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

- scsi: improvements to error reporting and conversion to realize,
  Coverity/sparse fix for iscsi driver
- RCU fallout: fix -daemonize and s390x system emulation
- KVM: kvm_stat improvements and new man page
- x86: SYSRET fix for VxWorks

# gpg: Signature made Tue Mar 10 10:18:45 2015 GMT 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 a trusted signature!
# gpg:          There is no indication 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:
  x86: fix SS selector in SYSRET
  scsi: Convert remaining PCI HBAs to realize()
  scsi: Improve error reporting for invalid drive property
  hw: Propagate errors through qdev_prop_set_drive()
  scsi: Clean up duplicated error in legacy if=scsi code
  cpus: initialize cpu->memory_dispatch
  rcu: handle forks safely
  qemu-thread: do not use PTHREAD_MUTEX_ERRORCHECK
  kvm_stat: add kvm_stat.1 man page
  kvm_stat: add column headers to text UI
  iscsi: Fix check for username

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

diff --cc exec.c
Simple merge

diff --cc hw/usb/dev-storage.c
Simple merge

diff --cc include/hw/qdev-properties.h
Simple merge