Freeing block mprotects on the page which it turn may lead to application crash if linker subsequently tries to modify another block on the page. Bug: 14895266 Change-Id: I8ff7f5df467d7be184242de652032b3c84e24b76
Makes it reusable for different fixed sized and not very big structures (<PAGE_SIZE). Change-Id: Id5ec13fc6541b1935ef7fe3671c22b98685abbae