函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:fs\block_dev.c Create Date:2022-07-29 10:46:04
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：bdev_get_gendisk

函数原型：static struct gendisk *bdev_get_gendisk(struct block_device *bdev, int *partno)

返回类型：struct gendisk

参数：

类型参数名称
struct block_device *bdev
int *partno
1100  disk等于get_gendisk( not a kdev_t - it's a search key , partno)
1102  如果非disk则返回:NULL
1112  如果inode_unhashed( will die )则
1113  put_disk_and_module(disk)
1114  返回:NULL
1116  返回:disk
调用者
名称描述
bd_start_claimingd_start_claiming - start claiming a block device*@bdev: block device of interest*@holder: holder trying to claim @bdev*@bdev is about to be opened exclusively
__blkdev_getd_mutex locking:* mutex_lock(part->bd_mutex)* mutex_lock_nested(whole->bd_mutex, 1)