diff options
| -rw-r--r-- | arch/x86/platform/efi/efi.c | 22 | ||||
| -rw-r--r-- | include/linux/kernel.h | 1 | ||||
| -rw-r--r-- | lib/cmdline.c | 29 |
3 files changed, 32 insertions, 20 deletions
diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c index c90d3cd2728c..c73a7df5d37f 100644 --- a/arch/x86/platform/efi/efi.c +++ b/arch/x86/platform/efi/efi.c @@ -932,26 +932,8 @@ u64 efi_mem_attributes(unsigned long phys_addr) static int __init parse_efi_cmdline(char *str) { - if (*str == '=') - str++; - - while (*str) { - if (!strncmp(str, "old_map", 7)) { - set_bit(EFI_OLD_MEMMAP, &efi.flags); - str += strlen("old_map"); - } - - /* - * Skip any options we don't understand. Presumably - * they apply to the EFI boot stub. - */ - while (*str && *str != ',') - str++; - - /* If we hit a delimiter, skip it */ - if (*str == ',') - str++; - } + if (parse_option_str(str, "old_map")) + set_bit(EFI_OLD_MEMMAP, &efi.flags); return 0; } diff --git a/include/linux/kernel.h b/include/linux/kernel.h index 95624bed87ef..f66427ef0628 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -407,6 +407,7 @@ int vsscanf(const char *, const char *, va_list); extern int get_option(char **str, int *pint); extern char *get_options(const char *str, int nints, int *ints); extern unsigned long long memparse(const char *ptr, char **retptr); +extern bool parse_option_str(const char *str, const char *option); extern int core_kernel_text(unsigned long addr); extern int core_kernel_data(unsigned long addr); diff --git a/lib/cmdline.c b/lib/cmdline.c index 76a712e6e20e..8f13cf73c2ec 100644 --- a/lib/cmdline.c +++ b/lib/cmdline.c @@ -160,3 +160,32 @@ unsigned long long memparse(const char *ptr, char **retptr) return ret; } EXPORT_SYMBOL(memparse); + +/** + * parse_option_str - Parse a string and check an option is set or not + * @str: String to be parsed + * @option: option name + * + * This function parses a string containing a comma-separated list of + * strings like a=b,c. + * + * Return true if there's such option in the string, or return false. + */ +bool parse_option_str(const char *str, const char *option) +{ + while (*str) { + if (!strncmp(str, option, strlen(option))) { + str += strlen(option); + if (!*str || *str == ',') + return true; + } + + while (*str && *str != ',') + str++; + + if (*str == ',') + str++; + } + + return false; +} |