__getblk

函数名称：__getblk_gfp() will locate (and, if necessary, create) the buffer_head* which corresponds to the passed block_device, block and size. The* returned buffer has its reference count incremented.* __getblk_gfp() will lock up the machine if grow_dev_page's

函数原型：struct buffer_head *__getblk_gfp(struct block_device *bdev, sector_t block, unsigned size, gfp_t gfp)

返回类型：struct buffer_head

参数：

类型	参数	名称
struct block_device *	bdev
sector_t	block
unsigned	size
gfp_t	gfp

**调用者**
名称	描述
__bread_gfp	__bread_gfp() - reads a specified block and returns the bh@bdev: the block_device to read from@block: number of block@size: size (in bytes) to read@gfp: page allocation flag* Reads a specified block, and returns buffer head that contains it

函数逻辑报告