maybe_unlock_mmap_for_io

函数名称：maybe_unlock_mmap_for_io

函数原型：static inline struct file *maybe_unlock_mmap_for_io(struct vm_fault *vmf, struct file *fpin)

返回类型：struct file

参数：

类型	参数	名称
struct vm_fault *	vmf
struct file *	fpin

372

flags等于FAULT_FLAG_xxx flags

374

如果fpin则返回:fpin

382

如果flags按位与Retry fault if blocking 按位或Don't drop mmap_sem and wait when retrying 的值的值恒等于Retry fault if blocking 则

384

fpin等于get_file(File we map to (can be NULL). )

385

lease a read lock

387

返回:fpin

**调用者**
名称	描述
lock_page_maybe_drop_mmap	lock_page_maybe_drop_mmap - lock the page, possibly dropping the mmap_sem@vmf - the vm_fault for this fault.@page - the page to lock.*@fpin - the pointer to the file we may pin (or is already pinned).
do_sync_mmap_readahead	Synchronous readahead happens when we don't even find a page in the page* cache at all. We don't want to perform IO under the mmap sem, so if we have* to drop the mmap sem we return the file that was pinned in order for us to do* that
do_async_mmap_readahead	Asynchronous readahead happens when we find the page and PG_readahead,* so we want to possibly extend the readahead further. We return the file that* was pinned if we have to drop the mmap_sem in order to do IO.
filemap_fault	lemap_fault - read in file data for page fault handling@vmf: struct vm_fault containing details of the fault filemap_fault() is invoked via the vma operations vector for a* mapped memory region to read in file data during a page fault
fault_dirty_shared_page	Handle dirtying of a page in shared file mapping on a write fault.* The function expects the page to be locked and unlocks it.

源代码转换工具开放的插件接口	X
支持：c/c++/esqlc/java Oracle/Informix/Mysql 插件可实现：逻辑报告代码生成和批量转换代码