Files
linux/include/uapi/linux
Peter Zijlstra 0fb024c437 perf: Fix perf ring buffer memory ordering
commit bf378d341e upstream.

The PPC64 people noticed a missing memory barrier and crufty old
comments in the perf ring buffer code. So update all the comments and
add the missing barrier.

When the architecture implements local_t using atomic_long_t there
will be double barriers issued; but short of introducing more
conditional barrier primitives this is the best we can do.

Reported-by: Victor Kaplansky <victork@il.ibm.com>
Tested-by: Victor Kaplansky <victork@il.ibm.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: michael@ellerman.id.au
Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>
Cc: Michael Neuling <mikey@neuling.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: anton@samba.org
Cc: benh@kernel.crashing.org
Link: http://lkml.kernel.org/r/20131025173749.GG19466@laptop.lan
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Michael Neuling <mikey@neuling.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-11-20 12:27:47 -08:00
..
2013-04-26 16:08:16 +10:00
2013-05-06 15:55:19 -04:00
2012-10-16 18:49:15 -07:00
2013-03-27 14:37:47 +00:00
2013-02-14 00:54:17 -05:00
2013-03-28 01:20:42 -04:00
2013-07-28 16:29:46 -07:00
2012-12-03 15:07:36 -05:00
2013-03-17 19:40:50 -07:00
2013-06-19 18:30:27 -07:00
2013-06-11 11:06:34 +03:00
2013-02-27 19:10:22 -08:00
2013-04-19 14:57:57 -04:00
2012-11-16 10:15:35 -08:00
2013-03-17 14:35:13 -04:00
2013-03-22 16:19:59 -07:00
2013-03-21 12:36:33 -04:00
2013-05-02 13:40:15 +03:00