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author | Rusty Russell <rusty@rustcorp.com.au> | 2008-11-25 09:59:20 +1030 |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-11-26 07:58:29 +0100 |
commit | 1224e376f2a7e3c7ab19ef37099a78597978a696 (patch) | |
tree | 244bbf8c345ac70487ddcb6283c7895f6cbdb7dd /arch/arm/configs/corgi_defconfig | |
parent | 3d8cbdf8650f44d95333ca645d950832a0653f35 (diff) |
sched: avoid stack var in move_task_off_dead_cpu, fix
Impact: locking fix
We can't call cpuset_cpus_allowed_locked() with the rq lock held.
However, the rq lock merely protects us from (1) cpu_online_mask changing
and (2) someone else changing p->cpus_allowed.
The first can't happen because we're being called from a cpu hotplug
notifier. The second doesn't really matter: we are forcing the task off
a CPU it was affine to, so we're not doing very well anyway.
So we remove the rq lock from this path, and all is good.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Mike Travis <travis@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/arm/configs/corgi_defconfig')
0 files changed, 0 insertions, 0 deletions