params: add 3rd arg to option handler callback signature

Add a 3rd arg, named "doing", to unknown-options callbacks invoked
from parse_args(). The arg is passed as:

  "Booting kernel" from start_kernel(),
  initcall_level_names[i] from do_initcall_level(),
  mod->name from load_module(), via parse_args(), parse_one()

parse_args() already has the "name" parameter, which is renamed to
"doing" to better reflect current uses 1,2 above.  parse_args() passes
it to an altered parse_one(), which now passes it down into the
unknown option handler callbacks.

The mod->name will be needed to handle dyndbg for loadable modules,
since params passed by modprobe are not qualified (they do not have a
"$modname." prefix), and by the time the unknown-param callback is
called, the module name is not otherwise available.

Minor tweaks:

Add param-name to parse_one's pr_debug(), current message doesnt
identify the param being handled, add it.

Add a pr_info to print current level and level_name of the initcall,
and number of registered initcalls at that level.  This adds 7 lines
to dmesg output, like:

   initlevel:6=device, 172 registered initcalls

Drop "parameters" from initcall_level_names[], its unhelpful in the
pr_info() added above.  This array is passed into parse_args() by
do_initcall_level().

CC: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
Acked-by: Jason Baron <jbaron@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

init/main.c

diff --git a/init/main.c b/init/main.c
index 9d454f0..11bc6f7 100644
--- a/init/main.c
+++ b/init/main.c
@@ -229,7 +229,8 @@
  * Unknown boot options get handed to init, unless they look like
  * unused parameters (modprobe will find them in /proc/cmdline).
  */
-static int __init unknown_bootoption(char *param, char *val)
+static int __init unknown_bootoption(char *param, char *val,
+				const char *unused)
 {
 	/* Change NUL term back to "=", to make "param" the whole string. */
 	if (val) {
@@ -379,7 +380,7 @@
 }
 
 /* Check for early params. */
-static int __init do_early_param(char *param, char *val)
+static int __init do_early_param(char *param, char *val, const char *unused)
 {
 	const struct obs_kernel_param *p;
 
@@ -722,17 +723,18 @@
 };
 
 static char *initcall_level_names[] __initdata = {
-	"early parameters",
-	"core parameters",
-	"postcore parameters",
-	"arch parameters",
-	"subsys parameters",
-	"fs parameters",
-	"device parameters",
-	"late parameters",
+	"early",
+	"core",
+	"postcore",
+	"arch",
+	"subsys",
+	"fs",
+	"device",
+	"late",
 };
 
-static int __init ignore_unknown_bootoption(char *param, char *val)
+static int __init ignore_unknown_bootoption(char *param, char *val,
+					const char *doing)
 {
 	return 0;
 }
@@ -747,7 +749,7 @@
 		   static_command_line, __start___param,
 		   __stop___param - __start___param,
 		   level, level,
-		   ignore_unknown_bootoption);
+		   &ignore_unknown_bootoption);
 
 	for (fn = initcall_levels[level]; fn < initcall_levels[level+1]; fn++)
 		do_one_initcall(*fn);
@@ -757,8 +759,13 @@
 {
 	int level;
 
-	for (level = 0; level < ARRAY_SIZE(initcall_levels) - 1; level++)
+	for (level = 0; level < ARRAY_SIZE(initcall_levels) - 1; level++) {
+		pr_info("initlevel:%d=%s, %d registered initcalls\n",
+			level, initcall_level_names[level],
+			(int) (initcall_levels[level+1]
+				- initcall_levels[level]));
 		do_initcall_level(level);
+	}
 }
 
 /*