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>

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This commit is contained in:

Rusty Russell 2008-10-22 10:00:22 -05:00

parent 730b69d225

commit 9b473de872

2 changed files with 142 additions and 121 deletions

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2

include/linux/module.h

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259

kernel/params.c

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