Paul E. McKenney 5af4692a75 smp: Make control dependencies work on Alpha, improve documentation ... The current formulation of control dependencies fails on DEC Alpha, which does not respect dependencies of any kind unless an explicit memory barrier is provided. This means that the current fomulation of control dependencies fails on Alpha. This commit therefore creates a READ_ONCE_CTRL() that has the same overhead on non-Alpha systems, but causes Alpha to produce the needed ordering. This commit also applies READ_ONCE_CTRL() to the one known use of control dependencies. Use of READ_ONCE_CTRL() also has the beneficial effect of adding a bit of self-documentation to control dependencies. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>		2015-05-27 12:58:02 -07:00
..
callchain.c	Merge branch 'for-3.18-consistent-ops' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu	2014-10-15 07:48:18 +02:00
core.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2015-04-15 09:00:47 -07:00
hw_breakpoint.c	perf: Remove type specific target pointers	2015-03-23 10:58:04 +01:00
internal.h	perf: Add wakeup watermark control to the AUX area	2015-04-02 17:14:16 +02:00
Makefile	ftrace: allow architectures to specify ftrace compile options	2015-01-29 09:19:19 +01:00
ring_buffer.c	smp: Make control dependencies work on Alpha, improve documentation	2015-05-27 12:58:02 -07:00
uprobes.c	Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux	2014-12-15 15:52:01 -08:00