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[PATCH] x86_64: Fix cluster mode send_IPI_allbutself to use get_cpu()/put_cpu()
Need to ensure we dont get prempted when we clear ourself from mask when using clustered mode genapic code. Signed-off-by: Ashok Raj <ashok.raj@intel.com> Acked-by: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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1 changed files with 5 additions and 1 deletions
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@ -72,10 +72,14 @@ static void cluster_send_IPI_mask(cpumask_t mask, int vector)
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static void cluster_send_IPI_allbutself(int vector)
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{
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cpumask_t mask = cpu_online_map;
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cpu_clear(smp_processor_id(), mask);
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int me = get_cpu(); /* Ensure we are not preempted when we clear */
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cpu_clear(me, mask);
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if (!cpus_empty(mask))
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cluster_send_IPI_mask(mask, vector);
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put_cpu();
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}
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static void cluster_send_IPI_all(int vector)
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