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mtd: partitions: add module_mtd_part_parser() helper 

This can help eliminate some boilerplate by generating the module_init()
and module_exit() functions, and by automatically assigning the module
owner.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
hifive-unleashed-5.1
Brian Norris 2015-11-11 19:13:29 -08:00
parent 1d158315c1
commit b9eab01125
2 changed files with 19 additions and 3 deletions
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8
drivers/mtd/mtdpart.c
View File

@ -703,13 +703,17 @@ static struct mtd_part_parser *get_partition_parser(const char *name)
#define put_partition_parser(p) do { module_put((p)->owner); } while (0)
void register_mtd_parser(struct mtd_part_parser *p)
int __register_mtd_parser(struct mtd_part_parser *p, struct module *owner)
{
p->owner = owner;
spin_lock(&part_parser_lock);
list_add(&p->list, &part_parsers);
spin_unlock(&part_parser_lock);
return 0;
}
EXPORT_SYMBOL_GPL(register_mtd_parser);
EXPORT_SYMBOL_GPL(__register_mtd_parser);
void deregister_mtd_parser(struct mtd_part_parser *p)
{

14
include/linux/mtd/partitions.h
View File

@ -73,9 +73,21 @@ struct mtd_part_parser {
struct mtd_part_parser_data *);
};
extern void register_mtd_parser(struct mtd_part_parser *parser);
extern int __register_mtd_parser(struct mtd_part_parser *parser,
struct module *owner);
#define register_mtd_parser(parser) __register_mtd_parser(parser, THIS_MODULE)
extern void deregister_mtd_parser(struct mtd_part_parser *parser);
/*
* module_mtd_part_parser() - Helper macro for MTD partition parsers that don't
* do anything special in module init/exit. Each driver may only use this macro
* once, and calling it replaces module_init() and module_exit().
*/
#define module_mtd_part_parser(__mtd_part_parser) \
module_driver(__mtd_part_parser, register_mtd_parser, \
deregister_mtd_parser)
int mtd_is_partition(const struct mtd_info *mtd);
int mtd_add_partition(struct mtd_info *master, const char *name,
long long offset, long long length);