tree 3199b2df453cb6e904b29cf316eeff51b3ece1fb
parent f676eb408593933c80fc336d9fd409015365fcb7
author Nicolas Geoffray <ngeoffray@google.com> 1579015552 +0000
committer Nicolas Geoffray <ngeoffray@google.com> 1579086523 +0000

Surround MR uses with #if defined read barrier.

MR is only defined in the baker read barrier configuration.

Test: build with CMS configuration
Bug: 147094528
Change-Id: Ief13c74ac6706f82c065c3612d251fd52dcbc92e