tree 284b3b25fe53905286444ad0beacbba0663771f8
parent 7b903e6c021a5462e26ea7a8f014fa60b6782bdb
author Jonas Bonn <jonas@southpole.se> 1334744619 +0200
committer Jonas Bonn <jonas@southpole.se> 1336470239 +0200

openrisc: use scratch regs in atomic syscall

The function sys_or1k_atomic was using call-saved registers without
restoring their value before returning.  This is a faux pas: either
we need to restore their values or use scratch regs; the latter is
less code so that's the route this patch takes.

Thanks to David Hennerström for doing most of the heavy-lifting in
tracking this one down.

Reported-by: Davd Hennerström <david.hennerstrom@aacmicrotec.com>
Signed-off-by: Jonas Bonn <jonas@southpole.se>