Merge tag 'for-linux-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml

Pull UML updates from Richard Weinberger:

 - Many cleanups and fixes for our virtio code

 - Add support for a pseudo RTC

 - Fix for a possible jailbreak

 - Minor fixes (spelling, header files)

* tag 'for-linux-5.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml:
  um: irq.h: include <asm-generic/irq.h>
  um: io.h: include <linux/types.h>
  um: add a pseudo RTC
  um: remove process stub VMA
  um: rework userspace stubs to not hard-code stub location
  um: separate child and parent errors in clone stub
  um: defer killing userspace on page table update failures
  um: mm: check more comprehensively for stub changes
  um: print register names in wait_for_stub
  um: hostfs: use a kmem cache for inodes
  mm: Remove arch_remap() and mm-arch-hooks.h
  um: fix spelling mistake in Kconfig "privleges" -> "privileges"
  um: virtio: allow devices to be configured for wakeup
  um: time-travel: rework interrupt handling in ext mode
  um: virtio: disable VQs during suspend
  um: virtio: fix handling of messages without payload
  um: virtio: clean up a comment

1 files changed, 12 insertions, 1 deletions

diff --git a/arch/um/drivers/Kconfig b/arch/um/drivers/Kconfig
index 2e7b8e0e7194..03ba34b61115 100644
--- a/arch/um/drivers/Kconfig
+++ b/arch/um/drivers/Kconfig
@@ -323,7 +323,7 @@ config UML_NET_SLIRP
 	  frames.  In general, slirp allows the UML the same IP connectivity
 	  to the outside world that the host user is permitted, and unlike
 	  other transports, SLiRP works without the need of root level
-	  privleges, setuid binaries, or SLIP devices on the host.  This
+	  privileges, setuid binaries, or SLIP devices on the host.  This
 	  also means not every type of connection is possible, but most
 	  situations can be accommodated with carefully crafted slirp
 	  commands that can be passed along as part of the network device's
@@ -346,3 +346,14 @@ config VIRTIO_UML
 	help
 	  This driver provides support for virtio based paravirtual device
 	  drivers over vhost-user sockets.
+
+config UML_RTC
+	bool "UML RTC driver"
+	depends on RTC_CLASS
+	# there's no use in this if PM_SLEEP isn't enabled ...
+	depends on PM_SLEEP
+	help
+	  When PM_SLEEP is configured, it may be desirable to wake up using
+	  rtcwake, especially in time-travel mode. This driver enables that
+	  by providing a fake RTC clock that causes a wakeup at the right
+	  time.