Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:include\net\ipv6.h Create Date:2022-07-28 06:11:23
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Name:txopt_get

Proto:static inline struct ipv6_txoptions *txopt_get(const struct ipv6_pinfo *np)

Type:struct ipv6_txoptions

Parameter:

TypeParameterName
const struct ipv6_pinfo *np
375  _read_lock() - mark the beginning of an RCU read-side critical section* When synchronize_rcu() is invoked on one CPU while other CPUs* are within RCU read-side critical sections, then the* synchronize_rcu() is guaranteed to block until after all the other
376  opt = fetch RCU-protected pointer for dereferencing(opt)
377  If opt Then
378  If Not _inc_not_zero - increment a refcount unless it is 0*@r: the refcount to increment* Similar to atomic_inc_not_zero(), but will saturate at REFCOUNT_SATURATED* and WARN.* Provides no memory ordering, it is assumed the caller has guaranteed the Then opt = NULL
380  Else opt = cu_pointer_handoff() - Hand off a pointer from RCU to other mechanism*@p: The pointer to hand off* This is simply an identity function, but it documents where a pointer* is handed off from RCU to some other synchronization mechanism, for(opt)
383  _read_unlock() - marks the end of an RCU read-side critical section.* In most situations, rcu_read_unlock() is immune from deadlock.* However, in kernels built with CONFIG_RCU_BOOST, rcu_read_unlock()
384  Return opt