tree 14c484611c8cbbe144c980e3b0c2c9b6e3c66b11
parent c7d8db66ffd1c20b6a27445af892c28305e64e8a
author Alexey Brodkin <abrodkin@synopsys.com> 1465363494 +0300
committer Alexey Brodkin <abrodkin@synopsys.com> 1465821485 +0200

arc: Update data accessors with use of memory barriers

Memory barriers are proven to be a requirement for both compiler and
real hardware to properly serialize access to critical data.

For example if CPU or data bus it uses may do reordering of data
accesses absence of memory barriers might easily lead to very subtle and
hard to debug data corruptions.

This implementation was heavily borrowed from up to date Linux kernel.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>