| commit | 1a17fdc4f4ed06b63fac1937470378a5441a663a | [log] [tgz] |
|---|---|---|
| author | Andreas Larsson <andreas@gaisler.com> | Wed Nov 05 15:52:08 2014 +0100 |
| committer | David S. Miller <davem@davemloft.net> | Fri Nov 07 12:51:44 2014 -0800 |
| tree | 1590a724b9a40458ba1a990ceb41fc51839196fc | |
| parent | ab5c780913bca0a5763ca05dd5c2cb5cb08ccb26 [diff] |
sparc32: Implement xchg and atomic_xchg using ATOMIC_HASH locks Atomicity between xchg and cmpxchg cannot be guaranteed when xchg is implemented with a swap and cmpxchg is implemented with locks. Without this, e.g. mcs_spin_lock and mcs_spin_unlock are broken. Signed-off-by: Andreas Larsson <andreas@gaisler.com> Signed-off-by: David S. Miller <davem@davemloft.net>