函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\locking\lockdep.c Create Date:2022-07-27 10:50:31
Last Modify:2020-03-17 14:16:01 Copyright©Brick
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函数名称：lock_downgrade

函数原型：void lock_downgrade(struct lockdep_map *lock, unsigned long ip)

返回类型：void

参数：

类型参数名称
struct lockdep_map *lock
unsigned longip
4453  如果此条件成立可能性小(为编译器优化)(lockdep_recursion)则返回
4456  raw_local_irq_save(flags)
4457  lockdep_recursion等于1
4458  Check whether we follow the irq-flags state precisely:
4459  如果__lock_downgrade(lock, ip)则We are building curr_chain_key incrementally, so double-check* it from scratch, to make sure that it's done correctly:
4461  lockdep_recursion等于0
4462  raw_local_irq_restore(flags)
调用者
名称描述
downgrade_writedowngrade write lock to read lock