Messages in this thread | | | Date | Wed, 12 Nov 2014 15:43:41 -0500 (EST) | Subject | Re: [PATCH] arch: Introduce read_acquire() | From | David Miller <> |
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From: Alexander Duyck <alexander.h.duyck@redhat.com> Date: Tue, 11 Nov 2014 13:12:32 -0800
> The architectures I need to sort out are arm, x86, sparc, ia64, and > s390 as they are the only ones that tried to make use of the > smp_load_acquire logic.
On sparc64, you don't have to worry about anything really.
Only mb() does anything. The cpus execute in a reasonably strict memory ordering mode, and that's why rmb/wmb and friends are simply nops with a compiler barrier.
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