Merge tag 'virtio-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux

Pull virtio update from Rusty Russell:
 "More console fixes; these are the theoretical ones which didn't get
  CC:stable.  But for that reason, I did a merge with master partway
  through to avoid an unnecessary conflict.

  Also: a fun lguest bug turns out if you don't clear the TF flag when
  trapping Bad Things happen to the guest kernel as the stack
  overflows..."

* tag 'virtio-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux:
  virtio_pci: pm: Use CONFIG_PM_SLEEP instead of CONFIG_PM
  lguest: fix GPF in guest when using gdb.
  lguest: fix guest kernel stack overflow when TF bit set.
  lguest: fix BUG_ON() in invalid guest page table.
  virtio: console: prevent use-after-free of port name in port unplug
  virtio: console: cleanup an error message
  virtio: console: fix locking around send_sigio_to_port()
  virtio: console: add locking in port unplug path
  virtio: console: add locks around buffer removal in port unplug path
  tools/lguest: offer VIRTIO_F_ANY_LAYOUT for net device.
  virtio tools: add .gitignore
  lguest: Point to the right directory for the lguest launcher

1 files changed, 8 insertions, 2 deletions

diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c
index 6a22c19da66..bdf8532494f 100644
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -7,8 +7,7 @@
  * kernel and insert a module (lg.ko) which allows us to run other Linux
  * kernels the same way we'd run processes.  We call the first kernel the Host,
  * and the others the Guests.  The program which sets up and configures Guests
- * (such as the example in Documentation/virtual/lguest/lguest.c) is called the
- * Launcher.
+ * (such as the example in tools/lguest/lguest.c) is called the Launcher.
  *
  * Secondly, we only run specially modified Guests, not normal kernels: setting
  * CONFIG_LGUEST_GUEST to "y" compiles this file into the kernel so it knows
@@ -1057,6 +1056,12 @@ static void lguest_load_sp0(struct tss_struct *tss,
 }
 
 /* Let's just say, I wouldn't do debugging under a Guest. */
+static unsigned long lguest_get_debugreg(int regno)
+{
+	/* FIXME: Implement */
+	return 0;
+}
+
 static void lguest_set_debugreg(int regno, unsigned long value)
 {
 	/* FIXME: Implement */
@@ -1304,6 +1309,7 @@ __init void lguest_init(void)
 	pv_cpu_ops.load_tr_desc = lguest_load_tr_desc;
 	pv_cpu_ops.set_ldt = lguest_set_ldt;
 	pv_cpu_ops.load_tls = lguest_load_tls;
+	pv_cpu_ops.get_debugreg = lguest_get_debugreg;
 	pv_cpu_ops.set_debugreg = lguest_set_debugreg;
 	pv_cpu_ops.clts = lguest_clts;
 	pv_cpu_ops.read_cr0 = lguest_read_cr0;