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

- build bugfix from Fam and new configure check from Emilio
- two improvements to "info mtere" from Gerd
- KVM support for memory transaction attributes
- one more small step towards unlocked MMIO dispatch
- one piece of the qemu-nbd errno fixes
- trivial-ish patches from Denis and Thomas

# gpg: Signature made Fri May  8 13:47:29 2015 BST using RSA key ID 78C7AE83
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>"
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>"
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg:          It is not certain that the signature belongs to the owner.
# 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:
  qemu-nbd: only send a limited number of errno codes on the wire
  rules.mak: Force CFLAGS for all objects in DSO
  configure: require __thread support
  exec: move rcu_read_lock/unlock to address_space_translate callers
  kvm: add support for memory transaction attributes
  mtree: also print disabled regions
  mtree: tag & indent a bit better
  apic_common: improve readability of apic_reset_common
  kvm: Silence warning from valgrind

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

1 files changed, 3 insertions, 1 deletions

diff --git a/include/exec/memory.h b/include/exec/memory.h
index 0ccfd3b42a..b61c84f62a 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -1233,7 +1233,9 @@ void address_space_stq(AddressSpace *as, hwaddr addr, uint64_t val,
 #endif
 
 /* address_space_translate: translate an address range into an address space
- * into a MemoryRegion and an address range into that section
+ * into a MemoryRegion and an address range into that section.  Should be
+ * called from an RCU critical section, to avoid that the last reference
+ * to the returned region disappears after address_space_translate returns.
  *
  * @as: #AddressSpace to be accessed
  * @addr: address within that address space