netdev - [net-next PATCH 0/3] Replace wmb()/rmb() with dma_wmb()/dma

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Message-ID: <20150407235324.1574.63255.stgit@ahduyck-vm-fedora22>
Date:	Tue, 07 Apr 2015 16:55:08 -0700
From:	Alexander Duyck <alexander.h.duyck@...hat.com>
To:	netdev@...r.kernel.org
Cc:	davem@...emloft.net
Subject: [net-next PATCH 0/3] Replace wmb()/rmb() with dma_wmb()/dma_rmb()
 where appropriate

This is a start of a side project cleaning up the drivers that can make use
of the dma_wmb and dma_rmb calls.  The general idea is to start removing
the unnecessary wmb/rmb calls from a number of drivers and to make use of
the lighter weight dma_wmb/dma_rmb calls as this should allow for an
overall improvement in performance as each barrier can cost a significant
number of cycles and on architectures such as x86 this is unnecessary.

These changes are what I would consider low hanging fruit.  The likelihood
of the changes introducing an error should be low since the use of the
barriers in these cases are fairly obvious.

---

Alexander Duyck (3):
      sungem, sunhme, sunvnet: Update drivers to use dma_wmb/rmb
      s2io: Update driver to use dma_wmb
      e1000, e1000e: Use dma_rmb instead of rmb for descriptor read ordering

 drivers/net/ethernet/intel/e1000/e1000_main.c |    6 +++---
 drivers/net/ethernet/intel/e1000e/netdev.c    |    8 ++++----
 drivers/net/ethernet/neterion/s2io.c          |    8 ++++----
 drivers/net/ethernet/sun/sungem.c             |   14 +++++++-------
 drivers/net/ethernet/sun/sunhme.c             |   16 ++++++++--------
 drivers/net/ethernet/sun/sunvnet.c            |    6 +++---
 6 files changed, 29 insertions(+), 29 deletions(-)

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