how to vm_munmap memory range for other processes?

[Richard Zhao]

Hi Al,

I saw two commits from you in git tree:
17d1587 unexport do_munmap()
bfce281 kill mm argument of vm_munmap()

They remove the mm arguments, so it look like impossible to unmap
memory of other processes except current.

I have a kernel module that needs to unmap memory for certain pid. Do
you have any idea how to do it?

Thanks
Richard

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