tree f87fd2f7cf75b9d2b1180452120f8dd852d2c9b6
parent 90a8a73c06cc32b609a880d48449d7083327e11a
author Dimitri Sivanich <sivanich@sgi.com> 1293564882 -0600
committer Tony Luck <tony.luck@intel.com> 1293573981 -0800

[IA64] eliminate race condition in smp_flush_tlb_mm

A race condition exists within smp_call_function_many() when called from
smp_flush_tlb_mm().  On rare occasions the cpu_vm_mask can be cleared
while smp_call_function_many is executing, occasionally resulting in a
hung process.

Make a copy of the mask prior to calling smp_call_function_many().

Signed-off-by: Dimitri Sivanich <sivanich@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>