linux-kernel - [PATCH v2 00/12] powerpc: Cleanup use of 'struct ppc

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Message-Id: <cover.1621516826.git.christophe.leroy@csgroup.eu>
Date:   Thu, 20 May 2021 13:50:37 +0000 (UTC)
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        naveen.n.rao@...ux.vnet.ibm.com, jniethe5@...il.com
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH v2 00/12] powerpc: Cleanup use of 'struct ppc_inst'

This series is a cleanup of the use of 'struct ppc_inst'.

A confusion is made between internal representation of powerpc
instructions with 'struct ppc_inst' and in-memory code which is
and will always be an array of 'unsigned int'.

This series cleans it up.

First patch is fixing detection of missing '__user' flag by sparse
when using get_user_instr().

Last part of the series does some source code cleanup in
optprobes, it is put at the ends of this series because of
clashes with the 'struct ppc_inst' cleanups.

Changes in v2:
- Temporarily don't use get_op() and don't include asm/disassemble.h in asm/inst.h because it exhibits a conflict for function get_ra() with drivers/staging/rtl8723bs/include/wifi.h
- Fix a create_branch() in ftrace and take copy_inst_from_kernel_nofault() into account

Christophe Leroy (12):
  powerpc/inst: Fix sparse detection on get_user_instr()
  powerpc/inst: Reduce casts in get_user_instr()
  powerpc/inst: Improve readability of get_user_instr() and friends
  powerpc/inst: Avoid pointer dereferencing in ppc_inst_equal()
  powerpc: Do not dereference code as 'struct ppc_inst' (uprobe,
    code-patching, feature-fixups)
  powerpc/lib/code-patching: Make instr_is_branch_to_addr() static
  powerpc/lib/code-patching: Don't use struct 'ppc_inst' for runnable
    code in tests.
  powerpc: Don't use 'struct ppc_inst' to reference instruction location
  powerpc/inst: Refactor PPC32 and PPC64 versions
  powerpc/optprobes: Minimise casts
  powerpc/optprobes: Compact code source a bit.
  powerpc/optprobes: use PPC_RAW_ macros

 arch/powerpc/include/asm/code-patching.h  |  23 ++-
 arch/powerpc/include/asm/inst.h           |  92 +++++-------
 arch/powerpc/include/asm/ppc-opcode.h     |  11 +-
 arch/powerpc/include/asm/uprobes.h        |   4 +-
 arch/powerpc/kernel/crash_dump.c          |   4 +-
 arch/powerpc/kernel/epapr_paravirt.c      |   4 +-
 arch/powerpc/kernel/jump_label.c          |   2 +-
 arch/powerpc/kernel/kgdb.c                |   6 +-
 arch/powerpc/kernel/kprobes.c             |  17 ++-
 arch/powerpc/kernel/mce_power.c           |   2 +-
 arch/powerpc/kernel/optprobes.c           | 124 +++++-----------
 arch/powerpc/kernel/setup_32.c            |   2 +-
 arch/powerpc/kernel/trace/ftrace.c        |  33 +++--
 arch/powerpc/kernel/uprobes.c             |   6 +-
 arch/powerpc/lib/code-patching.c          | 165 ++++++++++++----------
 arch/powerpc/lib/feature-fixups.c         |  98 ++++++-------
 arch/powerpc/mm/maccess.c                 |   4 +-
 arch/powerpc/perf/core-book3s.c           |   4 +-
 arch/powerpc/platforms/86xx/mpc86xx_smp.c |   2 +-
 arch/powerpc/platforms/powermac/smp.c     |   4 +-
 arch/powerpc/xmon/xmon.c                  |  10 +-
 21 files changed, 277 insertions(+), 340 deletions(-)

-- 
2.25.0