hg: jdk/jdk12: 8215879: AArch64: ReservedStackAccess may leave stack guard in inconsistent state

[aph at redhat.com]

Changeset: b5c41404f2d1
Author:    aph
Date:      2018-12-21 18:26 +0000
URL:       http://hg.openjdk.java.net/jdk/jdk12/rev/b5c41404f2d1

8215879: AArch64: ReservedStackAccess may leave stack guard in inconsistent state
Reviewed-by: aph, dholmes
Contributed-by: Andrey Petushkov <andrey.petushkov at gmail.com>

! src/hotspot/os_cpu/linux_aarch64/os_linux_aarch64.cpp
! src/hotspot/share/runtime/thread.cpp