linux-kernel - Re: [PATCH 01/28] c6x: use boot_command_line instead of private c6x_command

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Date:	Tue, 17 Sep 2013 22:07:29 -0500
From:	Grant Likely <grant.likely@...aro.org>
To:	Rob Herring <robherring2@...il.com>, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org
Cc:	Rob Herring <rob.herring@...xeda.com>,
	Mark Salter <msalter@...hat.com>,
	Aurelien Jacquiot <a-jacquiot@...com>,
	linux-c6x-dev@...ux-c6x.org
Subject: Re: [PATCH 01/28] c6x: use boot_command_line instead of private c6x_command_line

On Mon, 16 Sep 2013 18:08:57 -0500, Rob Herring <robherring2@...il.com> wrote:
> From: Rob Herring <rob.herring@...xeda.com>
> 
> Save some pointless copying of the kernel command line and just use
> boot_command_line instead.
> 
> Also remove default_command_line as it is not referenced anywhere, and
> the DT code already handles the default command line.
> 
> Signed-off-by: Rob Herring <rob.herring@...xeda.com>
> Cc: Mark Salter <msalter@...hat.com>
> Cc: Aurelien Jacquiot <a-jacquiot@...com>
> Cc: linux-c6x-dev@...ux-c6x.org

This and the next patch look good to me.

Reviewed-by: Grant Likely <grant.likely@...aro.org>

> ---
>  arch/c6x/include/asm/setup.h |  2 --
>  arch/c6x/kernel/devicetree.c |  2 +-
>  arch/c6x/kernel/setup.c      | 11 +----------
>  3 files changed, 2 insertions(+), 13 deletions(-)
> 
> diff --git a/arch/c6x/include/asm/setup.h b/arch/c6x/include/asm/setup.h
> index ecead15..6968044 100644
> --- a/arch/c6x/include/asm/setup.h
> +++ b/arch/c6x/include/asm/setup.h
> @@ -14,8 +14,6 @@
>  #include <uapi/asm/setup.h>
>  
>  #ifndef __ASSEMBLY__
> -extern char c6x_command_line[COMMAND_LINE_SIZE];
> -
>  extern int c6x_add_memory(phys_addr_t start, unsigned long size);
>  
>  extern unsigned long ram_start;
> diff --git a/arch/c6x/kernel/devicetree.c b/arch/c6x/kernel/devicetree.c
> index 9e15ab9..5e8c838 100644
> --- a/arch/c6x/kernel/devicetree.c
> +++ b/arch/c6x/kernel/devicetree.c
> @@ -24,7 +24,7 @@ void __init early_init_devtree(void *params)
>  	 * device-tree, including the platform type, initrd location and
>  	 * size and more ...
>  	 */
> -	of_scan_flat_dt(early_init_dt_scan_chosen, c6x_command_line);
> +	of_scan_flat_dt(early_init_dt_scan_chosen, boot_command_line);
>  
>  	/* Scan memory nodes and rebuild MEMBLOCKs */
>  	of_scan_flat_dt(early_init_dt_scan_root, NULL);
> diff --git a/arch/c6x/kernel/setup.c b/arch/c6x/kernel/setup.c
> index f4e72bd..0e5a812 100644
> --- a/arch/c6x/kernel/setup.c
> +++ b/arch/c6x/kernel/setup.c
> @@ -68,13 +68,6 @@ unsigned long ram_end;
>  static unsigned long dma_start __initdata;
>  static unsigned long dma_size __initdata;
>  
> -char c6x_command_line[COMMAND_LINE_SIZE];
> -
> -#if defined(CONFIG_CMDLINE_BOOL)
> -static const char default_command_line[COMMAND_LINE_SIZE] __section(.cmdline) =
> -	CONFIG_CMDLINE;
> -#endif
> -
>  struct cpuinfo_c6x {
>  	const char *cpu_name;
>  	const char *cpu_voltage;
> @@ -296,8 +289,6 @@ notrace void __init machine_init(unsigned long dt_ptr)
>  	/* Do some early initialization based on the flat device tree */
>  	early_init_devtree(fdt);
>  
> -	/* parse_early_param needs a boot_command_line */
> -	strlcpy(boot_command_line, c6x_command_line, COMMAND_LINE_SIZE);
>  	parse_early_param();
>  }
>  
> @@ -309,7 +300,7 @@ void __init setup_arch(char **cmdline_p)
>  	printk(KERN_INFO "Initializing kernel\n");
>  
>  	/* Initialize command line */
> -	*cmdline_p = c6x_command_line;
> +	*cmdline_p = boot_command_line;
>  
>  	memory_end = ram_end;
>  	memory_end &= ~(PAGE_SIZE - 1);
> -- 
> 1.8.1.2
> 

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