函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\resource.c Create Date:2022-07-27 10:05:19
Last Modify:2022-05-22 11:14:39 Copyright©Brick
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函数名称：__release_region - release a previously reserved resource region*@parent: parent resource descriptor*@start: resource start address*@n: resource region size* The described resource region must match a currently busy region.

函数原型：void __release_region(struct resource *parent, resource_size_t start, resource_size_t n)

返回类型：void

参数：

类型参数名称
struct resource *parent
resource_size_tstart
resource_size_tn
1197  p等于child
1198  end等于start加n减1
1200  write_lock( & resource_lock)
1202  循环
1203  res等于p
1205  如果非res则退出
1207  如果start小于等于start且end大于等于end则
1208  如果非flags按位与Driver has marked this resource busy 的值则
1209  p等于child
1210  继续下一循环
1212  如果start不等于start或end不等于end则退出
1214  p等于sibling
1215  write_unlock( & resource_lock)
1216  如果flags按位与Resource is software muxed 则wake_up( & This is compatibility stuff for IO resources.* Note how this, unlike the above, knows about* the IO flag meanings (busy etc).* request_region creates a new busy region.* release_region releases a matching busy region.)
1218  free_resource(res)
1219  返回
1221  p等于sibling
1224  write_unlock( & resource_lock)
1226  printk(warning conditions "Trying to free nonexistent resource <%016llx-%016llx>\n", (unsignedlonglong)start, (unsignedlonglong)end)
调用者
名称描述
devm_region_release
__devm_release_region