xas_prev

函数名称：xas_prev() - Move iterator to previous index.*@xas: XArray operation state.* If the @xas was in an error state, it will remain in an error state* and this function will return %NULL. If the @xas has never been walked,

函数原型：static inline void *xas_prev(struct xa_state *xas)

返回类型：void

参数：

类型	参数	名称
struct xa_state *	xas

1745

node等于xa_node

1747

如果此条件成立可能性小(为编译器优化)(True if the pointer is something other than a node || Bits remaining in each slot || xa_offset == 0)则返回:__xas_prev() - Find the previous entry in the XArray.*@xas: XArray operation state.* Helper function for xas_prev() which handles all the complex cases* out of line.

1751

xa_index自减

1752

xa_offset自减

1753

返回:Private

**调用者**
名称	描述
check_move_tiny
check_move_small
check_move
page_cache_prev_miss	page_cache_prev_miss() - Find the previous gap in the page cache.@mapping: Mapping.@index: Index.@max_scan: Maximum range to search. Search the range [max(index - max_scan + 1, 0), index] for the* gap with the highest index.

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

函数逻辑报告