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From:   Christophe Leroy <christophe.leroy@csgroup.eu>
Subject: [PATCH v4 12/20] nios2: Convert to GENERIC_CMDLINE
To:     will@kernel.org, danielwa@cisco.com, robh@kernel.org,
        daniel@gimpelevich.san-francisco.ca.us, arnd@kernel.org,
        akpm@linux-foundation.org
Cc:     linux-arch@vger.kernel.org, devicetree@vger.kernel.org,
        linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
        linuxppc-dev@lists.ozlabs.org,
        linux-arm-kernel@lists.infradead.org,
        microblaze <monstr@monstr.eu>, linux-mips@vger.kernel.org,
        nios2 <ley.foon.tan@intel.com>, openrisc@lists.librecores.org,
        linux-hexagon@vger.kernel.org, linux-riscv@lists.infradead.org,
        x86@kernel.org, linux-xtensa@linux-xtensa.org,
        linux-sh@vger.kernel.org, sparclinux@vger.kernel.org,
        linux-mm@kvack.org
Date:   Fri,  2 Apr 2021 15:18:13 +0000 (UTC)
Precedence: bulk

This converts the architecture to GENERIC_CMDLINE.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
v4: Added missing selection of CONFIG_GENERIC_CMDLINE in Kconfig
---
 arch/nios2/Kconfig        | 25 ++-----------------------
 arch/nios2/kernel/setup.c | 13 ++++---------
 2 files changed, 6 insertions(+), 32 deletions(-)

diff --git a/arch/nios2/Kconfig b/arch/nios2/Kconfig
index c24955c81c92..6018f3d626f8 100644
--- a/arch/nios2/Kconfig
+++ b/arch/nios2/Kconfig
@@ -10,6 +10,7 @@ config NIOS2
 	select COMMON_CLK
 	select TIMER_OF
 	select GENERIC_ATOMIC64
+	select GENERIC_CMDLINE
 	select GENERIC_CPU_DEVICES
 	select GENERIC_IRQ_PROBE
 	select GENERIC_IRQ_SHOW
@@ -90,31 +91,9 @@ config NIOS2_ALIGNMENT_TRAP
 
 comment "Boot options"
 
-config CMDLINE_BOOL
-	bool "Default bootloader kernel arguments"
-	default y
-
-config CMDLINE
-	string "Default kernel command string"
-	default ""
-	depends on CMDLINE_BOOL
-	help
-	  On some platforms, there is currently no way for the boot loader to
-	  pass arguments to the kernel. For these platforms, you can supply
-	  some command-line options at build time by entering them here.  In
-	  other cases you can specify kernel args so that you don't have
-	  to set them up in board prom initialization routines.
-
-config CMDLINE_FORCE
-	bool "Force default kernel command string"
-	depends on CMDLINE_BOOL
-	help
-	  Set this to have arguments from the default kernel command string
-	  override those passed by the boot loader.
-
 config NIOS2_CMDLINE_IGNORE_DTB
 	bool "Ignore kernel command string from DTB"
-	depends on CMDLINE_BOOL
+	depends on CMDLINE != ""
 	depends on !CMDLINE_FORCE
 	default y
 	help
diff --git a/arch/nios2/kernel/setup.c b/arch/nios2/kernel/setup.c
index d2f21957e99c..5b38d3d0ad64 100644
--- a/arch/nios2/kernel/setup.c
+++ b/arch/nios2/kernel/setup.c
@@ -20,6 +20,7 @@
 #include <linux/initrd.h>
 #include <linux/of_fdt.h>
 #include <linux/screen_info.h>
+#include <linux/cmdline.h>
 
 #include <asm/mmu_context.h>
 #include <asm/sections.h>
@@ -108,7 +109,7 @@ asmlinkage void __init nios2_boot_init(unsigned r4, unsigned r5, unsigned r6,
 				       unsigned r7)
 {
 	unsigned dtb_passed = 0;
-	char cmdline_passed[COMMAND_LINE_SIZE] __maybe_unused = { 0, };
+	char cmdline_passed[COMMAND_LINE_SIZE] = { 0, };
 
 #if defined(CONFIG_NIOS2_PASS_CMDLINE)
 	if (r4 == 0x534f494e) { /* r4 is magic NIOS */
@@ -127,14 +128,8 @@ asmlinkage void __init nios2_boot_init(unsigned r4, unsigned r5, unsigned r6,
 
 	early_init_devtree((void *)dtb_passed);
 
-#ifndef CONFIG_CMDLINE_FORCE
-	if (cmdline_passed[0])
-		strlcpy(boot_command_line, cmdline_passed, COMMAND_LINE_SIZE);
-#ifdef CONFIG_NIOS2_CMDLINE_IGNORE_DTB
-	else
-		strlcpy(boot_command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
-#endif
-#endif
+	if (cmdline_passed[0] || IS_ENABLED(CONFIG_NIOS2_CMDLINE_IGNORE_DTB))
+		cmdline_build(boot_command_line, cmdline_passed);
 
 	parse_early_param();
 }
-- 
2.25.0