[PATCH] kmemcheck: use set_memory_4k() instead of disabling PSE

[Vegard Nossum]

Hi,

With this, we reduce the overall impact of kmemcheck by reverting some
earlier, now unnecessary, changes:

  Documentation/kmemcheck.txt  |  101 +++++
  MAINTAINERS                  |    8 +
  arch/x86/Kconfig.debug       |   87 ++++
  arch/x86/kernel/Makefile     |    2 +
- arch/x86/kernel/cpu/common.c |    7 +
  arch/x86/kernel/entry_32.S   |    8 +-
  arch/x86/kernel/entry_64.S   |    4 +-
- arch/x86/kernel/head_32.S    |    2 +-
- arch/x86/kernel/kmemcheck.c  |  964 ++++++++++++++++++++++++++++++++++++++++++
+ arch/x86/kernel/kmemcheck.c  |  963 ++++++++++++++++++++++++++++++++++++++++++
  arch/x86/kernel/process.c    |    2 +-
  arch/x86/kernel/process_32.c |    4 +-
  arch/x86/kernel/process_64.c |   12 +-
  arch/x86/kernel/traps_32.c   |   18 +-
  arch/x86/kernel/traps_64.c   |   16 +-
- arch/x86/mm/fault.c          |   25 +-
- arch/x86/mm/init_32.c        |    2 +-
+ arch/x86/mm/fault.c          |   35 ++
  include/asm-x86/kdebug.h     |    3 +-
  include/asm-x86/kmemcheck.h  |   30 ++
  include/asm-x86/pgtable.h    |    4 +-
  include/asm-x86/pgtable_32.h |    6 +
  include/asm-x86/pgtable_64.h |    6 +
  include/asm-x86/string_32.h  |    8 +
  include/asm-x86/string_64.h  |    1 +
  include/linux/gfp.h          |    3 +-
  include/linux/kmemcheck.h    |   61 +++
  include/linux/mm_types.h     |    4 +
  include/linux/slab.h         |    7 +
  include/linux/slab_def.h     |   81 ++++
  init/main.c                  |    2 +
  kernel/fork.c                |   16 +-
  kernel/sysctl.c              |   12 +
  mm/Makefile                  |    2 +-
  mm/kmemcheck.c               |   97 +++++
  mm/slab.c                    |  101 +----
  mm/slub.c                    |   17 +-
- 35 files changed, 1601 insertions(+), 122 deletions(-)
+ 32 files changed, 1605 insertions(+), 116 deletions(-)

which is probably a good thing if it is ever merged into mainline :-)

See patch description for more info.

Vegard