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params: add 3rd arg to option handler callback signature

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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>
This commit is contained in:
Jim Cromie
2012-04-27 14:30:34 -06:00
committed by Greg Kroah-Hartman
parent 3faa286055
commit 9fb48c744b
3 changed files with 39 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files
init/main.c
+20 -13
View File
@@ -229,7 +229,8 @@ early_param("loglevel", loglevel);
* 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 @@ static noinline void __init_refok rest_init(void)
}
/* 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 initcall_t *initcall_levels[] __initdata = {
};
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 void __init do_initcall_level(int level)
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 @@ static void __init do_initcalls(void)
{
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);
}
}
/*