sg_zero_buffer

函数名称：sg_zero_buffer - Zero-out a part of a SG list*@sgl: The SG list*@nents: Number of SG entries*@buflen: The number of bytes to zero out*@skip: Number of bytes to skip before zeroing* Returns the number of bytes zeroed.

函数原型：size_t sg_zero_buffer(struct scatterlist *sgl, unsigned int nents, size_t buflen, off_t skip)

返回类型：size_t

参数：

类型	参数	名称
struct scatterlist *	sgl
unsigned int	nents
size_t	buflen
off_t	skip

958

offset等于0

960

sg_flags等于use kmap_atomic 按位或lush back to phys on unmap

962

开始映射迭代一个SG名单

964

如果非sg_miter_skip - reposition mapping iterator*@miter: sg mapping iter to be skipped*@offset: number of bytes to plus the current location* Description:* Sets the offset of @miter to its current location plus @offset bytes则返回:false

967

当offset小于buflen且sg_miter_next - proceed mapping iterator to the next mapping*@miter: sg mapping iter to proceed* Description:* Proceeds @miter to the next mapping. @miter should have been started* using sg_miter_start(). On successful return, @miter->page,循环

970

len等于两数取小( length of the mapped area , buflen - offset)

971

memset( pointer to the mapped area , 0, len)

973

offset加等于len

976

sg_miter_stop - stop mapping iteration*@miter: sg mapping iter to be stopped* Description:* Stops mapping iterator @miter. @miter should have been started* using sg_miter_start(). A stopped iteration can be resumed by* calling sg_miter_next() on it

977

返回:offset

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