From: Zhong Jinghua <zhongjinghua@huawei.com> hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I81XCK ---------------------------------------- Modify the return value type of blk_register_region to prepare for adding error handling. Signed-off-by: Zhong Jinghua <zhongjinghua@huawei.com> Signed-off-by: Li Nan <linan122@huawei.com> --- include/linux/genhd.h | 2 +- block/genhd.c | 5 +++-- 2 files changed, 4 insertions(+), 3 deletions(-) diff --git a/include/linux/genhd.h b/include/linux/genhd.h index 959add98b686..61b5e9359152 100644 --- a/include/linux/genhd.h +++ b/include/linux/genhd.h @@ -361,7 +361,7 @@ extern struct gendisk *__alloc_disk_node(int minors, int node_id); extern struct kobject *get_disk_and_module(struct gendisk *disk); extern void put_disk(struct gendisk *disk); extern void put_disk_and_module(struct gendisk *disk); -extern void blk_register_region(dev_t devt, unsigned long range, +extern int blk_register_region(dev_t devt, unsigned long range, struct module *module, struct kobject *(*probe)(dev_t, int *, void *), int (*lock)(dev_t, void *), diff --git a/block/genhd.c b/block/genhd.c index 33d5f8632030..c620597cfc0d 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -649,12 +649,13 @@ static char *bdevt_str(dev_t devt, char *buf) * Register device numbers dev..(dev+range-1) * range must be nonzero * The hash chain is sorted on range, so that subranges can override. + * Add error handling. */ -void blk_register_region(dev_t devt, unsigned long range, struct module *module, +int blk_register_region(dev_t devt, unsigned long range, struct module *module, struct kobject *(*probe)(dev_t, int *, void *), int (*lock)(dev_t, void *), void *data) { - kobj_map(bdev_map, devt, range, module, probe, lock, data); + return kobj_map(bdev_map, devt, range, module, probe, lock, data); } EXPORT_SYMBOL(blk_register_region); -- 2.39.2