Re: [PATCH v11 1/5] x86/setup: introduce setup_bultin_cmdline

Andy Shevchenko
2015-06-09T15:33:07Z

On Tue, 2015-06-09 at 17:11 +0600, Alexander Kuleshov wrote:
> This patch introduces the setup_builtin_cmdline function which appends or
> overrides boot_command_line with the builtin_cmdline if CONFIG_CMDLINE_BOOL
> is set.

> Previously this functional was in the setup_arch, but we need to move
> it for getting actual command line as early as possible in the
> arch/x86/kernel/head{32,64}.c for the earlyprintk setup.

This paragraph not related to the changes in the patch. So, remove it or
replace by something like "The patch is a preparation for further
improvements".

>
> Signed-off-by: Alexander Kuleshov <kuleshovmail@gmail.com>
> ---
> arch/x86/include/asm/setup.h | 1 +
> arch/x86/kernel/setup.c | 30 +++++++++++++++++-------------
> 2 files changed, 18 insertions(+), 13 deletions(-)
>
> diff --git a/arch/x86/include/asm/setup.h b/arch/x86/include/asm/setup.h
> index f69e06b..59efd0d 100644
> --- a/arch/x86/include/asm/setup.h
> +++ b/arch/x86/include/asm/setup.h
> @@ -119,6 +119,7 @@ asmlinkage void __init x86_64_start_kernel(char *real_mode);
> asmlinkage void __init x86_64_start_reservations(char *real_mode_data);
>
> #endif /* __i386__ */
> +void __init setup_builtin_cmdline(void);
> #endif /* _SETUP */
> #else
> #define RESERVE_BRK(name,sz) \
> diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
> index d74ac33..edd4857 100644
> --- a/arch/x86/kernel/setup.c
> +++ b/arch/x86/kernel/setup.c
> @@ -845,6 +845,22 @@ dump_kernel_offset(struct notifier_block *self, unsigned long v, void *p)
> return 0;
> }
>
> +void __init setup_builtin_cmdline(void)
> +{
> +#ifdef CONFIG_CMDLINE_BOOL
> +#ifdef CONFIG_CMDLINE_OVERRIDE
> + strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
> +#else
> + if (builtin_cmdline[0]) {
> + /* append boot loader cmdline to builtin */
> + 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
> +#endif
> +}
> +
> /*
> * Determine if we were loaded by an EFI loader. If so, then we have also been
> * passed the efi memmap, systab, etc., so we should use these data structures
> @@ -973,19 +989,7 @@ void __init setup_arch(char **cmdline_p)
> bss_resource.start = __pa_symbol(__bss_start);
> bss_resource.end = __pa_symbol(__bss_stop)-1;
>
> -#ifdef CONFIG_CMDLINE_BOOL
> -#ifdef CONFIG_CMDLINE_OVERRIDE
> - strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
> -#else
> - if (builtin_cmdline[0]) {
> - /* append boot loader cmdline to builtin */
> - 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
> -#endif
> -
> + setup_builtin_cmdline();
> strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
> *cmdline_p = command_line;
>

--
Andy Shevchenko <andriy.shevchenko@intel.com>
Intel Finland Oy