tree 3e8f2fa27c5a3cea6410f5e9fadd7f69623c2c36
parent c00f05a92424c7788fdbf0909b823f8027596d66
author David Hildenbrand <david@redhat.com> 1595411154 +0200
committer Heiko Carstens <hca@linux.ibm.com> 1595838831 +0200

s390/vmemmap: take the vmem_mutex when populating/freeing

Let's synchronize all accesses to the 1:1 and vmemmap mappings. This will
be especially relevant when wanting to cleanup empty page tables that could
be shared by both. Avoid races when removing tables that might be just
about to get reused.

Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20200722094558.9828-6-david@redhat.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>