From: Robin Holt <holt@sgi.com>
Date: Fri, 18 May 2007 18:46:52 +0000 (-0500)
Subject: [IA64] Only unwind non-running tasks.
X-Git-Tag: v2.6.22-rc3~96^2~1
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6ae384884d936cb39ab20238af34689933e44525;p=pandora-kernel.git

[IA64] Only unwind non-running tasks.

Unwinding a running task has proven problematic.

In one instance, the running task was attempting to unwind itself and
received an interrupt between when get_wchan allocated local variables on
the stack and when unw_init_from_blocked_task was called which resulted
in unw_init_frame_info to place this tasks task_struct pointer over the
switch stack's ar_bspstore entry.

Signed-off-by: Robin Holt <holt@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
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