.c | 16 ----------------
 1 file changed, 16 deletions(-)

diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c
index cb7b0c63014e..a548ccf48024 100644
--- a/arch/riscv/kernel/setup.c
+++ b/arch/riscv/kernel/setup.c
@@ -49,10 +49,6 @@ struct screen_info screen_info = {
 };
 #endif
 
-#ifdef CONFIG_CMDLINE_BOOL
-static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE;
-#endif /* CONFIG_CMDLINE_BOOL */
-
 unsigned long va_pa_offset;
 EXPORT_SYMBOL(va_pa_offset);
 unsigned long pfn_base;
@@ -208,18 +204,6 @@ static void __init setup_bootmem(void)
 
 void __init setup_arch(char **cmdline_p)
 {
-#ifdef CONFIG_CMDLINE_BOOL
-#ifdef CONFIG_CMDLINE_OVERRIDE
-	strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
-#else
-	if (builtin_cmdline[0] != '\0') {
-		/* Append bootloader command line to built-in */
-		strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE);
-		strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE);
-		strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
-	}
-#endif /* CONFIG_CMDLINE_OVERRIDE */
-#endif /* CONFIG_CMDLINE_BOOL */
 	*cmdline_p = boot_command_line;
 
 	parse_early_param();
-- 
2.13.6