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author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2017-07-01 02:18:28 +0300 |
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committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2017-08-17 17:29:57 +0300 |
commit | 66ce3a4dcb9f06fc6f15656b9434b4259fb4e319 (patch) | |
tree | 3fbfa730f2ac6a686aafe0bebc6bfe779cfaa1bd /arch/tile | |
parent | 4de5f89ef8498e012ba4755b9b63df28c1382690 (diff) | |
download | linux-66ce3a4dcb9f06fc6f15656b9434b4259fb4e319.tar.xz |
doc: Update memory-barriers.txt for read-to-write dependencies
The memory-barriers.txt document contains an obsolete passage stating that
smp_read_barrier_depends() is required to force ordering for read-to-write
dependencies. We now know that this is not required, even for DEC Alpha.
This commit therefore updates this passage to state that read-to-write
dependencies are respected even without smp_read_barrier_depends().
Reported-by: Lance Roy <ldr709@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Andrea Parri <parri.andrea@gmail.com>
Cc: Jade Alglave <j.alglave@ucl.ac.uk>
Cc: Luc Maranget <luc.maranget@inria.fr>
[ paulmck: Reference control-dependencies sections and use WRITE_ONCE()
per Will Deacon. Correctly place split-cache paragraph while there. ]
Acked-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/tile')
0 files changed, 0 insertions, 0 deletions