Messages in this thread Patch in this message | | | From | Alexander Kuleshov <> | Subject | [PATCH v8 1/3] x86/setup: introduce setup_bultin_cmdline | Date | Tue, 26 May 2015 19:07:25 +0600 |
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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.
Signed-off-by: Alexander Kuleshov <kuleshovmail@gmail.com> --- arch/x86/include/asm/setup.h | 1 + arch/x86/kernel/setup.c | 34 +++++++++++++++++++--------------- 2 files changed, 20 insertions(+), 15 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..28dea1c 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -733,7 +733,7 @@ static void __init trim_snb_memory(void) * already been reserved. */ memblock_reserve(0, 1<<20); - + for (i = 0; i < ARRAY_SIZE(bad_pages); i++) { if (memblock_reserve(bad_pages[i], PAGE_SIZE)) printk(KERN_WARNING "failed to reserve 0x%08lx\n", @@ -825,7 +825,7 @@ static void __init trim_low_memory_range(void) { memblock_reserve(0, ALIGN(reserve_low, PAGE_SIZE)); } - + /* * Dump out kernel offset information on panic. */ @@ -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; -- 2.4.0.350.g9532ead
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