Re: [RFC PATCH 00/16] Replace smp_read_barrier_depends() with lockless_derefrence()

On Thu, Nov 13, 2014 at 02:24:06PM -0500, Pranith Kumar wrote:

Recently lockless_dereference() was added which can be used in place of
hard-coding smp_read_barrier_depends(). 

http://lkml.iu.edu/hypermail/linux/kernel/1410.3/04561.html

The following series tries to do this.

There are still some hard-coded locations which I was not sure how to replace
with. I will send in separate patches/questions regarding them.

Thank you for taking this on!  Some questions and comments in response
to the individual patches.

							Thanx, Paul

Pranith Kumar (16):
  crypto: caam - Remove unnecessary smp_read_barrier_depends()
  doc: memory-barriers.txt: Document use of lockless_dereference()
  drivers: dma: Replace smp_read_barrier_depends() with
    lockless_dereference()
  dcache: Replace smp_read_barrier_depends() with lockless_dereference()
  overlayfs: Replace smp_read_barrier_depends() with
    lockless_dereference()
  assoc_array: Replace smp_read_barrier_depends() with
    lockless_dereference()
  hyperv: Replace smp_read_barrier_depends() with lockless_dereference()
  rcupdate: Replace smp_read_barrier_depends() with
    lockless_dereference()
  percpu: Replace smp_read_barrier_depends() with lockless_dereference()
  perf: Replace smp_read_barrier_depends() with lockless_dereference()
  seccomp: Replace smp_read_barrier_depends() with
    lockless_dereference()
  task_work: Replace smp_read_barrier_depends() with
    lockless_dereference()
  ksm: Replace smp_read_barrier_depends() with lockless_dereference()
  slab: Replace smp_read_barrier_depends() with lockless_dereference()
  netfilter: Replace smp_read_barrier_depends() with
    lockless_dereference()
  rxrpc: Replace smp_read_barrier_depends() with lockless_dereference()

 Documentation/memory-barriers.txt |  2 +-
 drivers/crypto/caam/jr.c          |  3 ---
 drivers/dma/ioat/dma_v2.c         |  3 +--
 drivers/dma/ioat/dma_v3.c         |  3 +--
 fs/dcache.c                       |  7 ++-----
 fs/overlayfs/super.c              |  4 +---
 include/linux/assoc_array_priv.h  | 11 +++++++----
 include/linux/hyperv.h            |  9 ++++-----
 include/linux/percpu-refcount.h   |  4 +---
 include/linux/rcupdate.h          | 10 +++++-----
 kernel/events/core.c              |  3 +--
 kernel/events/uprobes.c           |  8 ++++----
 kernel/seccomp.c                  |  7 +++----
 kernel/task_work.c                |  3 +--
 lib/assoc_array.c                 |  7 -------
 mm/ksm.c                          |  7 +++----
 mm/slab.h                         |  6 +++---
 net/ipv4/netfilter/arp_tables.c   |  3 +--
 net/ipv4/netfilter/ip_tables.c    |  3 +--
 net/ipv6/netfilter/ip6_tables.c   |  3 +--
 net/rxrpc/ar-ack.c                | 22 +++++++++-------------
 security/keys/keyring.c           |  6 ------
 22 files changed, 50 insertions(+), 84 deletions(-)

-- 
1.9.1

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