linux-kernel - [PATCH 00/16] x86/asm changes for 4.1 for review

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Date:	Thu, 26 Feb 2015 14:40:23 -0800
From:	Andy Lutomirski <luto@...capital.net>
To:	x86@...nel.org, linux-kernel@...r.kernel.org
Cc:	Borislav Petkov <bp@...en8.de>, Oleg Nesterov <oleg@...hat.com>,
	Denys Vlasenko <dvlasenk@...hat.com>,
	Andy Lutomirski <luto@...capital.net>
Subject: [PATCH 00/16] x86/asm changes for 4.1 for review

Hi all-

After much handwringing, painful review, and curation, here's round 1 of
the x86/asm changes.  (This is not intended to imply that there will or
will not be a round 2.)

For ease of review for git users:

The following changes since commit 7453311d68f16a5c587c3cbf19563c9a4fbbd41a:

  Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip (2015-02-09 17:16:44 -0800)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/luto/linux.git 

for you to fetch changes up to 4710be56d76ef994ddf59087aad98c000fbab9a4:

  x86_64, entry: Remove a bogus ret_from_fork optimization (2015-02-26 07:09:36 -0800)

Ingo, if you like these, feel free to pull.  I will try to review the scary
change *again* this evening if I have time.  In the mean time, these are
queued as is for -next.  I will remove them from my -next branch if they
turn out to be buggy or if they end up in -tip in any form.

Andy Lutomirski (2):
  x86, entry: Remove int_check_syscall_exit_work
  x86_64, entry: Remove a bogus ret_from_fork optimization

Denys Vlasenko (14):
  x86: open-code register save/restore in trace_hardirqs thunks
  x86: introduce push/pop macros which generate CFI_REL_OFFSET and
    CFI_RESTORE
  x86: entry_64.S: fix wrong symbolic constant usage: R11->ARGOFFSET
  x86: entry_64.S: always allocate complete "struct pt_regs"
  x86: entry_64.S: fix comments. No code changes
  x86: code shrink in paranoid_exit
  x86: mass removal of ARGOFFSET. No code changes
  x86: add comments about various syscall instructions, no code changes
  x86: entry_64.S: move save_paranoid and ret_from_fork closer to their
    users
  x86: entry_64.S: rename save_paranoid to paranoid_entry, no code
    changes
  x86: ia32entry.S: fold IA32_ARG_FIXUP macro into its callers
  x86: entry_64.S: use more understandable constants
  x86: ia32entry.S: use more understandable constant
  x86: entry.S: simplify optimistic SYSRET

 arch/x86/ia32/ia32entry.S              | 342 ++++++++++++----------
 arch/x86/include/asm/calling.h         | 267 ++++++++---------
 arch/x86/include/asm/dwarf2.h          |  24 ++
 arch/x86/include/asm/irqflags.h        |   4 +-
 arch/x86/include/asm/ptrace.h          |  13 +-
 arch/x86/include/uapi/asm/ptrace-abi.h |  16 +-
 arch/x86/include/uapi/asm/ptrace.h     |  13 +-
 arch/x86/kernel/entry_32.S             |  21 +-
 arch/x86/kernel/entry_64.S             | 510 ++++++++++++++++-----------------
 arch/x86/lib/atomic64_cx8_32.S         |  50 ++--
 arch/x86/lib/checksum_32.S             |  60 ++--
 arch/x86/lib/msr-reg.S                 |  24 +-
 arch/x86/lib/rwsem.S                   |  44 ++-
 arch/x86/lib/thunk_32.S                |  18 +-
 arch/x86/lib/thunk_64.S                |  28 +-
 15 files changed, 724 insertions(+), 710 deletions(-)

-- 
2.1.0

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