linux-kernel - [PATCH 0/4] lib/iov_iter: Fixes and documentation for pmem user copies

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Date:   Sun, 08 Jul 2018 13:45:57 -0700
From:   Dan Williams <dan.j.williams@...el.com>
To:     mingo@...nel.org
Cc:     Tony Luck <tony.luck@...el.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Borislav Petkov <bp@...en8.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ross Zwisler <ross.zwisler@...ux.intel.com>,
        Andy Lutomirski <luto@...capital.net>,
        Al Viro <viro@...iv.linux.org.uk>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel@...r.kernel.org, x86@...nel.org
Subject: [PATCH 0/4] lib/iov_iter: Fixes and documentation for pmem user
 copies

* Add missing documentation for the 'flushcache' operation for writing to
  persistent memory, and the 'mcsafe' operation for reading from
  potentially poisoned persistent memory.

* Introduce copy_pipe_to_iter_mcsafe() to properly handle ITER_PIPE for
  _copy_to_iter_mcsafe().

* Make sure copy_to_user_mcsafe() falls back to an exception handling
  capable copy routine, not plain memcpy().

---

Dan Williams (4):
      lib/iov_iter: Document _copy_to_iter_mcsafe()
      lib/iov_iter: Document _copy_to_iter_flushcache()
      lib/iov_iter: Fix pipe handling in _copy_to_iter_mcsafe
      x86/asm/memcpy_mcsafe: Fix copy_to_user_mcsafe() exception handling


 arch/x86/Kconfig                  |    2 -
 arch/x86/include/asm/uaccess_64.h |    7 +++
 lib/iov_iter.c                    |   77 +++++++++++++++++++++++++++++++++++--
 3 files changed, 80 insertions(+), 6 deletions(-)