函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:mm\nommu.c Create Date:2022-07-27 16:02:53
Last Modify:2020-03-17 21:26:27 Copyright©Brick
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函数名称：lease a reference to a region* - the caller must hold the region semaphore for writing, which this releases* - the region may not have been added to the tree yet, in which case vm_top* will equal vm_start

函数原型：static void __put_nommu_region(struct vm_region *region)__releases(nommu_region_sem)

返回类型：void

参数：

类型参数名称
struct vm_region *region
558  BUG_ON(!rb_node)
560  如果gion usage count (access under nommu_region_sem) 先自减恒等于0则
561  如果gion allocated to here 大于start address of region 则delete a region from the global tree
563  lease a write lock
565  如果he backing file or NULL 则fput(he backing file or NULL )
570  如果VMA vm_flags 按位与VM_MAPPED_COPY则 a contiguous series of pages
572  kmem_cache_free(list of mapped, potentially shareable regions , region)
573  否则
574  lease a write lock
调用者
名称描述
put_nommu_regionlease a reference to a region