[PATCH v4 0/3] ppc64le: Add REL24 relocation support of livepatch symbols

[Kamalesh Babulal]

This patchset drop the approach of creating new stub type for livepatch
symbols and offloads the issue of handling local function becoming global
to kpatch tool via gcc-plugin.

In function restore_r2(), a check for sibling call is added and also
improves the error message on unexpected op-code.

v4:
 - Drop creation of stubs for livepatch symbols and offload solution
   to kpatch tool.
 - Introduce check for sibling call, when restoring r2 after branch. (Josh)
 - Improve error message in restore_r2(). (Josh)

v3:
 - Defined FUNC_DESC_OFFSET to calculate func_desc offset from
   struct ppc64le_klp_stub_entry.
 - Replaced BUG_ON() with WARN_ON() in klp_stub_for_addr().
 - Major commit message re-write.

v2:
 - Changed klp_stub construction to re-use livepatch_handler and
   additional patch code required for klp_stub, instead of duplicating it.
 - Minor comments and commit body edit.

Josh Poimboeuf (2):
  powerpc/modules: Don't try to restore r2 after a sibling call
  powerpc/modules: Improve restore_r2() error message

Kamalesh Babulal (1):
  kernel/modules: Add REL24 relocation support of livepatch symbols

 arch/powerpc/kernel/module_64.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

-- 
2.9.3