barriers in mutexes?
From: Russell King - ARM Linux <hidden>
Date: 2011-02-03 11:08:37
On Wed, Feb 02, 2011 at 06:05:46PM -0800, Steve Muckle wrote:
Hello, Looking at kernel/mutex.c and arch/arm/include/asm/mutex.h, it appears there aren't any memory barriers in the fast path of mutexes. I see this was discussed here a long time back: http://patchwork.kernel.org/patch/25856/ How was this resolved?
bac4e96 ([ARM] barriers: improve xchg, bitops and atomic SMP barriers)