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Re: [Xen-devel] [v3,11/41] mips: reuse asm-generic/barrier.h
- To: "Michael S. Tsirkin" <mst@xxxxxxxxxx>, <linux-kernel@xxxxxxxxxxxxxxx>
- From: Leonid Yegoshin <Leonid.Yegoshin@xxxxxxxxxx>
- Date: Mon, 11 Jan 2016 17:14:14 -0800
- Cc: linux-mips@xxxxxxxxxxxxxx, linux-ia64@xxxxxxxxxxxxxxx, linux-sh@xxxxxxxxxxxxxxx, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, 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>, Arnd Bergmann <arnd@xxxxxxxx>, x86@xxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, Ingo Molnar <mingo@xxxxxxx>, linux-xtensa@xxxxxxxxxxxxxxxx, user-mode-linux-devel@xxxxxxxxxxxxxxxxxxxxx, Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>, adi-buildroot-devel@xxxxxxxxxxxxxxxxxxxxx, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, linux-metag@xxxxxxxxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Ralf Baechle <ralf@xxxxxxxxxxxxxx>, Joe Perches <joe@xxxxxxxxxxx>, linuxppc-dev@xxxxxxxxxxxxxxxx, David Miller <davem@xxxxxxxxxxxxx>
- Delivery-date: Tue, 12 Jan 2016 04:52:22 +0000
- List-id: Xen developer discussion <xen-devel.lists.xen.org>
On 01/10/2016 06:18 AM, Michael S. Tsirkin wrote:
On mips dma_rmb, dma_wmb, smp_store_mb, read_barrier_depends,
smp_read_barrier_depends, smp_store_release and smp_load_acquire match
the asm-generic variants exactly. Drop the local definitions and pull in
asm-generic/barrier.h instead.
This statement doesn't fit MIPS barriers variations. Moreover, there is
a reason to extend that even more specific, at least for
smp_store_release and smp_load_acquire, look into
http://patchwork.linux-mips.org/patch/10506/
- Leonid.
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