walk_page_mapping

函数名称：walk_page_mapping - walk all memory areas mapped into a struct address_space

函数原型：int walk_page_mapping(struct address_space *mapping, unsigned long first_index, unsigned long nr, const struct mm_walk_ops *ops, void *private)

返回类型：int

参数：

类型	参数	名称
struct address_space *	mapping
unsigned long	first_index
unsigned long	nr
const struct mm_walk_ops *	ops
void *	private

430

struct mm_walk walk = {ops = ops, private = private, }

437

err等于0

439

lockdep_assert_held( & i_mmap_rwsem)

443

vba等于Offset (within vm_file) in PAGE_SIZEunits

444

vea等于vba加vma_pages(vma)

445

cba等于first_index

446

cba等于两数取大(cba, vba)

447

cea等于first_index加nr

448

cea等于两数取小(cea, vea)

450

start_addr等于cba减vba左移PAGE_SHIFT determines the page size 位的值加Our start address within vm_mm.

451

end_addr等于cea减vba左移PAGE_SHIFT determines the page size 位的值加Our start address within vm_mm.

452

如果start_addr大于等于end_addr则继续下一循环

455

vma等于vma

456

mm等于The address space we belong to.

458

err等于Decide whether we really walk over the current vma on [@start, @end)* or skip it via the returned value. Return 0 if we do walk over the* current vma, and return 1 if we skip the vma. Negative values means* error, where we abort the current walk.

459

如果err大于0则

460

err等于0

461

退出

462

否则如果err小于0则退出

465

err等于__walk_page_range(start_addr, end_addr, & walk)

466

如果err则退出

470

返回:err

**调用者**
名称	描述
wp_shared_mapping_range	wp_shared_mapping_range - Write-protect all ptes in an address space range@mapping: The address_space we want to write protect@first_index: The first page offset in the range@nr: Number of incremental page offsets to cover Note: This function
clean_record_shared_mapping_range	lean_record_shared_mapping_range - Clean and record all ptes in an* address space range@mapping: The address_space we want to clean@first_index: The first page offset in the range@nr: Number of incremental page offsets to cover@bitmap_pgoff: The page

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

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