Re: [PATCH v2 11/32] mips: reuse asm-generic/barrier.h
From: Peter Zijlstra <peterz@infradead.org>
Date: 2016-01-04 13:26:35
Also in:
linux-arch, linux-arm-kernel, linux-mips, linux-s390, linux-sh, linux-um, lkml, sparclinux
On Thu, Dec 31, 2015 at 09:07:10PM +0200, Michael S. Tsirkin wrote:
-#define smp_store_release(p, v) \
-do { \
- compiletime_assert_atomic_type(*p); \
- smp_mb(); \
- WRITE_ONCE(*p, v); \
-} while (0)
-
-#define smp_load_acquire(p) \
-({ \
- typeof(*p) ___p1 = READ_ONCE(*p); \
- compiletime_assert_atomic_type(*p); \
- smp_mb(); \
- ___p1; \
-})David Daney wanted to use fancy new MIPS barriers to provide better implementations of this. This patch isn't in the way of that, just a FYI.