linux-kernel - [PATCH 0/6] fs: deduplicate compat logic

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Date:   Mon, 11 Jan 2021 19:30:11 -0500
From:   Willem de Bruijn <willemdebruijn.kernel@...il.com>
To:     linux-fsdevel@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, viro@...iv.linux.org.uk,
        akpm@...ux-foundation.org, willy@...radead.org, arnd@...nel.org,
        Willem de Bruijn <willemb@...gle.com>
Subject: [PATCH 0/6] fs: deduplicate compat logic

From: Willem de Bruijn <willemb@...gle.com>

Use in_compat_syscall() to differentiate compat handling exactly
where needed, including in nested function calls. Then remove
duplicated code in callers.

Changes
  RFC[1]->v1
  - remove kselftest dependency on variant support in teardown
    (patch is out for review, not available in linux-next/akpm yet)
  - add patch 5: deduplicate set_user_sigmask compat handling
  - add patch 6: deduplicate io_pgetevents sigmask compat handling

[1] RFC: https://github.com/wdebruij/linux-next-mirror/tree/select-compat-1

Willem de Bruijn (6):
  selftests/filesystems: add initial select and poll selftest
  select: deduplicate compat logic
  ppoll: deduplicate compat logic
  epoll: deduplicate compat logic
  compat: add set_maybe_compat_user_sigmask helper
  io_pgetevents: deduplicate compat logic

 fs/aio.c                                      |  94 ++---
 fs/eventpoll.c                                |  35 +-
 fs/io_uring.c                                 |   9 +-
 fs/select.c                                   | 339 +++++-------------
 include/linux/compat.h                        |  10 +
 .../testing/selftests/filesystems/.gitignore  |   1 +
 tools/testing/selftests/filesystems/Makefile  |   2 +-
 .../selftests/filesystems/selectpoll.c        | 207 +++++++++++
 8 files changed, 344 insertions(+), 353 deletions(-)
 create mode 100644 tools/testing/selftests/filesystems/selectpoll.c

-- 
2.30.0.284.gd98b1dd5eaa7-goog