[PATCH v4 0/4] compat: remove compat_alloc_user_space callers

[Arnd Bergmann]

From: Arnd Bergmann <arnd@xxxxxxxx>

Going through compat_alloc_user_space() to convert indirect system call
arguments tends to add complexity compared to handling the native and
compat logic in the same code.

The drivers/media portion of the longer series is already merged,
and I just resubmitted the net/core and drivers/net portions, so this
is the last main bit.

       Arnd
---

Changes in v4:

- Rebase to v5.14-rc2
- Replace the kexec patch with a version based on Eric Biederman's
  prototype

Changes in v3:

- fix whitespace as pointed out by Christoph Hellwig
- minor build fixes
- rebase to v5.13-rc1

Link: https://lore.kernel.org/lkml/20210517203343.3941777-1-arnd@xxxxxxxxxx/

Changes in v2:

- address review comments from Christoph Hellwig
- split syscall removal into a separate patch
- replace __X32_COND_SYSCALL() with individual macros for x32

Link: https://lore.kernel.org/lkml/20201208150614.GA15765@xxxxxxxxxxxxx/

Arnd Bergmann (4):
  kexec: avoid compat_alloc_user_space
  mm: simplify compat_sys_move_pages
  mm: simplify compat numa syscalls
  compat: remove some compat entry points

 arch/arm64/include/asm/unistd32.h         |  10 +-
 arch/mips/kernel/syscalls/syscall_n32.tbl |  10 +-
 arch/mips/kernel/syscalls/syscall_o32.tbl |  10 +-
 arch/parisc/kernel/syscalls/syscall.tbl   |   8 +-
 arch/powerpc/kernel/syscalls/syscall.tbl  |  10 +-
 arch/s390/kernel/syscalls/syscall.tbl     |  10 +-
 arch/sparc/kernel/syscalls/syscall.tbl    |  10 +-
 arch/x86/entry/syscalls/syscall_32.tbl    |   4 +-
 arch/x86/entry/syscalls/syscall_64.tbl    |   2 +-
 include/linux/compat.h                    |  37 +---
 include/uapi/asm-generic/unistd.h         |  10 +-
 kernel/kexec.c                            | 116 ++++++-------
 kernel/sys_ni.c                           |   5 -
 mm/mempolicy.c                            | 196 +++++-----------------
 mm/migrate.c                              |  50 +++---
 15 files changed, 182 insertions(+), 306 deletions(-)

-- 
2.29.2

Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Cc: linux-arch <linux-arch@xxxxxxxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxx
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Brian Gerst <brgerst@xxxxxxxxx>
Cc: Eric Biederman <ebiederm@xxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Linux ARM <linux-arm-kernel@xxxxxxxxxxxxxxxxxxx>
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: Linux-MM <linux-mm@xxxxxxxxx>
Cc: kexec@xxxxxxxxxxxxxxxxxxx