module loader dead code removal and cleanups v2

[Christoph Hellwig]

Hi all,

this series removes support for long term unused export types and
cleans up various loose ends in the module loader.

Changes since v1:
 - move struct symsearch to module.c
 - rework drm to not call find_module at all
 - llow RCU-sched locking for find_module
 - keep find_module as a public API instead of module_loaded
 - update a few comments and commit logs

Diffstat:
 arch/arm/configs/bcm2835_defconfig          |    1 
 arch/arm/configs/mxs_defconfig              |    1 
 arch/mips/configs/nlm_xlp_defconfig         |    1 
 arch/mips/configs/nlm_xlr_defconfig         |    1 
 arch/parisc/configs/generic-32bit_defconfig |    1 
 arch/parisc/configs/generic-64bit_defconfig |    1 
 arch/powerpc/configs/ppc6xx_defconfig       |    1 
 arch/powerpc/platforms/powernv/pci-cxl.c    |   22 -
 arch/s390/configs/debug_defconfig           |    1 
 arch/s390/configs/defconfig                 |    1 
 arch/sh/configs/edosk7760_defconfig         |    1 
 arch/sh/configs/sdk7780_defconfig           |    1 
 arch/x86/configs/i386_defconfig             |    1 
 arch/x86/configs/x86_64_defconfig           |    1 
 arch/x86/tools/relocs.c                     |    4 
 drivers/gpu/drm/drm_crtc_helper_internal.h  |   10 
 drivers/gpu/drm/drm_fb_helper.c             |   21 -
 drivers/gpu/drm/drm_kms_helper_common.c     |   25 +-
 include/asm-generic/vmlinux.lds.h           |   42 ---
 include/linux/export.h                      |    9 
 include/linux/kallsyms.h                    |   17 -
 include/linux/module.h                      |   48 ----
 init/Kconfig                                |   17 -
 kernel/kallsyms.c                           |    8 
 kernel/livepatch/core.c                     |   11 
 kernel/module.c                             |  310 +++++++++-------------------
 kernel/trace/trace_kprobe.c                 |    4 
 lib/bug.c                                   |    3 
 scripts/checkpatch.pl                       |    6 
 scripts/mod/modpost.c                       |   50 ----
 scripts/mod/modpost.h                       |    3 
 scripts/module.lds.S                        |    6 
 tools/include/linux/export.h                |    3 
 33 files changed, 142 insertions(+), 490 deletions(-)