srcu_might_be_idle

Name:If SRCU is likely idle, return true, otherwise return false.* Note that it is OK for several current from-idle requests for a new* grace period from idle to specify expediting because they will all end* up requesting the same grace period anyhow

Proto:static bool srcu_might_be_idle(struct srcu_struct *ssp)

Type:bool

Parameter:

Type	Parameter	Name
struct srcu_struct *	ssp

768

local_irq_save(flags)

769

sdp = this_cpu_ptr(sda)

770

If Does the specified rcu_segcblist structure contain callbacks that* are still pending, that is, not yet ready to be invoked? Then

771

local_irq_restore(flags)

772

Return false

774

local_irq_restore(flags)

783

t = ktime_get_mono_fast_ns()

784

tlast = READ_ONCE(srcu_last_gp_end)

785

If exp_holdoff == 0 || Calculate whether a is in the range of [b, c).(t, tlast, tlast + exp_holdoff) Then Return false

790

curseq = Return the current value the update side's sequence number, no ordering.

791

792

If ULONG_CMP_LT(curseq, READ_ONCE(srcu_gp_seq_needed)) Then Return false

794

795

If curseq != Return the current value the update side's sequence number, no ordering. Then Return false

797

Return true

**Caller**
Name	Describe
synchronize_srcu	synchronize_srcu - wait for prior SRCU read-side critical-section completion*@ssp: srcu_struct with which to synchronize

Source code conversion tool public plug-in interface	X
Support c/c++/esqlc/java Oracle/Informix/Mysql Plug-in can realize: logical Report Code generation and batch code conversion