linux-kernel - [GIT PULL] objtool changes for v5.14

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Message-ID: <YNlkrfFqO/bsKq5D@gmail.com>
Date:   Mon, 28 Jun 2021 07:57:01 +0200
From:   Ingo Molnar <mingo@...nel.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org, Josh Poimboeuf <jpoimboe@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: [GIT PULL] objtool changes for v5.14

Linus,

Please pull the latest objtool/core git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git objtool-core-2021-06-28

   # HEAD: d33b9035e14a35f6f2a5f067f0b156a93581811d objtool: Improve reloc hash size guestimate

The biggest change in this cycle is the new code to handle
and rewrite variable sized jump labels - which results in
slightly tighter code generation in hot paths, through the
use of short(er) NOPs.

Also a number of cleanups and fixes, and a change to the
generic include/linux/compiler.h to handle a s390 GCC quirk.

 Thanks,

	Ingo

------------------>
Josh Poimboeuf (1):
      kbuild: Fix objtool dependency for 'OBJECT_FILES_NON_STANDARD_<obj> := n'

Peter Zijlstra (16):
      objtool: Rewrite hashtable sizing
      x86, objtool: Dont exclude arch/x86/realmode/
      jump_label, x86: Strip ASM jump_label support
      jump_label, x86: Factor out the __jump_table generation
      jump_label, x86: Improve error when we fail expected text
      jump_label, x86: Introduce jump_entry_size()
      jump_label, x86: Add variable length patching support
      jump_label: Free jump_entry::key bit1 for build use
      jump_label, x86: Emit short JMP
      objtool: Decode jump_entry::key addend
      objtool: Rewrite jump_label instructions
      objtool: Provide stats for jump_labels
      jump_label, x86: Allow short NOPs
      jump_label/x86: Remove unused JUMP_LABEL_NOP_SIZE
      objtool: Reflow handle_jump_alt()
      objtool: Improve reloc hash size guestimate

Vasily Gorbik (2):
      compiler.h: Avoid using inline asm operand modifiers
      instrumentation.h: Avoid using inline asm operand modifiers


 arch/x86/include/asm/jump_label.h             |  79 +++++++-----------
 arch/x86/kernel/jump_label.c                  |  81 ++++++++++++-------
 arch/x86/realmode/Makefile                    |   1 -
 include/linux/compiler.h                      |  22 ++++--
 include/linux/instrumentation.h               |  20 +++--
 include/linux/jump_label.h                    |  16 +++-
 kernel/jump_label.c                           |  12 +--
 scripts/Makefile.build                        |   5 +-
 tools/objtool/arch/x86/include/arch/special.h |   1 +
 tools/objtool/check.c                         |  38 ++++++++-
 tools/objtool/elf.c                           | 110 ++++++++++++++++----------
 tools/objtool/include/objtool/elf.h           |  18 +++--
 tools/objtool/include/objtool/objtool.h       |   3 +
 tools/objtool/include/objtool/special.h       |   1 +
 tools/objtool/special.c                       |  14 ++++
 15 files changed, 267 insertions(+), 154 deletions(-)