函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:include\linux\ptr_ring.h Create Date:2022-07-27 14:40:37
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：Note: callers invoking this in a loop must use a compiler barrier,* for example cpu_relax(). Callers must hold producer_lock.* Callers are responsible for making sure pointer that is being queued* points to a valid data.

函数原型：static inline int __ptr_ring_produce(struct ptr_ring *r, void *ptr)

返回类型：int

参数：

类型参数名称
struct ptr_ring *r
void *ptr
105  如果此条件成立可能性小(为编译器优化)(! Read-only by both the producer and the consumer )或queue[producer]则返回:负ENOSPC
110  smp_wmb()
112  WRITE_ONCE(queue[producer++], ptr)
113  如果此条件成立可能性小(为编译器优化)(producer >= Read-only by both the producer and the consumer )则producer等于0
115  返回:0
调用者
名称描述
bq_flush_to_queue
ptr_ring_produceNote: resize (below) nests producer lock within consumer lock, so if you* consume in interrupt or BH context, you must disable interrupts/BH when* calling this.
ptr_ring_produce_irq
ptr_ring_produce_any
ptr_ring_produce_bh