[GIT PULL] Modules updates for v5.12

[Jessica Yu <jeyu@kernel.org>]

Hi Linus,

Please pull below to receive modules updates for the v5.12 merge window.
A summary can be found in the signed tag.

Thank you,

Jessica

---
The following changes since commit 19c329f6808995b142b3966301f217c831e7cf31:

   Linux 5.11-rc4 (2021-01-17 16:37:05 -0800)

are available in the Git repository at:

   git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux.git tags/modules-for-v5.12

for you to fetch changes up to 1e80d9cb579ed7edd121753eeccce82ff82521b4:

   module: potential uninitialized return in module_kallsyms_on_each_symbol() (2021-02-10 16:57:04 +0100)

----------------------------------------------------------------
Modules updates for v5.12

Summary of modules changes for the 5.12 merge window:

- Retire EXPORT_UNUSED_SYMBOL() and EXPORT_SYMBOL_GPL_FUTURE(). These export
   types were introduced between 2006 - 2008. All the of the unused symbols have
   been long removed and gpl future symbols were converted to gpl quite a long
   time ago, and I don't believe these export types have been used ever since.
   So, I think it should be safe to retire those export types now. (Christoph Hellwig)

- Refactor and clean up some aged code cruft in the module loader (Christoph Hellwig)

- Build {,module_}kallsyms_on_each_symbol only when livepatching is enabled, as
   it is the only caller (Christoph Hellwig)

- Unexport find_module() and module_mutex and fix the last module
   callers to not rely on these anymore. Make module_mutex internal to
   the module loader. (Christoph Hellwig)

- Harden ELF checks on module load and validate ELF structures before checking
   the module signature (Frank van der Linden)

- Fix undefined symbol warning for clang (Fangrui Song)

- Fix smatch warning (Dan Carpenter)

Signed-off-by: Jessica Yu <jeyu@kernel.org>

----------------------------------------------------------------
Christoph Hellwig (13):
       powerpc/powernv: remove get_cxl_module
       drm: remove drm_fb_helper_modinit
       module: unexport find_module and module_mutex
       module: use RCU to synchronize find_module
       kallsyms: refactor {,module_}kallsyms_on_each_symbol
       kallsyms: only build {,module_}kallsyms_on_each_symbol when required
       module: mark module_mutex static
       module: remove each_symbol_in_section
       module: merge each_symbol_section into find_symbol
       module: pass struct find_symbol_args to find_symbol
       module: move struct symsearch to module.c
       module: remove EXPORT_SYMBOL_GPL_FUTURE
       module: remove EXPORT_UNUSED_SYMBOL*

Dan Carpenter (1):
       module: potential uninitialized return in module_kallsyms_on_each_symbol()

Fangrui Song (1):
       module: Ignore _GLOBAL_OFFSET_TABLE_ when warning for undefined symbols

Frank van der Linden (1):
       module: harden ELF info handling

  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                     |   7 +-
  kernel/module.c                             | 481 ++++++++++++++--------------
  kernel/module_signature.c                   |   2 +-
  kernel/module_signing.c                     |   2 +-
  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 -
  35 files changed, 287 insertions(+), 516 deletions(-)