Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\locking\rwsem.c Create Date:2022-07-28 09:48:01
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Name:All writes to owner are protected by WRITE_ONCE() to make sure that* store tearing can't happen as optimistic spinners may read and use* the owner value concurrently without lock

Proto:static inline void rwsem_set_owner(struct rw_semaphore *sem)

Type:void

Parameter:

TypeParameterName
struct rw_semaphore *sem
177  atomic_long_set( & Write owner or one of the read owners as well flags regarding* the current state of the rwsem. Can be used as a speculative* check to see if the write owner is running on the cpu., (long)current process)
Caller
NameDescribe
rwsem_try_write_lockThis function must be called with the sem->wait_lock held to prevent* race conditions between checking the rwsem wait list and setting the* If wstate is WRITER_HANDOFF, it will make sure that either the handoff
__down_writelock for writing
__down_write_killable
__down_write_trylock