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Commit 0c2b9d5c authored by Ashok Raj's avatar Ashok Raj Committed by Linus Torvalds
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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: default avatarAshok Raj <ashok.raj@intel.com>
Acked-by: default avatarAndi Kleen <ak@muc.de>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 19aaabb5

arch/x86_64/kernel/genapic_cluster.c

+5 −1
Original line number Diff line number Diff line
@@ -72,10 +72,14 @@ static void cluster_send_IPI_mask(cpumask_t mask, int vector) 
static void cluster_send_IPI_allbutself(int vector)

{

	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))

		cluster_send_IPI_mask(mask, vector);



	put_cpu();

}



static void cluster_send_IPI_all(int vector)