Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus

* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
  [MIPS] Cobalt: Fix UART I/O type
  [MIPS] Fixup copy_from_user_inatomic
  [MIPS] Fix struct sigcontext for N32 userland
  [MIPS] Make some __setup functions static
  [MIPS] Declare highstart_pfn, highend_pfn only if CONFIG_HIGHMEM=y
  [MIPS] Allow selection of KGDB only on platforms where it's supported.