Merge tag 'for-linus-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml

Pull UML updates from Richard Weinberger:
 - hostfs saw a face lifting
 - old/broken stuff was removed (SMP, HIGHMEM, SKAS3/4)
 - random cleanups and bug fixes

* tag 'for-linus-4.1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml: (26 commits)
  um: Print minimum physical memory requirement
  um: Move uml_postsetup in the init_thread stack
  um: add a kmsg_dumper
  x86, UML: fix integer overflow in ELF_ET_DYN_BASE
  um: hostfs: Reduce number of syscalls in readdir
  um: Remove broken highmem support
  um: Remove broken SMP support
  um: Remove SKAS3/4 support
  um: Remove ppc cruft
  um: Remove ia64 cruft
  um: Remove dead code from stacktrace
  hostfs: No need to box and later unbox the file mode
  hostfs: Use page_offset()
  hostfs: Set page flags in hostfs_readpage() correctly
  hostfs: Remove superfluous initializations in hostfs_open()
  hostfs: hostfs_open: Reset open flags upon each retry
  hostfs: Remove superfluous test in hostfs_open()
  hostfs: Report append flag in ->show_options()
  hostfs: Use __getname() in follow_link
  hostfs: Remove open coded strcpy()
  ...

diff --cc arch/um/Kconfig.um
Simple merge

diff --cc arch/x86/um/asm/barrier.h
Simple merge

diff --cc fs/hostfs/hostfs_kern.c
index e021188,d0a2f68..b83a034
--- 1/fs/hostfs/hostfs_kern.c
--- 2/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@@ -381,8 -390,10 +390,8 @@@ static const struct file_operations hos
        .splice_read    = generic_file_splice_read,
        .read_iter      = generic_file_read_iter,
        .write_iter     = generic_file_write_iter,
 -      .write          = new_sync_write,
        .mmap           = generic_file_mmap,
-       .open           = hostfs_file_open,
+       .open           = hostfs_open,
        .release        = hostfs_file_release,
        .fsync          = hostfs_fsync,
  };