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Re: [Xen-devel] [v3,11/41] mips: reuse asm-generic/barrier.h
- To: "Paul E. McKenney" <paulmck@xxxxxxxxxxxxxxxxxx>
- From: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
- Date: Tue, 26 Jan 2016 11:32:00 +0100
- Cc: linux-mips@xxxxxxxxxxxxxx, linux-ia64@xxxxxxxxxxxxxxx, "Michael S. Tsirkin" <mst@xxxxxxxxxx>, Will Deacon <will.deacon@xxxxxxx>, virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx, "H. Peter Anvin" <hpa@xxxxxxxxx>, sparclinux@xxxxxxxxxxxxxxx, Ingo Molnar <mingo@xxxxxxxxxx>, linux-arch@xxxxxxxxxxxxxxx, linux-s390@xxxxxxxxxxxxxxx, Russell King - ARM Linux <linux@xxxxxxxxxxxxxxxx>, user-mode-linux-devel@xxxxxxxxxxxxxxxxxxxxx, linux-sh@xxxxxxxxxxxxxxx, Michael Ellerman <mpe@xxxxxxxxxxxxxx>, x86@xxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, Ingo Molnar <mingo@xxxxxxx>, linux-xtensa@xxxxxxxxxxxxxxxx, james.hogan@xxxxxxxxxx, Arnd Bergmann <arnd@xxxxxxxx>, Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>, adi-buildroot-devel@xxxxxxxxxxxxxxxxxxxxx, Leonid Yegoshin <Leonid.Yegoshin@xxxxxxxxxx>, ddaney.cavm@xxxxxxxxx, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, linux-metag@xxxxxxxxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, Ralf Baechle <ralf@xxxxxxxxxxxxxx>, Joe Perches <joe@xxxxxxxxxxx>, linuxppc-dev@xxxxxxxxxxxxxxxx, David Miller <davem@xxxxxxxxxxxxx>
- Delivery-date: Tue, 26 Jan 2016 10:32:30 +0000
- List-id: Xen developer discussion <xen-devel.lists.xen.org>
On Tue, Jan 26, 2016 at 11:24:02AM +0100, Peter Zijlstra wrote:
> Yeah, this goes under the header: memory-barriers.txt is _NOT_ a
> specification (I seem to keep repeating this).
Do we want this ?
---
Documentation/memory-barriers.txt | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/Documentation/memory-barriers.txt
b/Documentation/memory-barriers.txt
index a61be39c7b51..433326ebdc26 100644
--- a/Documentation/memory-barriers.txt
+++ b/Documentation/memory-barriers.txt
@@ -1,3 +1,4 @@
+
============================
LINUX KERNEL MEMORY BARRIERS
============================
@@ -5,6 +6,22 @@
By: David Howells <dhowells@xxxxxxxxxx>
Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
+==========
+DISCLAIMER
+==========
+
+This document is not a specification; it is intentionally (for the sake of
+brevity) and unintentionally (due to being human) incomplete. This document is
+meant as a guide to using the various memory barriers provided by Linux, but
+in case of any doubt (and there are many) please ask.
+
+I repeat, this document is not a specification of what Linux expects from
+hardware.
+
+=====
+INDEX
+=====
+
Contents:
(*) Abstract memory access model.
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- References:
- Re: [Xen-devel] [v3,11/41] mips: reuse asm-generic/barrier.h
- Re: [Xen-devel] [v3,11/41] mips: reuse asm-generic/barrier.h
- Re: [Xen-devel] [v3,11/41] mips: reuse asm-generic/barrier.h
- Re: [Xen-devel] [v3,11/41] mips: reuse asm-generic/barrier.h
- Re: [Xen-devel] [v3,11/41] mips: reuse asm-generic/barrier.h
- Re: [Xen-devel] [v3,11/41] mips: reuse asm-generic/barrier.h
- Re: [Xen-devel] [v3,11/41] mips: reuse asm-generic/barrier.h
- Re: [Xen-devel] [v3,11/41] mips: reuse asm-generic/barrier.h
- Re: [Xen-devel] [v3,11/41] mips: reuse asm-generic/barrier.h
- Re: [Xen-devel] [v3,11/41] mips: reuse asm-generic/barrier.h
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