diff options
Diffstat (limited to 'init/main.c')
| -rw-r--r-- | init/main.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/init/main.c b/init/main.c index 359358500e54..f88d896c0123 100644 --- a/init/main.c +++ b/init/main.c @@ -873,6 +873,47 @@ void __init __weak arch_call_rest_init(void) rest_init(); } +static void __init print_unknown_bootoptions(void) +{ + char *unknown_options; + char *end; + const char *const *p; + size_t len; + + if (panic_later || (!argv_init[1] && !envp_init[2])) + return; + + /* + * Determine how many options we have to print out, plus a space + * before each + */ + len = 1; /* null terminator */ + for (p = &argv_init[1]; *p; p++) { + len++; + len += strlen(*p); + } + for (p = &envp_init[2]; *p; p++) { + len++; + len += strlen(*p); + } + + unknown_options = memblock_alloc(len, SMP_CACHE_BYTES); + if (!unknown_options) { + pr_err("%s: Failed to allocate %zu bytes\n", + __func__, len); + return; + } + end = unknown_options; + + for (p = &argv_init[1]; *p; p++) + end += sprintf(end, " %s", *p); + for (p = &envp_init[2]; *p; p++) + end += sprintf(end, " %s", *p); + + pr_notice("Unknown command line parameters:%s\n", unknown_options); + memblock_free(__pa(unknown_options), len); +} + asmlinkage __visible void __init __no_sanitize_address start_kernel(void) { char *command_line; @@ -914,6 +955,7 @@ asmlinkage __visible void __init __no_sanitize_address start_kernel(void) static_command_line, __start___param, __stop___param - __start___param, -1, -1, NULL, &unknown_bootoption); + print_unknown_bootoptions(); if (!IS_ERR_OR_NULL(after_dashes)) parse_args("Setting init args", after_dashes, NULL, 0, -1, -1, NULL, set_init_arg); |