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-rw-r--r--init/main.c42
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);