sched: fix missing locking in sched_domains code

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Concurrent calls to detach_destroy_domains and arch_init_sched_domains
were prevented by the old scheduler subsystem cpu hotplug mutex. When
this got converted to get_online_cpus() the locking got broken.
Unlike before now several processes can concurrently enter the critical
sections that were protected by the old lock.

So use the already present doms_cur_mutex to protect these sections again.

Cc: Gautham R Shenoy <ego@in.ibm.com>
Cc: Paul Jackson <pj@sgi.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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This commit is contained in:

Heiko Carstens 2008-04-28 11:33:07 +02:00 • committed by Ingo Molnar

parent 690229a091

commit 712555ee4f

1 changed files with 12 additions and 17 deletions

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kernel/sched.c

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