← 返回 修复 sysfs 文件删除后的陈旧映射
v1 2026-07-22

修复 sysfs 文件删除后的陈旧映射 · v1

新增unmap_mapping_file()用于按struct file撤销VMA映射，修复PCI BAR sysfs文件在设备移除后映射残留问题。

原始补丁链接

查看原始邮件 ↗ 查看原始邮件 ↗

子 Patch（2）

1/2
mm: Add unmap_mapping_file() helper
[mm: Add unmap_mapping_file() helper] Currently, unmap_mapping_pages() and unmap_mapping_range() unmap a page offset window of an address_space, and teardown paths such as kernfs_drain_open_files() re
2/2
kernfs: Unmap mmaps of removed files via file->f_mapping
Currently, kernfs_drain_open_files() unmaps file_inode(of->file)->i_mapping when a node with mmapped open files is removed. Since commit 636b21b50152 (“PCI: Revoke mappings like devmem”), PCI resourc