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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>
This commit is contained in:
Ashok Raj 2005-09-06 15:16:18 -07:00 committed by Linus Torvalds
parent 19aaabb584
commit 0c2b9d5c03
1 changed files with 5 additions and 1 deletions
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6
arch/x86_64/kernel/genapic_cluster.c
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@ -72,10 +72,14 @@ static void cluster_send_IPI_mask(cpumask_t mask, int vector)
static void cluster_send_IPI_allbutself(int vector) static void cluster_send_IPI_allbutself(int vector)
{ {
cpumask_t mask = cpu_online_map; cpumask_t mask = cpu_online_map;
cpu_clear(smp_processor_id(), mask); int me = get_cpu(); /* Ensure we are not preempted when we clear */
cpu_clear(me, mask);
if (!cpus_empty(mask)) if (!cpus_empty(mask))
cluster_send_IPI_mask(mask, vector); cluster_send_IPI_mask(mask, vector);
put_cpu();
} }
static void cluster_send_IPI_all(int vector) static void cluster_send_IPI_all(int vector)