Re: [PATCH v2 11/32] mips: reuse asm-generic/barrier.h

From	Peter Zijlstra <peterz@infradead.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH v2 11/32] mips: reuse asm-generic/barrier.h
Date	2016-01-04 14:30 +0100
Message-ID	<qNdmW-40K-7@gated-at.bofh.it> (permalink)
References	<qLQLL-8pu-3@gated-at.bofh.it> <qLQLL-8pu-9@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Show all headers | View raw

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.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next | Find similar | Unroll thread

Thread

Re: [PATCH v2 11/32] mips: reuse asm-generic/barrier.h Peter Zijlstra <peterz@infradead.org> - 2016-01-04 14:30 +0100

csiph-web