exec: Remove MemoryRegion::global_locking field

Last uses of memory_region_clear_global_locking() have been
removed in commit 7070e085d4 ("acpi: mark PMTIMER as unlocked")
and commit 08565552f7 ("cputlb: Move NOTDIRTY handling from I/O
path to TLB path").
Remove memory_region_clear_global_locking() and the now unused
'global_locking' field in MemoryRegion.

Reported-by: Alexander Bulekov <alxndr@bu.edu>
Suggested-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20200806150726.962-1-philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/exec.c b/exec.c
index 3f5deb35ff..c088559d94 100644
--- a/exec.c
+++ b/exec.c
@@ -3137,7 +3137,7 @@ static bool prepare_mmio_access(MemoryRegion *mr)
     bool unlocked = !qemu_mutex_iothread_locked();
     bool release_lock = false;
 
-    if (unlocked && mr->global_locking) {
+    if (unlocked) {
         qemu_mutex_lock_iothread();
         unlocked = false;
         release_lock = true;