generic_write

函数名称：Sync the bytes written if this was a synchronous write. Expect ki_pos* to already be updated for the write, and will return either the amount* of bytes passed in, or an error if syncing the file failed.

函数原型：static inline ssize_t generic_write_sync(struct kiocb *iocb, ssize_t count)

返回类型：ssize_t

参数：

类型	参数	名称
struct kiocb *	iocb
ssize_t	count

**调用者**
名称	描述
generic_file_write_iter	generic_file_write_iter - write data to a file@iocb: IO state structure@from: iov_iter with data to write* This is a wrapper around __generic_file_write_iter() to be used by most* filesystems. It takes care of syncing the file in case of O_SYNC file
blkdev_write_iter	Write data to the block device. Only intended for the block device itself* and the raw driver which basically is a fake block device.* Does not take i_mutex for the write and thus is not for general purpose* use.
dio_complete	dio_complete() - called when all DIO BIO I/O has been completed* This drops i_dio_count, lets interested parties know that a DIO operation* has completed, and calculates the resulting return code for the operation
iomap_dio_complete

函数逻辑报告