Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging

Miscellaneous bugfixes

# gpg: Signature made Wed 15 Nov 2017 15:27:25 GMT
# gpg:                using RSA key 0xBFFBD25F78C7AE83
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>"
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>"
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4  E2F7 7E15 100C CD36 69B1
#      Subkey fingerprint: F133 3857 4B66 2389 866C  7682 BFFB D25F 78C7 AE83

* remotes/bonzini/tags/for-upstream:
  fix scripts/update-linux-headers.sh here document
  exec: Do not resolve subpage in mru_section
  util/stats64: Fix min/max comparisons
  cpu-exec: avoid cpu_exec_nocache infinite loop with record/replay
  cpu-exec: don't overwrite exception_index
  vhost-user-scsi: add missing virtqueue_size param
  target-i386: adds PV_TLB_FLUSH CPUID feature bit
  thread-posix: fix qemu_rec_mutex_trylock macro
  Makefile: simpler/faster "make help"
  ioapic/tracing: Remove last DPRINTFs
  Enable 8-byte wide MMIO for 16550 serial devices

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 3 insertions, 9 deletions

diff --git a/exec.c b/exec.c
index 8b579c0cd9..2202f2d731 100644
--- a/exec.c
+++ b/exec.c
@@ -410,22 +410,16 @@ static MemoryRegionSection *address_space_lookup_region(AddressSpaceDispatch *d,
 {
     MemoryRegionSection *section = atomic_read(&d->mru_section);
     subpage_t *subpage;
-    bool update;
 
-    if (section && section != &d->map.sections[PHYS_SECTION_UNASSIGNED] &&
-        section_covers_addr(section, addr)) {
-        update = false;
-    } else {
+    if (!section || section == &d->map.sections[PHYS_SECTION_UNASSIGNED] ||
+        !section_covers_addr(section, addr)) {
         section = phys_page_find(d, addr);
-        update = true;
+        atomic_set(&d->mru_section, section);
     }
     if (resolve_subpage && section->mr->subpage) {
         subpage = container_of(section->mr, subpage_t, iomem);
         section = &d->map.sections[subpage->sub_section[SUBPAGE_IDX(addr)]];
     }
-    if (update) {
-        atomic_set(&d->mru_section, section);
-    }
     return section;
 }