Commit 0c232631 authored by Ge Bian's avatar Ge Bian
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LWIS: Enable enrolling buffers of the same vaddr more than once. 

Different fds may point to the same underlying buffers. This CL adds
supports to LWIS to keep track of a list of enrollment for each vaddr.

Bug: 194674350
Test: build, boot, unit tests, CTS.
Change-Id: I28c78fa687e7dfc362d6e45eac375c2255a3afff
parent 2fedc413
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