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From: Andrea Parri <andrea.parri@amarulasolutions.com>
To: linux-kernel@vger.kernel.org
Cc: Andrea Parri <andrea.parri@amarulasolutions.com>,
	"Paul E. McKenney" <paulmck@linux.ibm.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Rob Clark <robdclark@gmail.com>, Sean Paul <sean@poorly.run>,
	David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
	Jordan Crouse <jcrouse@codeaurora.org>,
	Jens Axboe <axboe@kernel.dk>, Omar Sandoval <osandov@fb.com>,
	"Yan, Zheng" <zyan@redhat.com>, Sage Weil <sage@redhat.com>,
	Ilya Dryomov <idryomov@gmail.com>,
	Dennis Dalessandro <dennis.dalessandro@intel.com>,
	Mike Marciniszyn <mike.marciniszyn@intel.com>,
	Doug Ledford <dledford@redhat.com>,
	Jason Gunthorpe <jgg@ziepe.ca>
Subject: [PATCH 0/5] Fix improper uses of smp_mb__{before,after}_atomic()
Date: Mon, 29 Apr 2019 22:14:56 +0200	[thread overview]
Message-ID: <1556568902-12464-1-git-send-email-andrea.parri@amarulasolutions.com> (raw)

Hello!

A relatively common misuse of these barriers is to apply these to
operations which are not read-modify-write operations, such as
atomic_set() and atomic_read(); examples were discussed in [1].

This series attempts to fix those uses by (conservatively) replacing
the smp_mb__{before,after}_atomic() barriers with full memory barriers.

Applies on 5.1-rc7.

Thanks,
  Andrea

Cc: "Paul E. McKenney" <paulmck@linux.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rob Clark <robdclark@gmail.com>
Cc: Sean Paul <sean@poorly.run>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Jordan Crouse <jcrouse@codeaurora.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Omar Sandoval <osandov@fb.com>
Cc: "Yan, Zheng" <zyan@redhat.com>
Cc: Sage Weil <sage@redhat.com>
Cc: Ilya Dryomov <idryomov@gmail.com>
Cc: Dennis Dalessandro <dennis.dalessandro@intel.com>
Cc: Mike Marciniszyn <mike.marciniszyn@intel.com>
Cc: Doug Ledford <dledford@redhat.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>

[1] http://lkml.kernel.org/r/20190420085440.GK14111@linux.ibm.com

Andrea Parri (5):
  drm/msm: Fix improper uses of smp_mb__{before,after}_atomic()
  bio: fix improper use of smp_mb__before_atomic()
  sbitmap: fix improper use of smp_mb__before_atomic()
  ceph: fix improper use of smp_mb__before_atomic()
  IB/hfi1: Fix improper uses of smp_mb__before_atomic()

 drivers/gpu/drm/msm/adreno/a5xx_preempt.c | 4 ++--
 drivers/infiniband/sw/rdmavt/qp.c         | 6 +++---
 fs/ceph/super.h                           | 2 +-
 include/linux/bio.h                       | 2 +-
 lib/sbitmap.c                             | 2 +-
 5 files changed, 8 insertions(+), 8 deletions(-)

-- 
2.7.4


             reply	other threads:[~2019-04-29 20:15 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-29 20:14 Andrea Parri [this message]
2019-04-29 20:14 ` [PATCH 1/5] drm/msm: " Andrea Parri
2019-05-09 20:19   ` Andrea Parri
2019-04-29 20:14 ` [PATCH 2/5] bio: fix improper use of smp_mb__before_atomic() Andrea Parri
2019-04-30  8:21   ` Peter Zijlstra
2019-05-09 20:23   ` Andrea Parri
2019-05-10  3:40   ` Ming Lei
2019-04-29 20:14 ` [PATCH 3/5] sbitmap: " Andrea Parri
2019-05-09 20:26   ` Andrea Parri
2019-05-10  3:41   ` Ming Lei
2019-05-10  6:27     ` Andrea Parri
2019-04-29 20:15 ` [PATCH 4/5] ceph: " Andrea Parri
2019-04-30  8:23   ` Peter Zijlstra
2019-04-30  9:08     ` Yan, Zheng
2019-05-09 20:55       ` Andrea Parri
2019-05-13 13:04         ` Yan, Zheng
2019-05-13 22:47           ` Andrea Parri
2019-04-29 20:15 ` [PATCH 5/5] IB/hfi1: Fix improper uses " Andrea Parri
2019-04-29 21:24   ` Ruhl, Michael J
2019-04-29 23:16     ` Andrea Parri
2019-05-09 21:12       ` Andrea Parri
2019-05-14 12:32         ` Dennis Dalessandro
2019-05-14 14:48           ` Andrea Parri
2019-04-30  8:28   ` Peter Zijlstra
2019-04-30  8:34 ` [PATCH 0/5] Fix improper uses of smp_mb__{before,after}_atomic() Peter Zijlstra
2019-04-30 16:44   ` Andrea Parri

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