[PATCH v2 20/32] metag: define __smp_xxx
From: peterz@infradead.org (Peter Zijlstra)
Date: 2016-01-04 13:41:54
Also in:
linux-arch, linux-mips, linux-s390, linux-sh, linux-um, linuxppc-dev, lkml, sparclinux, virtualization
On Thu, Dec 31, 2015 at 09:08:22PM +0200, Michael S. Tsirkin wrote:
+#ifdef CONFIG_SMP
+#define fence() metag_fence()
+#else
+#define fence() do { } while (0)
#endifJames, it strikes me as odd that fence() is a no-op instead of a barrier() for UP, can you verify/explain?