linux-kernel - [PATCH 0/3] Enable retpoline only when compiler support

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Date:   Mon, 29 Oct 2018 23:55:03 -0700 (PDT)
From:   Zhenzhong Duan <zhenzhong.duan@...cle.com>
To:     Linux-Kernel <linux-kernel@...r.kernel.org>
Cc:     Srinivas REDDY Eeda <srinivas.eeda@...cle.com>
Subject: [PATCH 0/3] Enable retpoline only when compiler support

According to Peter Zijlstra's suggestion in https://lkml.org/lkml/2018/9/18/1016,
hard bind retpoline with compiler support and remove minimal stuff.

Tested with both CONFIG_RETPOLIN_SUPPORT enabled and disabled.

Zhenzhong Duan (3):
  retpolines: Only enable retpoline when compiler support it
  retpolines: Remove the minimal stuff of retpoline support
  kprobes/x86: Simplify indirect-jump check in retpoline case

 Documentation/admin-guide/kernel-parameters.txt |  2 +-
 arch/x86/Kconfig                                |  8 ++++----
 arch/x86/Makefile                               |  5 +++--
 arch/x86/entry/vdso/Makefile                    |  4 ++--
 arch/x86/include/asm/nospec-branch.h            | 12 ++++++------
 arch/x86/kernel/cpu/bugs.c                      | 13 ++-----------
 arch/x86/kernel/kprobes/opt.c                   | 14 ++++++--------
 arch/x86/kernel/vmlinux.lds.S                   |  2 +-
 arch/x86/lib/Makefile                           |  2 +-
 arch/x86/lib/retpoline.S                        |  2 ++
 scripts/Makefile.build                          |  2 +-
 11 files changed, 29 insertions(+), 37 deletions(-)

-- 
1.8.3.1