From: David Vrabel <david.vrabel@citrix.com>
To: Christian Borntraeger <borntraeger@de.ibm.com>,
<linux-kernel@vger.kernel.org>
Cc: linux-arch@vger.kernel.org, kvm@vger.kernel.org, x86@kernel.org,
kvm-ppc@vger.kernel.org, linux-mm@kvack.org,
xen-devel@lists.xenproject.org, linuxppc-dev@lists.ozlabs.org
Subject: Re: [Xen-devel] [PATCH 3/8] x86/xen/p2m: Replace ACCESS_ONCE with READ_ONCE
Date: Thu, 15 Jan 2015 10:43:40 +0000 [thread overview]
Message-ID: <54B799DC.1050008@citrix.com> (raw)
In-Reply-To: <1421312314-72330-4-git-send-email-borntraeger@de.ibm.com>
On 15/01/15 08:58, Christian Borntraeger wrote:
> ACCESS_ONCE does not work reliably on non-scalar types. For
> example gcc 4.6 and 4.7 might remove the volatile tag for such
> accesses during the SRA (scalar replacement of aggregates) step
> (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58145)
>
> Change the p2m code to replace ACCESS_ONCE with READ_ONCE.
Acked-by: David Vrabel <david.vrabel@citrix.com>
Let me know if you want me to merge this via the Xen tree.
David
next prev parent reply other threads:[~2015-01-15 10:54 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-15 8:58 [PATCH 0/8] current ACCESS_ONCE patch queue Christian Borntraeger
2015-01-15 8:58 ` [PATCH 1/8] ppc/kvm: Replace ACCESS_ONCE with READ_ONCE Christian Borntraeger
2015-01-15 23:09 ` Michael Ellerman
2015-01-16 9:43 ` Christian Borntraeger
2015-01-15 8:58 ` [PATCH 2/8] ppc/hugetlbfs: " Christian Borntraeger
2015-01-15 8:58 ` [PATCH 3/8] x86/xen/p2m: " Christian Borntraeger
2015-01-15 9:26 ` Jürgen Groß
2015-01-15 10:43 ` David Vrabel [this message]
2015-01-15 11:07 ` [Xen-devel] " Christian Borntraeger
2015-01-15 8:58 ` [PATCH 4/8] x86/spinlock: Leftover conversion ACCESS_ONCE->READ_ONCE Christian Borntraeger
2015-01-15 19:38 ` Oleg Nesterov
2015-01-15 19:51 ` Christian Borntraeger
2015-01-15 20:01 ` Oleg Nesterov
2015-01-15 21:00 ` Christian Borntraeger
2015-01-15 8:58 ` [PATCH 5/8] mm/gup: Replace ACCESS_ONCE with READ_ONCE Christian Borntraeger
2015-01-15 8:58 ` [PATCH 6/8] kernel: tighten rules for ACCESS ONCE Christian Borntraeger
2015-01-15 8:58 ` [PATCH 7/8] next: sh: Fix compile error Christian Borntraeger
2015-01-15 8:58 ` [PATCH 8/8] kernel: Fix sparse warning for ACCESS_ONCE Christian Borntraeger
2015-01-16 12:12 ` [PATCH 0/8] current ACCESS_ONCE patch queue Alexander Graf
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