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param: Fix duplicate module prefixes

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Instead of insisting each new module_param sysfs entry is unique,
handle the case where it already exists (for builtin modules).

The current code assumes that all identical prefixes are together in
the section: true for normal uses, but not necessarily so if someone
overrides MODULE_PARAM_PREFIX.  More importantly, it's not true with
the new "core_param()" code which uses "kernel" as a prefix.

This simplifies the caller for the builtin case, at a slight loss of
efficiency (we do the lookup every time to see if the directory
exists).

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Rusty Russell 2008-10-22 10:00:22 -05:00
parent 730b69d225
commit 9b473de872
2 changed files with 141 additions and 120 deletions
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2
include/linux/module.h
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@ -60,6 +60,7 @@ struct module_kobject
struct kobject kobj;
struct module *mod;
struct kobject *drivers_dir;
struct module_param_attrs *mp;
};
/* These are either module local, or the kernel's dummy ones. */
@ -242,7 +243,6 @@ struct module
/* Sysfs stuff. */
struct module_kobject mkobj;
struct module_param_attrs *param_attrs;
struct module_attribute *modinfo_attrs;
const char *version;
const char *srcversion;