tree 284c14c836412acdd0572ef020499749bca602d8
parent 984bc9601f64fd341b8573021d7c999f1f1499a9
author Tony Luck <tony.luck@intel.com> 1277919976 -0700
committer Tony Luck <tony.luck@intel.com> 1277919976 -0700

[IA64] Fix spinaphore down_spin()

Typo in down_spin() meant it only read the low 32 bits of the
"serve" value, instead of the full 64 bits. This results in the
system hanging when the values in ticket/serve get larger than
32-bits. A big enough system running the right test can hit this
in a just a few hours.

Broken since 883a3acf5b0d4782ac35981227a0d094e8b44850
    [IA64] Re-implement spinaphores using ticket lock concepts

Reported via IRC by Bjorn Helgaas

Signed-off-by: Tony Luck <tony.luck@intel.com>